Carrier Ethernet Configuration Guide, Cisco IOS XE Release 3S (ASR 1000)
Configuring Ethernet Connectivity Fault Management in a Service Provider Network
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Configuring Ethernet Connectivity Fault Management in a Service Provider Network

Contents

Configuring Ethernet Connectivity Fault Management in a Service Provider Network

Ethernet Connectivity Fault Management (CFM) is an end-to-end per-service-instance Ethernet layer operations, administration, and maintenance (OAM) protocol. It includes proactive connectivity monitoring, fault verification, and fault isolation for large Ethernet metropolitan-area networks (MANs) and WANs.

The advent of Ethernet as a MAN and WAN technology imposes a new set of OAM requirements on Ethernet’s traditional operations, which were centered on enterprise networks only. The expansion of Ethernet technology into the domain of service providers, where networks are substantially larger and more complex than enterprise networks and the user base is wider, makes operational management of link uptime crucial. More importantly, the timeliness in isolating and responding to a failure becomes mandatory for normal day-to-day operations, and OAM translates directly to the competitiveness of the service provider.


Note


As an alternative, CFM can be configured over an Ethernet flow point (EFP) interface by using the cross connect functionality. For more information about this alternative, see Configuring the CFM over EFP Interface with Cross Connect Feature.


Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for Configuring Ethernet CFM in a Service Provider Network

Business Requirements

  • Network topology and network administration have been evaluated.
  • Business and service policies have been established.
  • Partial Route Computation (PRC) codes have been implemented for all supported commands related to configuring High Availability (HA) on a maintenance endpoint (MEP), maintenance intermediate point (MIP), level, service instance ID, cross-check timer, cross-check, and domain.

Restrictions for Configuring Ethernet CFM in a Service Provider Network

  • CFM loopback messages will not be confined within a maintenance domain according to their maintenance level. The impact of not having CFM loopback messages confined to their maintenance levels occurs at these levels:
    • Architecture—CFM layering is violated for loopback messages.
    • Deployment—A user may potentially misconfigure a network and have loopback messages succeed.
    • Security—A malicious device that recognizes devices’ MAC addresses and levels may potentially explore a network topology that should be transparent.
  • CFM is not fully supported on a Multiprotocol Label Switching (MPLS) provider edge (PE) device. There is no interaction between CFM and an Ethernet over MPLS (EoMPLS) pseudowire.
  • CFM configuration is not supported on an EtherChannel in FastEthernet Channel (FEC) mode.
  • The HA features NFS/SSO Support in CFM 802.1ag/1.0d and ISSU Support in CFM 802.1ag/1.0d are not supported on customer edge (CE) devices.
  • The NFS/SSO Support in CFM 802.1ag/1.0d feature is not supported for the traceroute and error databases.

Information About Configuring Ethernet CFM in a Service Provider Network

Ethernet CFM

Ethernet CFM is an end-to-end per-service-instance Ethernet layer OAM protocol that includes proactive connectivity monitoring, fault verification, and fault isolation. End to end can be PE to PE or CE to CE. A service can be identified as a service provider VLAN (S-VLAN) or an EVC service.

Being an end-to-end technology is the distinction between CFM and other metro-Ethernet OAM protocols. For example, MPLS, ATM, and SONET OAM help in debugging Ethernet wires but are not always end-to-end. 802.3ah OAM is a single-hop and per-physical-wire protocol. It is not end to end or service aware.

Troubleshooting carrier networks offering Ethernet Layer 2 services is challenging. Customers contract with service providers for end-to-end Ethernet service and service providers may subcontract with operators to provide equipment and networks. Compared to enterprise networks, where Ethernet traditionally has been implemented, these constituent networks belong to distinct organizations or departments, are substantially larger and more complex, and have a wider user base. Ethernet CFM provides a competitive advantage to service providers for which the operational management of link uptime and timeliness in isolating and responding to failures is crucial to daily operations.

Benefits of Ethernet CFM

  • End-to-end service-level OAM technology
  • Reduced operating expense for service provider Ethernet networks
  • Competitive advantage for service providers
  • Supports both distribution and access network environments with the outward facing MEPs enhancement

Customer Service Instance

A customer service instance is an Ethernet virtual connection (EVC), which is identified by an S-VLAN within an Ethernet island, and is identified by a globally unique service ID. A customer service instance can be point-to-point or multipoint-to-multipoint. The figure below shows two customer service instances. Service Instance Green is point to point; Service Instance Blue is multipoint to multipoint.

Maintenance Domain

A maintenance domain is a management space for the purpose of managing and administering a network. A domain is owned and operated by a single entity and defined by the set of ports internal to it and at its boundary. The figure below illustrates a typical maintenance domain.

A unique maintenance level in the range of 0 to 7 is assigned to each domain by a network administrator. Levels and domain names are useful for defining the hierarchical relationship that exists among domains. The hierarchical relationship of domains parallels the structure of customer, service provider, and operator. The larger the domain, the higher the level value. For example, a customer domain would be larger than an operator domain. The customer domain may have a maintenance level of 7 and the operator domain may have a maintenance level of 0. Typically, operators would have the smallest domains and customers the largest domains, with service provider domains between them in size. All levels of the hierarchy must operate together.

Domains should not intersect because intersecting would mean management by more than one entity, which is not allowed. Domains may nest or touch but when two domains nest, the outer domain must have a higher maintenance level than the domain nested within it. Nesting maintenance domains is useful in the business model where a service provider contracts with one or more operators to provide Ethernet service to a customer. Each operator would have its own maintenance domain and the service provider would define its domain—a superset of the operator domains. Furthermore, the customer has its own end-to-end domain which is in turn a superset of the service provider domain. Maintenance levels of various nesting domains should be communicated among the administering organizations. For example, one approach would be to have the service provider assign maintenance levels to operators.

CFM exchanges messages and performs operations on a per-domain basis. For example, running CFM at the operator level does not allow discovery of the network by the higher provider and customer levels.

Network designers decide on domains and configurations. The figure below illustrates a hierarchy of operator, service provider, and customer domains and also illustrates touching, intersecting, and nested domains.

Maintenance Point

A maintenance point is a demarcation point on an interface (port) that participates in CFM within a maintenance domain. Maintenance points on device ports act as filters that confine CFM frames within the bounds of a domain by dropping frames that do not belong to the correct level. Maintenance points must be explicitly configured on Cisco devices. Two classes of maintenance points exist, MEPs and MIPs.

Maintenance Endpoints

Maintenance endpoints (MEPs) have the following characteristics:

  • Per maintenance domain (level) and service (S-VLAN or EVC)
  • At the edge of a domain, define the boundary
  • Within the bounds of a maintenance domain, confine CFM messages
  • When configured to do so, proactively transmit Connectivity Fault Management (CFM) continuity check messages (CCMs)
  • At the request of an administrator, transmit traceroute and loopback messages
Inward Facing MEPs

Inward facing means the MEP communicates through the Bridge Relay function and uses the Bridge-Brain MAC address. An inward facing MEP performs the following functions:

  • Sends and receives CFM frames at its level through the relay function, not via the wire connected to the port on which the MEP is configured.
  • Drops all CFM frames at its level (or lower level) that come from the direction of the wire.
  • Processes all CFM frames at its level coming from the direction of the relay function.
  • Drops all CFM frames at a lower level coming from the direction of the relay function.
  • Transparently forwards all CFM frames at its level (or a higher level), independent of whether they come in from the relay function side or the wire side.

Note


A MEP of level L (where L is less than 7) requires a MIP of level M > L on the same port; hence, CFM frames at a level higher than the level of the MEP will be catalogued by this MIP.


  • If the port on which the inward MEP is configured is blocked by Spanning-Tree Protocol, the MEP can no longer transmit or receive CFM messages.
Outward Facing MEPs for Port Channels

Outward facing means that the MEP communicates through the wire. Outward facing MEPs can be configured on port channels (using cross connect functionality). A MIP configuration at a level higher than the level of the outward facing MEP is not required.

Outward facing MEPs on port channels use the Bridge-Brain MAC address of the first member link. When port channel members change, the identities of outward facing MEPs do not have to change.

An outward facing MEP performs the following functions:

  • Sends and receives CFM frames at its level via the wire connected to the port where the MEP is configured.
  • Drops all CFM frames at its level (or at a lower level) that come from the direction of the relay function.
  • Processes all CFM frames at its level coming from the direction of the wire.
  • Drops all CFM frames at a lower level coming from the direction of the wire.
  • Transparently forwards all CFM frames at levels higher than the level of the outward facing MEP, independent of whether they come in from the relay function side or the wire side.
  • If the port on which the outward MEP is configured is blocked by the Spanning-Tree Protocol, the MEP can still transmit and receive CFM messages via the wire.

Maintenance Intermediate Points

MIPs have the following characteristics:

  • Per maintenance domain (level) and for all S-VLANs enabled or allowed on a port.
  • Internal to a domain, not at the boundary.
  • CFM frames received from MEPs and other MIPs are cataloged and forwarded, using both the wire and the relay function.
  • All CFM frames at a lower level are stopped and dropped, independent of whether they originate from the wire or relay function.
  • All CFM frames at a higher level are forwarded, independent of whether they arrive from the wire or relay function.
  • Passive points respond only when triggered by CFM traceroute and loopback messages.
  • Bridge-Brain MAC addresses are used.

If the port on which a MIP is configured is blocked by Spanning-Tree Protocol, the MIP cannot receive CFM messages or relay them toward the relay function side. The MIP can, however, receive and respond to CFM messages from the wire.

A MIP has only one level associated with it and the command-line interface (CLI) does not allow you to configure a MIP for a domain that does not exist.

The figure below illustrates MEPs and MIPs at the operator, service provider, and customer levels.

CFM Messages

CFM uses standard Ethernet frames. CFM frames are distinguishable by EtherType and for multicast messages by MAC address. CFM frames are sourced, terminated, processed, and relayed by bridges. Routers can support only limited CFM functions.

Bridges that cannot interpret CFM messages forward them as normal data frames. All CFM messages are confined to a maintenance domain and to an S-VLAN (PE-VLAN or Provider-VLAN). Three types of messages are supported:

  • Continuity Check
  • Loopback
  • Traceroute

Continuity Check Messages

CFM CCMs are multicast heartbeat messages exchanged periodically among MEPs. They allow MEPs to discover other MEPs within a domain and allow MIPs to discover MEPs. CCMs are confined to a domain and S-VLAN.

CFM CCMs have the following characteristics:

  • Transmitted at a configurable periodic interval by MEPs. The interval can be from 10 seconds to 65535 seconds, the default is 30.
  • Contain a configurable hold-time value to indicate to the receiver the validity of the message. The default is 2.5 times the transmit interval.
  • Catalogued by MIPs at the same maintenance level.
  • Terminated by remote MEPs at the same maintenance level.
  • Unidirectional and do not solicit a response.
  • Carry the status of the port on which the MEP is configured.

Loopback Messages

CFM loopback messages are unicast frames that a MEP transmits, at the request of an administrator, to verify connectivity to a particular maintenance point. A reply to a loopback message indicates whether a destination is reachable but does not allow hop-by-hop discovery of the path. A loopback message is similar in concept to an Internet Control Message Protocol (ICMP) Echo (ping) message.

A CFM loopback message can be generated on demand using the CLI. The source of a loopback message must be a MEP; the destination may be a MEP or a MIP. CFM loopback messages are unicast; replies to loopback messages also are unicast. CFM loopback messages specify the destination MAC address, VLAN, and maintenance domain.

Traceroute Messages

CFM traceroute messages are multicast frames that a MEP transmits, at the request of an administrator, to track the path (hop-by-hop) to a destination MEP. They allow the transmitting node to discover vital connectivity data about the path, and allow the discovery of all MIPs along the path that belong to the same maintenance domain. For each visible MIP, traceroute messages indicate ingress action, relay action, and egress action. Traceroute messages are similar in concept to User Datagram Protocol (UDP) traceroute messages.

Traceroute messages include the destination MAC address, VLAN, and maintenance domain and they have Time To Live (TTL) to limit propagation within the network. They can be generated on demand using the CLI. Traceroute messages are multicast; reply messages are unicast.

Cross-Check Function

The cross-check function is a timer-driven post-provisioning service verification between dynamically discovered MEPs (via CCMs) and expected MEPs (via configuration) for a service. The cross-check function verifies that all endpoints of a multipoint or point-to-point service are operational. The function supports notifications when the service is operational; otherwise it provides alarms and notifications for unexpected endpoints or missing endpoints.

The cross-check function is performed one time. You must initiate the cross-check function from the CLI every time you want a service verification.

SNMP Traps

The support provided by the Cisco software implementation of CFM traps is Cisco proprietary information. MEPs generate two types of Simple Network Management Protocol (SNMP) traps, continuity check (CC) traps and cross-check traps.

CC Traps

  • MEP up—Sent when a new MEP is discovered, the status of a remote port changes, or connectivity from a previously discovered MEP is restored after interruption.
  • MEP down—Sent when a timeout or last gasp event occurs.
  • Cross-connect—Sent when a service ID does not match the VLAN.
  • Loop—Sent when a MEP receives its own CCMs.
  • Configuration error—Sent when a MEP receives a continuity check with an overlapping MPID.

Cross-Check Traps

  • Service up—Sent when all expected remote MEPs are up in time.
  • MEP missing—Sent when an expected MEP is down.
  • Unknown MEP—Sent when a CCM is received from an unexpected MEP.

Ethernet CFM and Ethernet OAM Interaction

To understand how CFM and OAM interact, you should understand the following concepts:

Ethernet Virtual Circuit

An EVC as defined by the Metro Ethernet Forum is a port-level point-to-point or multipoint-to-multipoint Layer 2 circuit. EVC status can be used by a CE device either to find an alternative path in to the service provider network or in some cases, to fall back to a backup path over Ethernet or over another alternative service such as ATM.

OAM Manager

The OAM manager is an infrastructure element that streamlines interaction between OAM protocols. The OAM manager requires two interworking OAM protocols, in this case Ethernet CFM and Ethernet OAM. Interaction is unidirectional from the OAM manager to the CFM protocol and the only information exchanged is the user network interface (UNI) port status. Additional port status values available include

  • REMOTE_EE—Remote excessive errors
  • LOCAL_EE—Local excessive errors
  • TEST—Either remote or local loopback

After CFM receives the port status, it communicates that status across the CFM domain.

CFM over Bridge Domains

Connectivity Fault Management (CFM) over bridge domains allows untagged CFM packets to be associated with a maintenance end point (MEP). An incoming untagged customer CFM packet has an EtherType of CFM and is mapped to an Ethernet virtual circuit (EVC) or bridge domain based on the encapsulation configured on the Ethernet flow point (EFP). The EFP is configured specifically to recognize these untagged packets.

An EFP is a logical demarcation point of an EVC on an interface and can be associated with a bridge domain. The VLAN ID is used to match and map traffic to the EFP. VLAN IDs have local significance per port similar to an ATM virtual circuit. CFM is supported on a bridge domain associated with an EFP. The association between the bridge domain and the EFP allows CFM to use the encapsulation on the EFP. All EFPs in the same bridge domain form a broadcast domain. The bridge domain ID determines the broadcast domain.

The distinction between a VLAN port and the EFP is the encapsulation. VLAN ports use a default dot1q encapsulation. For EFPs, untagged, single tagged, and double tagged encapsulation exists with dot1q and IEEE dot1ad EtherTypes. Different EFPs belonging to the same bridge domain can use different encapsulations.

HA Features Supported by CFM

In access and service provider networks using Ethernet technology, High Availability (H)A is a requirement, especially on Ethernet OAM components that manage EVC connectivity. End-to-end connectivity status information is critical and must be maintained on a hot standby Route Switch Processor (RSP).


Note


A hot standby Route Switch Processor (RSP) has the same software image as the active RSP and supports synchronization of protocol and application state information between RSPs for supported features and protocols.


End-to-end connectivity status is maintained on the customer edge (CE), provider edge (PE), and access aggregation PE (uPE) network nodes based on information received by protocols such as Connectivity Fault Management (CFM) and 802.3ah. This status information is used to either stop traffic or switch to backup paths when an EVC is down.

Every transaction involves either accessing or updating data among various databases. If the database is synchronized across active and standby modules, the modules are transparent to clients.

The Cisco infrastructure provides various component application program interfaces (APIs) that help to maintain a hot standby RSP. Metro Ethernet HA clients HA/ISSU, CFM HA/ISSU, and 802.3ah HA/ISSU interact with these components, update the database, and trigger necessary events to other components.

Benefits of CFM HA

  • Elimination of network downtime for Cisco software image upgrades, allowing for faster upgrades.
  • Elimination of resource scheduling challenges associated with planned outages and late night maintenance windows.
  • Accelerated deployment of new services and applications and facilitation of faster implementation of new features.
  • Reduced operating costs due to outages while delivering higher service levels.
  • CFM updates its databases and controls its own HA messaging and versioning, and this control facilitates maintenance.

CFM HA in a Metro Ethernet Network

A standalone Connectivity Fault Management (CFM) implementation does not have explicit high availability (HA) requirements. When CFM is implemented on a customer edge (CE) or provider edge (PE), CFM must maintain the Ethernet virtual circuit (EVC) state, which requires HA because the EVC state is critical in maintaining end-to-end connectivity. CFM configures the platform with maintenance level, domain, and maintenance point, learns the remote maintenance point information, and maps it to the appropriate EVC. CFM then aggregates data received from all remote ports; consequently HA requirements vary for CE and PE.

The CE receives the EVC ID, associated customer VLANs, UNI information, EVC state, and remote UNI ID and state from the MEN. The CE relies on the EVC state to send or stop traffic to the MEN.

The PE has EVC configuration and associated customer VLAN information and derives the EVC state and remote UNI from CFM.


Note


PEs and CEs running 802.3ah OAM must maintain the port state so peers are not affected by a switchover. This information is also sent to remote nodes in CFM CC messages.


NSF SSO Support in CFM 802.1ag 1.0d

The redundancy configurations Stateful Switchover (SSO) and Nonstop Forwarding (NSF) are both supported in Ethernet Connectivity Fault Management (CFM) and are automatically enabled. A switchover from an active to a standby Route Switch Processor (RSP) occurs when the active RSP fails, is removed from the networking device, or is manually taken down for maintenance. NSF interoperates with the SSO feature to minimize network downtime following a switchover. The primary function of Cisco NSF is to continue forwarding IP packets following an RSP switchover.

For detailed information about SSO, see the “Configuring Stateful Switchover” module of the High Availability Configuration Guide. For detailed information about the NSF feature, see the “Configuring Cisco Nonstop Forwarding” module of the High Availability Configuration Guide.

ISSU Support in CFM 802.1ag 1.0d

In Service Upgrades (ISSUs) allow you to perform a Cisco software upgrade or downgrade without disrupting packet flow. Connectivity Fault Management (CFM) performs a bulk update and a runtime update of the continuity check database to the standby Route Switch Processor (RSP), including adding, deleting, or updating a row. This checkpoint data requires ISSU capability to transform messages from one release to another. All the components that perform active RSP to standby RSP updates using messages require ISSU support.

ISSU is automatically enabled in CFM and lowers the impact that planned maintenance activities have on network availability by allowing software changes while the system is in service. For detailed information about ISSU, see the “Performing an In Service Software Upgrade ” module of the High Availability Configuration Guide.

How to Set Up Ethernet CFM in a Service Provider Network

Designing CFM Domains


Note


To have an operator, service provider, or customer domain is optional. A network may have a single domain or multiple domains. The steps listed here show the sequence when all three types of domains will be assigned.


Before You Begin
  • Knowledge and understanding of the network topology.
  • Understanding of organizational entities involved in managing the network; for example, operators, service providers, network operations centers (NOCs), and customer service centers.
  • Understanding of the type and scale of services to be offered.
  • Agreement by all organizational entities on the responsibilities, roles, and restrictions for each organizational entity.
  • Determination of the number of maintenance domains in the network.
  • Determination of the nesting and disjoint maintenance domains.
  • Assignment of maintenance levels and names to domains based on agreement between the service provider and operator or operators.
  • Determination of whether the domain should be inward or outward.
SUMMARY STEPS

    1.    Determine operator level MIPs.

    2.    Determine operator level MEPs.

    3.    Determine service provider MIPs.

    4.    Determine service provider MEPs.

    5.    Determine customer MIPs.

    6.    Determine customer MEPs.


DETAILED STEPS
      Command or Action Purpose
    Step 1 Determine operator level MIPs.  

    Follow these steps:

    • Starting at lowest operator level domain, assign a MIP at every interface internal to the operator network to be visible to CFM.
    • Proceed to next higher operator level and assign MIPs.
    • Verify that every port that has a MIP at a lower level does not have maintenance points at a higher level.
    • Repeat steps a through d until all operator MIPs are determined.
     
    Step 2 Determine operator level MEPs.  

    Follow these steps:

    • Starting at the lowest operator level domain, assign a MEP at every UNI that is part of a service instance.
    • Assign a MEP at the network to network interface (NNI) between operators, if there is more than one operator.
    • Proceed to next higher operator level and assign MEPs.
    • A port with a MIP at a lower level cannot have maintenance points at a higher level. A port with a MEP at a lower level should have either a MIP or MEP at a higher level.
     
    Step 3 Determine service provider MIPs.  

    Follow these steps:

    • Starting at the lowest service provider level domain, assign service provider MIPs at the NNI between operators (if more than one).
    • Proceed to next higher service provider level and assign MIPs.
    • A port with a MIP at a lower level cannot have maintenance points at a higher level. A port with a MEP at a lower level should not have either a MIP or a MEP at a higher level.
     
    Step 4 Determine service provider MEPs.  

    Follow these steps:

    • Starting at the lowest service provider level domain, assign a MEP at every UNI that is part of a service instance.
    • Proceed to next higher service provider level and assign MEPs.
    • A port with a MIP at a lower level cannot have maintenance points at a higher level. A port with a MEP at a lower level should have either a MIP or a MEP at a higher level.
     
    Step 5 Determine customer MIPs.  

    Customer MIPs are allowed only on the UNIs at the uPEs if the service provider allows the customer to run CFM. Otherwise, the service provider can configure Cisco devices to block CFM frames.

    • Configure a MIP on every uPE, at the UNI port, in the customer maintenance domain.
    • Ensure the MIPs are at a maintenance level that is at least one higher than the highest level service provider domain.
     
    Step 6 Determine customer MEPs.  

    Customer MEPs are on customer equipment. Assign an outward facing MEP within an outward domain at the appropriate customer level at the handoff between the service provider and the customer.

     

    Examples

    The figure below shows an example of a network with a service provider and two operators, A and B. Three domains are to be established to map to each operator and the service provider. In this example, for simplicity we assume that the network uses Ethernet transport end to end. CFM, however, can be used with other transports.

    What to Do Next

    After you have defined the Ethernet CFM domains, configure Ethernet CFM functionality by first provisioning the network and then provisioning service.

    Configuring Ethernet CFM

    Configuring Ethernet CFM consists of the following tasks:

    Provisioning the Network

    Provisioning the Network on the CE-A
    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    ethernet cfm domain domain-name level level-id

      4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

      5.    continuity-check

      6.    continuity-check [interval cc-interval]

      7.    exit

      8.    mep archive-hold-time minutes

      9.    exit

      10.    ethernet cfm global

      11.    ethernet cfm traceroute cache

      12.    ethernet cfm traceroute cache size entries

      13.    ethernet cfm traceroute cache hold-time minutes

      14.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

      15.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

      16.    end


    DETAILED STEPS
        Command or Action Purpose
      Step 1 enable


      Example:
      Device> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Device# configure terminal
       

      Enters global configuration mode.

       
      Step 3 ethernet cfm domain domain-name level level-id


      Example:
      Device(config)# ethernet cfm domain Customer level 7
       

      Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

       
      Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


      Example:
      Device(config-ecfm)# service s41 evc 41 vlan 41 
       

      Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

       
      Step 5 continuity-check


      Example:
      Device(config-ecfm-srv)# continuity-check 
       

      Configures the transmission of continuity check messages (CCMs).

       
      Step 6 continuity-check [interval cc-interval]


      Example:
      Device(config-ecfm-srv)# continuity-check interval 10s
       

      Configures the per-service parameters and sets the interval at which CCMs are transmitted.

       
      Step 7 exit


      Example:
      Device(config-ecfm-srv)# exit
       

      Returns to Ethernet connectivity fault management configuration mode.

       
      Step 8 mep archive-hold-time minutes


      Example:
      Device(config-ecfm)# mep archive-hold-time 60
       

      Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

       
      Step 9 exit


      Example:
      Device(config-ecfm)# exit
       

      Returns to global configuration mode.

       
      Step 10 ethernet cfm global


      Example:
      Device(config)# ethernet cfm global
       

      Enables CFM processing globally on the device.

       
      Step 11 ethernet cfm traceroute cache


      Example:
      Device(config)# ethernet cfm traceroute cache
       

      Enables caching of CFM data learned through traceroute messages.

       
      Step 12 ethernet cfm traceroute cache size entries


      Example:
      Device(config)# ethernet cfm traceroute cache size 200
       

      Sets the maximum size for the CFM traceroute cache table.

       
      Step 13 ethernet cfm traceroute cache hold-time minutes


      Example:
      Device(config)# ethernet cfm traceroute cache hold-time 60
       

      Sets the amount of time that CFM traceroute cache entries are retained.

       
      Step 14 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


      Example:
      Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
       

      Enables SNMP trap generation for Ethernet CFM continuity check events.

       
      Step 15 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


      Example:
      Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
       

      Enables SNMP trap generation for Ethernet CFM continuity check events in relation to the cross-check operation between statically configured MEPS and those learned via CCMs.

       
      Step 16 end


      Example:
      Device(config)# end
       

      Returns to privileged EXEC mode.

       
      Provisioning the Network on the U-PE A
      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    ethernet cfm domain domain-name level level-id

        4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

        5.    continuity-check

        6.    continuity-check [interval cc-interval]

        7.    exit

        8.    mep archive-hold-time minutes

        9.    exit

        10.    ethernet cfm global

        11.    ethernet cfm traceroute cache

        12.    ethernet cfm traceroute cache size entries

        13.    ethernet cfm traceroute cache hold-time minutes

        14.    interface type number

        15.    service instance id ethernet [evc-name]

        16.    encapsulation encapsulation-type

        17.    bridge-domain bridge-id

        18.    cfm mip level { level }

        19.    exit

        20.    exit

        21.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

        22.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

        23.    end


      DETAILED STEPS
          Command or Action Purpose
        Step 1 enable


        Example:
        Device> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 configure terminal


        Example:
        Device# configure terminal
         

        Enters global configuration mode.

         
        Step 3 ethernet cfm domain domain-name level level-id


        Example:
        Device(config)# ethernet cfm domain Customer level 7 
         

        Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

         
        Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


        Example:
        Device(config-ecfm)# service s41 evc 41 vlan 41 
         

        Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

         
        Step 5 continuity-check


        Example:
        Device(config-ecfm-srv)# continuity-check 
         

        Configures the transmission of continuity check messages (CCMs).

         
        Step 6 continuity-check [interval cc-interval]


        Example:
        Device(config-ecfm-srv)# continuity-check interval 10s
         

        Configures the per-service parameters and sets the interval at which CCMs are transmitted.

         
        Step 7 exit


        Example:
        Device(config-ecfm-srv)# exit
         

        Returns to Ethernet connectivity fault management configuration mode.

         
        Step 8 mep archive-hold-time minutes


        Example:
        Device(config-ecfm)# mep archive-hold-time 60
         

        Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

         
        Step 9 exit


        Example:
        Device(config-ecfm)# exit
         

        Returns to global configuration mode.

         
        Step 10 ethernet cfm global


        Example:
        Device(config)# ethernet cfm global
         

        Enables CFM processing globally on the device.

         
        Step 11 ethernet cfm traceroute cache


        Example:
        Device(config)# ethernet cfm traceroute cache
         

        Enables caching of CFM data learned through traceroute messages.

         
        Step 12 ethernet cfm traceroute cache size entries


        Example:
        Device(config)# ethernet cfm traceroute cache size 200
         

        Sets the maximum size for the CFM traceroute cache table.

         
        Step 13 ethernet cfm traceroute cache hold-time minutes


        Example:
        Device(config)# ethernet cfm traceroute cache hold-time 60
         

        Sets the amount of time that CFM traceroute cache entries are retained.

         
        Step 14 interface type number


        Example:
        Device(config)# interface gigabitethernet4/2
         

        Specifies an interface and enters interface configuration mode.

         
        Step 15 service instance id ethernet [evc-name]


        Example:
        Device(config-if)# service instance 333 ethernet evc1 
         

        Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

         
        Step 16 encapsulation encapsulation-type


        Example:
        Device(config-if-srv)# encapsulation ppp
         

        Sets the encapsulation method used by the interface.

         
        Step 17 bridge-domain bridge-id


        Example:
        Device(config-if-srv)# bridge-domain 100
         

        Binds a service instance to a bridge domain instance.

         
        Step 18 cfm mip level { level }


        Example:
        Device(config-if-srv)#cfm mip level 4 
         

        Creates a MIP and sets the maintenance level number.

         
        Step 19 exit


        Example:
        Device(config-if-srv)# exit
         

        Returns to interface configuration mode.

         
        Step 20 exit


        Example:
        Device(config-if)# exit
         

        Returns to global configuration mode.

         
        Step 21 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


        Example:
        Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
         

        Enables SNMP trap generation for Ethernet CFM mep-up, mep-down, config, loop, and cross-connect events.

         
        Step 22 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


        Example:
        Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
         

        Enables SNMP trap generation for Ethernet CFM mep-unknown, mep-missing, and service-up continuity check events in relation to the cross-check operation between statically configured MEPs and those learned via CCMs.

         
        Step 23 end


        Example:
        Device(config)# end
         

        Returns to privileged EXEC mode.

         
        Provisioning the Network on the PE-AGG A
        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    ethernet cfm domain domain-name level level-id

          4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

          5.    continuity-check

          6.    continuity-check [ interval cc-interval]

          7.    exit

          8.    mep archive-hold-time minutes

          9.    exit

          10.    ethernet cfm global

          11.    interface type number

          12.    service instance id ethernet [evc-name]

          13.    encapsulation encapsulation-type

          14.    bridge-domain bridge-id

          15.    cfm mip level level

          16.    end


        DETAILED STEPS
            Command or Action Purpose
          Step 1 enable


          Example:
          Device> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.
           
          Step 2 configure terminal


          Example:
          Device# configure terminal
           

          Enters global configuration mode.

           
          Step 3 ethernet cfm domain domain-name level level-id


          Example:
          Device(config)# ethernet cfm domain Customer level 7
           

          Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

           
          Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


          Example:
          Device(config-ecfm)# service s41 evc 41 vlan 41 
           

          Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

           
          Step 5 continuity-check


          Example:
          Device(config-ecfm-srv)# continuity-check 
           

          Configures the transmission of continuity check messages (CCMs).

           
          Step 6 continuity-check [ interval cc-interval]


          Example:
          Device(config-ecfm-srv)# continuity-check interval 10s
           

          Configures the per-service parameters and sets the interval at which CCMs are transmitted.

           
          Step 7 exit


          Example:
          Device(config-ecfm-srv)# exit
           

          Returns to Ethernet connectivity fault management configuration mode.

           
          Step 8 mep archive-hold-time minutes


          Example:
          Device(config-ecfm)# mep archive-hold-time 65
           

          Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

           
          Step 9 exit


          Example:
          Device(config-ecfm)# exit
           

          Returns the CLI to global configuration mode.

           
          Step 10 ethernet cfm global


          Example:
          Device(config)# ethernet cfm global
           

          Enables CFM processing globally on the device.

           
          Step 11 interface type number


          Example:
          Device(config)# interface gigabitethernet3/1
           

          Specifies an interface and enters interface configuration mode.

           
          Step 12 service instance id ethernet [evc-name]


          Example:
          Device(config-if)# service instance 333 ethernet evc1 
           

          Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

           
          Step 13 encapsulation encapsulation-type


          Example:
          Device(config-if-srv)# encapsulation ppp
           

          Sets the encapsulation method used by the interface.

           
          Step 14 bridge-domain bridge-id


          Example:
          Device(config-if-srv)# bridge-domain 100
           

          Binds a service instance to a bridge domain instance.

           
          Step 15 cfm mip level level


          Example:
          Device(config-if-srv)#cfm mip level 4 
           

          Creates a MIP and sets the maintenance level number.

           
          Step 16 end


          Example:
          Device(config-if)# end
           

          Returns to privileged EXEC mode.

           
          Provisioning the Network on the N-PE A
          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    ethernet cfm domain domain-name level level-id

            4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

            5.    continuity-check

            6.    continuity-check [interval cc-interval]

            7.    exit

            8.    ethernet cfm global

            9.    ethernet cfm traceroute cache

            10.    ethernet cfm traceroute cache size entries

            11.    ethernet cfm traceroute cache hold-time minutes

            12.    interface type number

            13.    service instance id ethernet [evc-name]

            14.    encapsulation encapsulation-type

            15.    bridge-domain bridge-id

            16.    cfm mip level level

            17.    exit

            18.    exit

            19.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

            20.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

            21.    end


          DETAILED STEPS
              Command or Action Purpose
            Step 1 enable


            Example:
            Device> enable
             

            Enables privileged EXEC mode.

            • Enter your password if prompted.
             
            Step 2 configure terminal


            Example:
            Device# configure terminal
             

            Enters global configuration mode.

             
            Step 3 ethernet cfm domain domain-name level level-id


            Example:
            Device(config)# ethernet cfm domain Customer level 7
             

            Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

             
            Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


            Example:
            Device(config-ecfm)# service s41 evc 41 vlan 41 
             

            Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

             
            Step 5 continuity-check


            Example:
            Device(config-ecfm-srv)# continuity-check 
             

            Configures the transmission of continuity check messages (CCMs).

             
            Step 6 continuity-check [interval cc-interval]


            Example:
            Device(config-ecfm-srv)# continuity-check interval 10s
             

            Configures the per-service parameters and sets the interval at which CCMs are transmitted.

             
            Step 7 exit


            Example:
            Device(config-ecfm-srv)# exit
             

            Returns to Ethernet connectivity fault management configuration mode.

             
            Step 8 ethernet cfm global


            Example:
            Device(config)# ethernet cfm global
             

            Enables CFM processing globally on the device.

             
            Step 9 ethernet cfm traceroute cache


            Example:
            Device(config)# ethernet cfm traceroute cache
             

            Enables caching of CFM data learned through traceroute messages.

             
            Step 10 ethernet cfm traceroute cache size entries


            Example:
            Device(config)# ethernet cfm traceroute cache size 200
             

            Sets the maximum size for the CFM traceroute cache table.

             
            Step 11 ethernet cfm traceroute cache hold-time minutes


            Example:
            Device(config)# ethernet cfm traceroute cache hold-time 60
             

            Sets the amount of time that CFM traceroute cache entries are retained.

             
            Step 12 interface type number


            Example:
            Device(config)# interface gigabitethernet3/0
             

            Specifies an interface and enters interface configuration mode.

             
            Step 13 service instance id ethernet [evc-name]


            Example:
            Device(config-if)# service instance 333 ethernet evc1 
             

            Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

             
            Step 14 encapsulation encapsulation-type


            Example:
            Device(config-if-srv)# encapsulation ppp
             

            Sets the encapsulation method used by the interface.

             
            Step 15 bridge-domain bridge-id


            Example:
            Device(config-if-srv)# bridge-domain 100
             

            Binds a service instance to a bridge domain instance.

             
            Step 16 cfm mip level level


            Example:
            Device(config-if-srv)#cfm mip level 4 
             

            Creates a MIP and sets the maintenance level number.

             
            Step 17 exit


            Example:
            Device(config-if-srv)# exit
             

            Returns to interface configuration mode.

             
            Step 18 exit


            Example:
            Device(config-if)# exit
             

            Returns to global configuration mode.

             
            Step 19 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


            Example:
            Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
             

            Enables SNMP trap generation for Ethernet CFM mep-up, mep-down, config, loop, and cross-connect events.

             
            Step 20 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


            Example:
            Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
             

            Enables SNMP trap generation for Ethernet CFM mep-unknown, mep-missing, and service-up continuity check events in relation to the cross-check operation between statically configured MEPs and those learned via CCMs.

             
            Step 21 end


            Example:
            Device(config)# end
             

            Returns to privileged EXEC mode.

             
            Provisioning the Network on the CE-B
            SUMMARY STEPS

              1.    enable

              2.    configure terminal

              3.    ethernet cfm domain domain-name level level-id

              4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

              5.    continuity-check

              6.    continuity-check [interval cc-interval]

              7.    exit

              8.    mep archive-hold-time minutes

              9.    exit

              10.    ethernet cfm global

              11.    ethernet cfm traceroute cache

              12.    ethernet cfm traceroute cache size entries

              13.    ethernet cfm traceroute cache hold-time minutes

              14.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

              15.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

              16.    end


            DETAILED STEPS
                Command or Action Purpose
              Step 1 enable


              Example:
              Device> enable
               

              Enables privileged EXEC mode.

              • Enter your password if prompted.
               
              Step 2 configure terminal


              Example:
              Device# configure terminal
               

              Enters global configuration mode.

               
              Step 3 ethernet cfm domain domain-name level level-id


              Example:
              Device(config)# ethernet cfm domain Customer level 7
               

              Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

               
              Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


              Example:
              Device(config-ecfm)# service s41 evc 41 vlan 41 
               

              Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

               
              Step 5 continuity-check


              Example:
              Device(config-ecfm-srv)# continuity-check 
               

              Configures the transmission of continuity check messages (CCMs).

               
              Step 6 continuity-check [interval cc-interval]


              Example:
              Device(config-ecfm-srv)# continuity-check interval 10s
               

              Configures the per-service parameters and sets the interval at which CCMs are transmitted.

               
              Step 7 exit


              Example:
              Device(config-ecfm-srv)# exit
               

              Returns to Ethernet connectivity fault management configuration mode.

               
              Step 8 mep archive-hold-time minutes


              Example:
              Device(config-ecfm)# mep archive-hold-time 60
               

              Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

               
              Step 9 exit


              Example:
              Device(config-ecfm)# exit
               

              Returns to global configuration mode.

               
              Step 10 ethernet cfm global


              Example:
              Device(config)# ethernet cfm global
               

              Enables CFM processing globally on the device.

               
              Step 11 ethernet cfm traceroute cache


              Example:
              Device(config)# ethernet cfm traceroute cache
               

              Enables caching of CFM data learned through traceroute messages.

               
              Step 12 ethernet cfm traceroute cache size entries


              Example:
              Device(config)# ethernet cfm traceroute cache size 200
               

              Sets the maximum size for the CFM traceroute cache table.

               
              Step 13 ethernet cfm traceroute cache hold-time minutes


              Example:
              Device(config)# ethernet cfm traceroute cache hold-time 60
               

              Sets the amount of time that CFM traceroute cache entries are retained.

               
              Step 14 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


              Example:
              Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
               

              Enables SNMP trap generation for Ethernet CFM mep-up, mep-down, config, loop, and cross-connect events.

               
              Step 15 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


              Example:
              Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
               

              Enables SNMP trap generation for Ethernet CFM mep-unknown, mep-missing, and service-up continuity check events in relation to the cross-check operation between statically configured MEPs and those learned via CCMs.

               
              Step 16 end


              Example:
              Device(config)# end#
               

              Returns to privileged EXEC mode.

               
              Provisioning the Network on the U-PE B
              SUMMARY STEPS

                1.    enable

                2.    configure terminal

                3.    ethernet cfm domain domain-name level level-id

                4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                5.    continuity-check

                6.    continuity-check [interval cc-interval]

                7.    exit

                8.    mep archive-hold-time minutes

                9.    exit

                10.    ethernet cfm global

                11.    ethernet cfm traceroute cache

                12.    ethernet cfm traceroute cache size entries

                13.    ethernet cfm traceroute cache hold-time minutes

                14.    interface type number

                15.    service instance id ethernet [evc-name]

                16.    encapsulation encapsulation-type

                17.    bridge-domain bridge-id

                18.    cfm mip level level

                19.    exit

                20.    exit

                21.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

                22.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

                23.    end


              DETAILED STEPS
                  Command or Action Purpose
                Step 1 enable


                Example:
                Device> enable
                 

                Enables privileged EXEC mode.

                • Enter your password if prompted.
                 
                Step 2 configure terminal


                Example:
                Device# configure terminal
                 

                Enters global configuration mode.

                 
                Step 3 ethernet cfm domain domain-name level level-id


                Example:
                Device(config)# ethernet cfm domain Customer level 7
                 

                Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                 
                Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                Example:
                Device(config-ecfm)# service s41 evc 41 vlan 41 
                 

                Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                 
                Step 5 continuity-check


                Example:
                Device(config-ecfm-srv)# continuity-check 
                 

                Configures the transmission of continuity check messages (CCMs).

                 
                Step 6 continuity-check [interval cc-interval]


                Example:
                Device(config-ecfm-srv)# continuity-check interval 10s
                 

                Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                 
                Step 7 exit


                Example:
                Device(config-ecfm-srv)# exit
                 

                Returns to Ethernet connectivity fault management configuration mode.

                 
                Step 8 mep archive-hold-time minutes


                Example:
                Device(config-ecfm)# mep archive-hold-time 60
                 

                Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                 
                Step 9 exit


                Example:
                Device(config-ecfm)# exit
                 

                Returns to global configuration mode.

                 
                Step 10 ethernet cfm global


                Example:
                Device(config)# ethernet cfm global
                 

                Enables CFM processing globally on the device.

                 
                Step 11 ethernet cfm traceroute cache


                Example:
                Device(config)# ethernet cfm traceroute cache
                 

                Enables caching of CFM data learned through traceroute messages.

                 
                Step 12 ethernet cfm traceroute cache size entries


                Example:
                Device(config)# ethernet cfm traceroute cache size 200
                 

                Sets the maximum size for the CFM traceroute cache table.

                 
                Step 13 ethernet cfm traceroute cache hold-time minutes


                Example:
                Device(config)# ethernet cfm traceroute cache hold-time 60
                 

                Sets the amount of time that CFM traceroute cache entries are retained.

                 
                Step 14 interface type number


                Example:
                Device(config)# interface gigabitethernet2/0
                 

                Specifies an interface and enters interface configuration mode.

                 
                Step 15 service instance id ethernet [evc-name]


                Example:
                Device(config-if)# service instance 333 ethernet evc1 
                 

                Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                 
                Step 16 encapsulation encapsulation-type


                Example:
                Device(config-if-srv)# encapsulation ppp
                 

                Sets the encapsulation method used by the interface.

                 
                Step 17 bridge-domain bridge-id


                Example:
                Device(config-if-srv)# bridge-domain 100
                 

                Binds a service instance to a bridge domain instance.

                 
                Step 18 cfm mip level level


                Example:
                Device(config-if-srv)#cfm mip level 4 
                 

                Creates a MIP and sets the maintenance level number.

                 
                Step 19 exit


                Example:
                Device(config-if-srv)# exit
                 

                Returns to interface configuration mode.

                 
                Step 20 exit


                Example:
                Device(config-if)# exit
                 

                Returns to global configuration mode.

                 
                Step 21 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


                Example:
                Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
                 

                Enables SNMP trap generation for Ethernet CFM mep-up, mep-down, config, loop, and cross-connect events.

                 
                Step 22 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


                Example:
                Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
                 

                Enables SNMP trap generation for Ethernet CFM mep-unknown, mep-missing, and service-up continuity check events in relation to the cross-check operation between statically configured MEPs and those learned via CCMs.

                 
                Step 23 end


                Example:
                Device(config)# end
                 

                Returns to privileged EXEC mode.

                 
                Provisioning the Network on the PE-AGG B
                SUMMARY STEPS

                  1.    enable

                  2.    configure terminal

                  3.    ethernet cfm domain domain-name level level-id

                  4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                  5.    continuity-check

                  6.    continuity-check [interval cc-interval]

                  7.    exit

                  8.    mep archive-hold-time minutes

                  9.    exit

                  10.    ethernet cfm global

                  11.    interface type number

                  12.    service instance id ethernet [evc-name]

                  13.    encapsulation encapsulation-type

                  14.    bridge-domain bridge-id

                  15.    cfm mip level level

                  16.    end


                DETAILED STEPS
                    Command or Action Purpose
                  Step 1 enable


                  Example:
                  Device> enable
                   

                  Enables privileged EXEC mode.

                  • Enter your password if prompted.
                   
                  Step 2 configure terminal


                  Example:
                  Device# configure terminal
                   

                  Enters global configuration mode.

                   
                  Step 3 ethernet cfm domain domain-name level level-id


                  Example:
                  Device(config)# ethernet cfm domain Customer level 7
                   

                  Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                   
                  Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                  Example:
                  Device(config-ecfm)# service s41 evc 41 vlan 41 
                   

                  Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                   
                  Step 5 continuity-check


                  Example:
                  Device(config-ecfm-srv)# continuity-check 
                   

                  Configures the transmission of continuity check messages (CCMs).

                   
                  Step 6 continuity-check [interval cc-interval]


                  Example:
                  Device(config-ecfm-srv)# continuity-check interval 10s
                   

                  Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                   
                  Step 7 exit


                  Example:
                  Device(config-ecfm-srv)# exit
                   

                  Returns to Ethernet connectivity fault management configuration mode.

                   
                  Step 8 mep archive-hold-time minutes


                  Example:
                  Device(config-ecfm)# mep archive-hold-time 65
                   

                  Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                   
                  Step 9 exit


                  Example:
                  Device(config-ecfm)# exit
                   

                  Returns to global configuration mode.

                   
                  Step 10 ethernet cfm global


                  Example:
                  Device(config)# ethernet cfm global
                   

                  Enables CFM processing globally on the device.

                   
                  Step 11 interface type number


                  Example:
                  Device(config)# interface gigabitethernet1/1
                   

                  Specifies an interface and enters interface configuration mode.

                   
                  Step 12 service instance id ethernet [evc-name]


                  Example:
                  Device(config-if)# service instance 333 ethernet evc1 
                   

                  Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                   
                  Step 13 encapsulation encapsulation-type


                  Example:
                  Device(config-if-srv)# encapsulation ppp
                   

                  Sets the encapsulation method used by the interface.

                   
                  Step 14 bridge-domain bridge-id


                  Example:
                  Device(config-if-srv)# bridge-domain 100
                   

                  Binds a service instance to a bridge domain instance.

                   
                  Step 15 cfm mip level level


                  Example:
                  Device(config-if-srv)#cfm mip level 4 
                   

                  Creates a MIP and sets the maintenance level number.

                   
                  Step 16 end


                  Example:
                  Device(config-if-srv)# end
                   

                  Returns to privileged EXEC mode.

                   
                  Provisioning the Network on the N-PE B
                  SUMMARY STEPS

                    1.    enable

                    2.    configure terminal

                    3.    ethernet cfm domain domain-name level level-id

                    4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                    5.    continuity-check

                    6.    continuity-check [interval cc-interval]

                    7.    exit

                    8.    mep archive-hold-time minutes

                    9.    exit

                    10.    ethernet cfm global

                    11.    ethernet cfm traceroute cache

                    12.    ethernet cfm traceroute cache size entries

                    13.    ethernet cfm traceroute cache hold-time minutes

                    14.    interface type number

                    15.    service instance id ethernet [evc-name]

                    16.    encapsulation encapsulation-type

                    17.    bridge-domain bridge-id

                    18.    cfm mip level level

                    19.    exit

                    20.    exit

                    21.    snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]

                    22.    snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]

                    23.    end


                  DETAILED STEPS
                      Command or Action Purpose
                    Step 1 enable


                    Example:
                    Device> enable
                     

                    Enables privileged EXEC mode.

                    • Enter your password if prompted.
                     
                    Step 2 configure terminal


                    Example:
                    Device# configure terminal
                     

                    Enters global configuration mode.

                     
                    Step 3 ethernet cfm domain domain-name level level-id


                    Example:
                    Device(config)# ethernet cfm domain Customer level 7
                     

                    Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                     
                    Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                    Example:
                    Device(config-ecfm)# service s41 evc 41 vlan 41 
                     

                    Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                     
                    Step 5 continuity-check


                    Example:
                    Device(config-ecfm-srv)# continuity-check 
                     

                    Configures the transmission of continuity check messages (CCMs).

                     
                    Step 6 continuity-check [interval cc-interval]


                    Example:
                    Device(config-ecfm-srv)# continuity-check interval 10s
                     

                    Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                     
                    Step 7 exit


                    Example:
                    Device(config-ecfm-srv)# exit
                     

                    Returns to Ethernet connectivity fault management configuration mode.

                     
                    Step 8 mep archive-hold-time minutes


                    Example:
                    Device(config-ecfm)# mep archive-hold-time 60
                     

                    Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                     
                    Step 9 exit


                    Example:
                    Device(config-ecfm)# exit
                     

                    Returns to global configuration mode.

                     
                    Step 10 ethernet cfm global


                    Example:
                    Device(config)# ethernet cfm global
                     

                    Enables CFM processing globally on the device.

                     
                    Step 11 ethernet cfm traceroute cache


                    Example:
                    Device(config)# ethernet cfm traceroute cache
                     

                    Enables caching of CFM data learned through traceroute messages.

                     
                    Step 12 ethernet cfm traceroute cache size entries


                    Example:
                    Device(config)# ethernet cfm traceroute cache size 200
                     

                    Sets the maximum size for the CFM traceroute cache table.

                     
                    Step 13 ethernet cfm traceroute cache hold-time minutes


                    Example:
                    Device(config)# ethernet cfm traceroute cache hold-time 60
                     

                    Sets the amount of time that CFM traceroute cache entries are retained.

                     
                    Step 14 interface type number


                    Example:
                    Device(config)# interface gigabitethernet1/2
                     

                    Specifies an interface and enters interface configuration mode.

                     
                    Step 15 service instance id ethernet [evc-name]


                    Example:
                    Device(config-if)# service instance 333 ethernet evc1 
                     

                    Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                     
                    Step 16 encapsulation encapsulation-type


                    Example:
                    Device(config-if-srv)# encapsulation ppp
                     

                    Sets the encapsulation method used by the interface.

                     
                    Step 17 bridge-domain bridge-id


                    Example:
                    Device(config-if-srv)# bridge-domain 100
                     

                    Binds a service instance to a bridge domain instance.

                     
                    Step 18 cfm mip level level


                    Example:
                    Device(config-if-srv)#cfm mip level 4 
                     

                    Creates a MIP and sets the maintenance level number.

                     
                    Step 19 exit


                    Example:
                    Device(config-if-srv)# exit
                     

                    Returns to interface configuration mode.

                     
                    Step 20 exit


                    Example:
                    Device(config-if)# exit
                     

                    Returns to global configuration mode.

                     
                    Step 21 snmp-server enable traps ethernet cfm cc [mep-up] [mep-down] [config] [loop] [cross-connect]


                    Example:
                    Device(config)# snmp-server enable traps ethernet cfm cc mep-up mep-down config loop cross-connect 
                     

                    Enables SNMP trap generation for Ethernet CFM mep-up, mep-down, config, loop, and cross-connect events.

                     
                    Step 22 snmp-server enable traps ethernet cfm crosscheck [mep-unknown | mep-missing | service-up]


                    Example:
                    Device(config)# snmp-server enable traps ethernet cfm crosscheck mep-unknown mep-missing service-up 
                     

                    Enables SNMP trap generation for Ethernet CFM mep-unknown, mep-missing, and service-up continuity check events in relation to the cross-check operation between statically configured MEPs and those learned via CCMs.

                     
                    Step 23 end


                    Example:
                    Device(config)# end
                     

                    Returns to privileged EXEC mode.

                     

                    Provisioning Service

                    Provisioning Service on the CE-A

                    Perform this task to set up service for Ethernet CFM. Optionally, when this task is completed, you may configure and enable the cross-check function. To perform this optional task, see “Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A”.

                    SUMMARY STEPS

                      1.    enable

                      2.    configure terminal

                      3.    ethernet cfm domain domain-name level level-id

                      4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                      5.    continuity-check

                      6.    continuity-check [interval cc-interval]

                      7.    exit

                      8.    mep archive-hold-time minutes

                      9.    exit

                      10.    ethernet cfm global

                      11.    ethernet cfm traceroute cache

                      12.    ethernet cfm traceroute cache size entries

                      13.    ethernet cfm traceroute cache hold-time minutes

                      14.    interface type number

                      15.    service instance id ethernet [evc-name]

                      16.    encapsulation encapsulation-type

                      17.    bridge-domain bridge-id

                      18.    cfm mep domain domain-name mpid id

                      19.    end


                    DETAILED STEPS
                        Command or Action Purpose
                      Step 1 enable


                      Example:
                      Device> enable
                       

                      Enables privileged EXEC mode.

                      • Enter your password if prompted.
                       
                      Step 2 configure terminal


                      Example:
                      Device# configure terminal
                       

                      Enters global configuration mode.

                       
                      Step 3 ethernet cfm domain domain-name level level-id


                      Example:
                      Device(config)# ethernet cfm domain Customer level 7 
                       

                      Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                       
                      Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                      Example:
                      Device(config-ecfm)# service s41 evc 41 vlan 41 
                       

                      Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                       
                      Step 5 continuity-check


                      Example:
                      Device(config-ecfm-srv)# continuity-check 
                       

                      Configures the transmission of continuity check messages (CCMs).

                       
                      Step 6 continuity-check [interval cc-interval]


                      Example:
                      Device(config-ecfm-srv)# continuity-check interval 10s
                       

                      Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                       
                      Step 7 exit


                      Example:
                      Device(config-ecfm-srv)# exit
                       

                      Returns to Ethernet connectivity fault management configuration mode.

                       
                      Step 8 mep archive-hold-time minutes


                      Example:
                      Device(config-ecfm)# mep archive-hold-time 60
                       

                      Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                       
                      Step 9 exit


                      Example:
                      Device(config-ecfm)# exit
                       

                      Returns to global configuration mode.

                       
                      Step 10 ethernet cfm global


                      Example:
                      Device(config)# ethernet cfm global
                       

                      Enables CFM processing globally on the device.

                       
                      Step 11 ethernet cfm traceroute cache


                      Example:
                      Device(config)# ethernet cfm traceroute cache
                       

                      Enables caching of CFM data learned through traceroute messages.

                       
                      Step 12 ethernet cfm traceroute cache size entries


                      Example:
                      Device(config)# ethernet cfm traceroute cache size 200
                       

                      Sets the maximum size for the CFM traceroute cache table.

                       
                      Step 13 ethernet cfm traceroute cache hold-time minutes


                      Example:
                      Device(config)# ethernet cfm traceroute cache hold-time 60
                       

                      Sets the amount of time that CFM traceroute cache entries are retained.

                       
                      Step 14 interface type number


                      Example:
                      Device(config)# interface ethernet 0/3
                       

                      Specifies an interface and enters interface configuration mode.

                       
                      Step 15 service instance id ethernet [evc-name]


                      Example:
                      Device(config-if)# service instance 333 ethernet evc1 
                       

                      Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                       
                      Step 16 encapsulation encapsulation-type


                      Example:
                      Device(config-if-srv)# encapsulation ppp
                       

                      Sets the encapsulation method used by the interface.

                       
                      Step 17 bridge-domain bridge-id


                      Example:
                      Device(config-if-srv)# bridge-domain 100
                       

                      Binds a service instance to a bridge domain instance.

                       
                      Step 18 cfm mep domain domain-name mpid id


                      Example:
                      Device(config-if-srv)# cfm mep domain L4 mpid 4001
                       

                      Configures the MEP domain and the ID.

                       
                      Step 19 end


                      Example:
                      Device(config-if-srv)# end
                       

                      Returns to privileged EXEC mode.

                       
                      Provisioning Service on the U-PE A
                      SUMMARY STEPS

                        1.    enable

                        2.    configure terminal

                        3.    ethernet cfm domain domain-name level level-id

                        4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                        5.    continuity-check

                        6.    continuity-check [interval cc-interval]

                        7.    exit

                        8.    mep archive-hold-time minutes

                        9.    exit

                        10.    ethernet cfm global

                        11.    ethernet cfm traceroute cache

                        12.    ethernet cfm traceroute cache size entries

                        13.    ethernet cfm traceroute cache hold-time minutes

                        14.    interface type number

                        15.    service instance id ethernet [evc-name]

                        16.    encapsulation encapsulation-type

                        17.    bridge-domain bridge-id

                        18.    cfm mep domain domain-name mpid id

                        19.    exit

                        20.    exit

                        21.    interface type number

                        22.    service instance id ethernet [evc-name]

                        23.    encapsulation encapsulation-type

                        24.    bridge-domain bridge-id

                        25.    cfm mip level level

                        26.    end


                      DETAILED STEPS
                          Command or Action Purpose
                        Step 1 enable


                        Example:
                        Device> enable
                         

                        Enables privileged EXEC mode.

                        • Enter your password if prompted.
                         
                        Step 2 configure terminal


                        Example:
                        Device# configure terminal
                         

                        Enters global configuration mode.

                         
                        Step 3 ethernet cfm domain domain-name level level-id


                        Example:
                        Device(config)# ethernet cfm domain Customer level 7
                         

                        Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                         
                        Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                        Example:
                        Device(config-ecfm)# service s41 evc 41 vlan 41
                         

                        Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                         
                        Step 5 continuity-check


                        Example:
                        Device(config-ecfm-srv)# continuity-check
                         

                        Configures the transmission of continuity check messages (CCMs).

                         
                        Step 6 continuity-check [interval cc-interval]


                        Example:
                        Device(config-ecfm-srv)# continuity-check interval 10s
                         

                        Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                         
                        Step 7 exit


                        Example:
                        Device(config-ecfm-srv)# exit
                         

                        Returns to Ethernet connectivity fault management configuration mode.

                         
                        Step 8 mep archive-hold-time minutes


                        Example:
                        Device(config-ecfm)# mep archive-hold-time 60
                         

                        Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                         
                        Step 9 exit


                        Example:
                        Device(config-ecfm)# exit
                         

                        Returns to global configuration mode.

                         
                        Step 10 ethernet cfm global


                        Example:
                        Device(config)# ethernet cfm global
                         

                        Enables CFM processing globally on the device.

                         
                        Step 11 ethernet cfm traceroute cache


                        Example:
                        Device(config)# ethernet cfm traceroute cache
                         

                        Enables caching of CFM data learned through traceroute messages.

                         
                        Step 12 ethernet cfm traceroute cache size entries


                        Example:
                        Device(config)# ethernet cfm traceroute cache size 200
                         

                        Sets the maximum size for the CFM traceroute cache table.

                         
                        Step 13 ethernet cfm traceroute cache hold-time minutes


                        Example:
                        Device(config)# ethernet cfm traceroute cache hold-time 60
                         

                        Sets the amount of time that CFM traceroute cache entries are retained.

                         
                        Step 14 interface type number


                        Example:
                        Device(config)# interface gigabitethernet3/2
                         

                        Specifies an interface and enters interface configuration mode.

                         
                        Step 15 service instance id ethernet [evc-name]


                        Example:
                        Device(config-if)# service instance 333 ethernet evc1
                         

                        Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                         
                        Step 16 encapsulation encapsulation-type


                        Example:
                        Device(config-if-srv)# encapsulation ppp
                         

                        Sets the encapsulation method used by the interface.

                         
                        Step 17 bridge-domain bridge-id


                        Example:
                        Device(config-if-srv)# bridge-domain 100
                         

                        Binds a service instance to a bridge domain instance.

                         
                        Step 18 cfm mep domain domain-name mpid id


                        Example:
                        Device(config-if-srv)# cfm mep domain L4 mpid 4001
                         

                        Configures the MEP domain and the ID.

                         
                        Step 19 exit


                        Example:
                        Device(config-if-srv)# exit
                         

                        Returns to interface configuration mode.

                         
                        Step 20 exit


                        Example:
                        Device(config-if)# exit
                         

                        Returns to global configuration mode.

                         
                        Step 21 interface type number


                        Example:
                        Device(config)# interface gigabitethernet3/2
                         

                        Specifies an interface and enters interface configuration mode.

                         
                        Step 22 service instance id ethernet [evc-name]


                        Example:
                        Device(config-if)# service instance 333 ethernet evc1
                         

                        Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                         
                        Step 23 encapsulation encapsulation-type


                        Example:
                        Device(config-if-srv)# encapsulation ppp
                         

                        Sets the encapsulation method used by the interface.

                         
                        Step 24 bridge-domain bridge-id


                        Example:
                        Device(config-if-srv)# bridge-domain 100
                         

                        Binds a service instance to a bridge domain instance.

                         
                        Step 25 cfm mip level level


                        Example:
                        Device(config-if-srv)#cfm mip level 4
                         

                        Creates a MIP and sets the maintenance level number.

                         
                        Step 26 end


                        Example:
                        Device(config-if-srv)# end
                         

                        Returns to privileged EXEC mode.

                         
                        Provisioning Service on the PE-AGG A
                        SUMMARY STEPS

                          1.    enable

                          2.    configure terminal

                          3.    ethernet cfm domain domain-name level level-id

                          4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                          5.    continuity-check

                          6.    continuity-check [interval cc-interval]

                          7.    exit

                          8.    mep archive-hold-time minutes

                          9.    exit

                          10.    ethernet cfm global

                          11.    interface type number

                          12.    service instance id ethernet [evc-name]

                          13.    encapsulation encapsulation-type

                          14.    bridge-domain bridge-id

                          15.    cfm mip level level

                          16.    end


                        DETAILED STEPS
                            Command or Action Purpose
                          Step 1 enable


                          Example:
                          Device> enable
                           

                          Enables privileged EXEC mode.

                          • Enter your password if prompted.
                           
                          Step 2 configure terminal


                          Example:
                          Device# configure terminal
                           

                          Enters global configuration mode.

                           
                          Step 3 ethernet cfm domain domain-name level level-id


                          Example:
                          Device(config)# ethernet cfm domain Customer level 7
                           

                          Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                           
                          Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                          Example:
                          Device(config-ecfm)# service s41 evc 41 vlan 41 
                           

                          Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                           
                          Step 5 continuity-check


                          Example:
                          Device(config-ecfm-srv)# continuity-check 
                           

                          Configures the transmission of continuity check messages (CCMs).

                           
                          Step 6 continuity-check [interval cc-interval]


                          Example:
                          Device(config-ecfm-srv)# continuity-check interval 10s
                           

                          Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                           
                          Step 7 exit


                          Example:
                          Device(config-ecfm-srv)# exit
                           

                          Returns to Ethernet connectivity fault management configuration mode.

                           
                          Step 8 mep archive-hold-time minutes


                          Example:
                          Device(config-ecfm)# mep archive-hold-time 65
                           

                          Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                           
                          Step 9 exit


                          Example:
                          Device(config-ecfm)# exit
                           

                          Returns to global configuration mode.

                           
                          Step 10 ethernet cfm global


                          Example:
                          Device(config)# ethernet cfm global
                           

                          Enables CFM processing globally on the device.

                           
                          Step 11 interface type number


                          Example:
                          Device(config)# interface gigabitethernet3/1
                           

                          Specifies an interface and enters interface configuration mode.

                           
                          Step 12 service instance id ethernet [evc-name]


                          Example:
                          Device(config-if)# service instance 333 ethernet evc1 
                           

                          Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                           
                          Step 13 encapsulation encapsulation-type


                          Example:
                          Device(config-if-srv)# encapsulation ppp
                           

                          Sets the encapsulation method used by the interface.

                           
                          Step 14 bridge-domain bridge-id


                          Example:
                          Device(config-if-srv)# bridge-domain 100
                           

                          Binds a service instance to a bridge domain instance.

                           
                          Step 15 cfm mip level level


                          Example:
                          Device(config-if-srv)#cfm mip level 4 
                           

                          Creates a MIP and sets the maintenance level number.

                           
                          Step 16 end


                          Example:
                          Device(config-if-srv)# end
                           

                          Returns to privileged EXEC mode.

                           
                          Provisioning Service on the N-PE A
                          SUMMARY STEPS

                            1.    enable

                            2.    configure terminal

                            3.    ethernet cfm domain domain-name level level-id

                            4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                            5.    continuity-check

                            6.    continuity-check [interval cc-interval]

                            7.    exit

                            8.    mep archive-hold-time minutes

                            9.    exit

                            10.    ethernet cfm global

                            11.    ethernet cfm traceroute cache

                            12.    ethernet cfm traceroute cache size entries

                            13.    ethernet cfm traceroute cache hold-time minutes

                            14.    interface type number

                            15.    service instance id ethernet [evc-name]

                            16.    encapsulation encapsulation-type

                            17.    bridge-domain bridge-id

                            18.    cfm mip level level

                            19.    exit

                            20.    exit

                            21.    interface type number

                            22.    service instance id ethernet [evc-name ]

                            23.    encapsulation encapsulation-type

                            24.    bridge-domain bridge-id

                            25.    cfm mep domain domain-name mpid id

                            26.    end


                          DETAILED STEPS
                              Command or Action Purpose
                            Step 1 enable


                            Example:
                            Device> enable
                             

                            Enables privileged EXEC mode.

                            • Enter your password if prompted.
                             
                            Step 2 configure terminal


                            Example:
                            Device# configure terminal
                             

                            Enters global configuration mode.

                             
                            Step 3 ethernet cfm domain domain-name level level-id


                            Example:
                            Device(config)# ethernet cfm domain Customer level 7
                             

                            Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                             
                            Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                            Example:
                            Device(config-ecfm)# service s41 evc 41 vlan 41 
                             

                            Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                             
                            Step 5 continuity-check


                            Example:
                            Device(config-ecfm-srv)# continuity-check 
                             

                            Configures the transmission of continuity check messages (CCMs).

                             
                            Step 6 continuity-check [interval cc-interval]


                            Example:
                            Device(config-ecfm-srv)# continuity-check interval 10s
                             

                            Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                             
                            Step 7 exit


                            Example:
                            Device(config-ecfm-srv)# exit
                             

                            Returns to Ethernet connectivity fault management configuration mode.

                             
                            Step 8 mep archive-hold-time minutes


                            Example:
                            Device(config-ecfm)# mep archive-hold-time 60
                             

                            Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                             
                            Step 9 exit


                            Example:
                            Device(config-ecfm)# exit
                             

                            Returns to global configuration mode.

                             
                            Step 10 ethernet cfm global


                            Example:
                            Device(config)# ethernet cfm global
                             

                            Enables CFM processing globally on the device.

                             
                            Step 11 ethernet cfm traceroute cache


                            Example:
                            Device(config)# ethernet cfm traceroute cache
                             

                            Enables caching of CFM data learned through traceroute messages.

                             
                            Step 12 ethernet cfm traceroute cache size entries


                            Example:
                            Device(config)# ethernet cfm traceroute cache size 200
                             

                            Sets the maximum size for the CFM traceroute cache table.

                             
                            Step 13 ethernet cfm traceroute cache hold-time minutes


                            Example:
                            Device(config)# ethernet cfm traceroute cache hold-time 60
                             

                            Sets the amount of time that CFM traceroute cache entries are retained.

                             
                            Step 14 interface type number


                            Example:
                            Device(config)# interface gigabitethernet3/0
                             

                            Specifies an interface and enters interface configuration mode.

                             
                            Step 15 service instance id ethernet [evc-name]


                            Example:
                            Device(config-if)# service instance 333 ethernet evc1 
                             

                            Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                             
                            Step 16 encapsulation encapsulation-type


                            Example:
                            Device(config-if-srv)# encapsulation ppp
                             

                            Sets the encapsulation method used by the interface.

                             
                            Step 17 bridge-domain bridge-id


                            Example:
                            Device(config-if-srv)# bridge-domain 100
                             

                            Binds a service instance to a bridge domain instance.

                             
                            Step 18 cfm mip level level


                            Example:
                            Device(config-if-srv)#cfm mip level 4 
                             

                            Creates a MIP and sets the maintenance level number.

                             
                            Step 19 exit


                            Example:
                            Device(config-if-srv)# exit
                             

                            Returns to interface configuration mode.

                             
                            Step 20 exit


                            Example:
                            Device(config-if)# exit
                             

                            Returns to global configuration mode.

                             
                            Step 21 interface type number


                            Example:
                            Device(config-if)# interface gigabitethernet4/0
                             

                            Specifies an interface.

                             
                            Step 22 service instance id ethernet [evc-name ]


                            Example:
                            Device(config-if)# service instance 333 ethernet evc1 
                             

                            Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                             
                            Step 23 encapsulation encapsulation-type


                            Example:
                            Device(config-if-srv)# encapsulation ppp
                             

                            Sets the encapsulation method used by the interface.

                             
                            Step 24 bridge-domain bridge-id


                            Example:
                            Device(config-if-srv)# bridge-domain 100
                             

                            Binds a service instance to a bridge domain instance.

                             
                            Step 25 cfm mep domain domain-name mpid id


                            Example:
                            Device(config-if-srv)# cfm mep domain L4 mpid 4001
                             

                            Configures the MEP domain and the ID.

                             
                            Step 26 end


                            Example:
                            Device(config-if-srv)# end
                             

                            Returns to privileged EXEC mode.

                             
                            Provisioning Service on the CE-B
                            SUMMARY STEPS

                              1.    enable

                              2.    configure terminal

                              3.    ethernet cfm domain domain-name level level-id

                              4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                              5.    continuity-check

                              6.    continuity-check [interval cc-interval]

                              7.    exit

                              8.    mep archive-hold-time minutes

                              9.    exit

                              10.    ethernet cfm global

                              11.    ethernet cfm traceroute cache

                              12.    ethernet cfm traceroute cache size entries

                              13.    ethernet cfm traceroute cache hold-time minutes

                              14.    interface type number

                              15.    service instance id ethernet [evc-name]

                              16.    encapsulation encapsulation-type

                              17.    bridge-domain bridge-id

                              18.    cfm mep domain domain-name mpid id

                              19.    end


                            DETAILED STEPS
                                Command or Action Purpose
                              Step 1 enable


                              Example:
                              Device> enable
                               

                              Enables privileged EXEC mode.

                              • Enter your password if prompted.
                               
                              Step 2 configure terminal


                              Example:
                              Device# configure terminal
                               

                              Enters global configuration mode.

                               
                              Step 3 ethernet cfm domain domain-name level level-id


                              Example:
                              Device(config)# ethernet cfm domain Customer level 7
                               

                              Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                               
                              Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                              Example:
                              Device(config-ecfm)# service s41 evc 41 vlan 41 
                               

                              Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                               
                              Step 5 continuity-check


                              Example:
                              Device(config-ecfm-srv)# continuity-check 
                               

                              Configures the transmission of continuity check messages (CCMs).

                               
                              Step 6 continuity-check [interval cc-interval]


                              Example:
                              Device(config-ecfm-srv)# continuity-check interval 10s
                               

                              Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                               
                              Step 7 exit


                              Example:
                              Device(config-ecfm-srv)# exit
                               

                              Returns to Ethernet connectivity fault management configuration mode.

                               
                              Step 8 mep archive-hold-time minutes


                              Example:
                              Device(config-ecfm)# mep archive-hold-time 60
                               

                              Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                               
                              Step 9 exit


                              Example:
                              Device(config-ecfm)# exit
                               

                              Returns to global configuration mode.

                               
                              Step 10 ethernet cfm global


                              Example:
                              Device(config)# ethernet cfm global
                               

                              Enables CFM processing globally on the device.

                               
                              Step 11 ethernet cfm traceroute cache


                              Example:
                              Device(config)# ethernet cfm traceroute cache
                               

                              Enables caching of CFM data learned through traceroute messages.

                               
                              Step 12 ethernet cfm traceroute cache size entries


                              Example:
                              Device(config)# ethernet cfm traceroute cache size 200
                               

                              Sets the maximum size for the CFM traceroute cache table.

                               
                              Step 13 ethernet cfm traceroute cache hold-time minutes


                              Example:
                              Device(config)# ethernet cfm traceroute cache hold-time 60
                               

                              Sets the amount of time that CFM traceroute cache entries are retained.

                               
                              Step 14 interface type number


                              Example:
                              Device(config)# interface ethernet 0/1
                               

                              Specifies an interface and enters interface configuration mode.

                               
                              Step 15 service instance id ethernet [evc-name]


                              Example:
                              Device(config-if)# service instance 333 ethernet evc1 
                               

                              Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                               
                              Step 16 encapsulation encapsulation-type


                              Example:
                              Device(config-if-srv)# encapsulation ppp
                               

                              Sets the encapsulation method used by the interface.

                               
                              Step 17 bridge-domain bridge-id


                              Example:
                              Device(config-if-srv)# bridge-domain 100
                               

                              Binds a service instance to a bridge domain instance.

                               
                              Step 18 cfm mep domain domain-name mpid id


                              Example:
                              Device(config-if-srv)# cfm mep domain L4 mpid 4001
                               

                              Configures the MEP domain and the ID.

                               
                              Step 19 end


                              Example:
                              Device(config-if-srv)# end
                               

                              Returns to privileged EXEC mode.

                               
                              Provisioning Service on the U-PE B
                              SUMMARY STEPS

                                1.    enable

                                2.    configure terminal

                                3.    ethernet cfm domain domain-name level level-id

                                4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                                5.    continuity-check

                                6.    continuity-check [interval cc-interval]

                                7.    exit

                                8.    mep archive-hold-time minutes

                                9.    exit

                                10.    ethernet cfm global

                                11.    ethernet cfm traceroute cache

                                12.    ethernet cfm traceroute cache size entries

                                13.    ethernet cfm traceroute cache hold-time minutes

                                14.    interface type number

                                15.    service instance id ethernet [evc-name]

                                16.    encapsulation encapsulation-type

                                17.    bridge-domain bridge-id

                                18.    cfm mip level level

                                19.    exit

                                20.    exit

                                21.    interface type number

                                22.    service instance id ethernet [evc-name]

                                23.    encapsulation encapsulation-type

                                24.    bridge-domain bridge-id

                                25.    cfm mep domain domain-name mpid id

                                26.    end


                              DETAILED STEPS
                                  Command or Action Purpose
                                Step 1 enable


                                Example:
                                Device> enable
                                 

                                Enables privileged EXEC mode.

                                • Enter your password if prompted.
                                 
                                Step 2 configure terminal


                                Example:
                                Device# configure terminal
                                 

                                Enters global configuration mode.

                                 
                                Step 3 ethernet cfm domain domain-name level level-id


                                Example:
                                Device(config)# ethernet cfm domain Customer level 7
                                 

                                Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                                 
                                Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                                Example:
                                Device(config-ecfm)# service s41 evc 41 vlan 41 
                                 

                                Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                                 
                                Step 5 continuity-check


                                Example:
                                Device(config-ecfm-srv)# continuity-check 
                                 

                                Configures the transmission of continuity check messages (CCMs).

                                 
                                Step 6 continuity-check [interval cc-interval]


                                Example:
                                Device(config-ecfm-srv)# continuity-check interval 10s
                                 

                                Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                                 
                                Step 7 exit


                                Example:
                                Device(config-ecfm-srv)# exit
                                 

                                Returns to Ethernet connectivity fault management configuration mode.

                                 
                                Step 8 mep archive-hold-time minutes


                                Example:
                                Device(config-ecfm)# mep archive-hold-time 60
                                 

                                Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                                 
                                Step 9 exit


                                Example:
                                Device(config-ecfm)# exit
                                 

                                Returns to global configuration mode.

                                 
                                Step 10 ethernet cfm global


                                Example:
                                Device(config)# ethernet cfm global
                                 

                                Enables CFM processing globally on the device.

                                 
                                Step 11 ethernet cfm traceroute cache


                                Example:
                                Device(config)# ethernet cfm traceroute cache
                                 

                                Enables caching of CFM data learned through traceroute messages.

                                 
                                Step 12 ethernet cfm traceroute cache size entries


                                Example:
                                Device(config)# ethernet cfm traceroute cache size 200
                                 

                                Sets the maximum size for the CFM traceroute cache table.

                                 
                                Step 13 ethernet cfm traceroute cache hold-time minutes


                                Example:
                                Device(config)# ethernet cfm traceroute cache hold-time 60
                                 

                                Sets the amount of time that CFM traceroute cache entries are retained.

                                 
                                Step 14 interface type number


                                Example:
                                Device(config)# interface gigabitethernet1/0
                                 

                                Specifies an interface and enters interface configuration mode.

                                 
                                Step 15 service instance id ethernet [evc-name]


                                Example:
                                Device(config-if)# service instance 333 ethernet evc1 
                                 

                                Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                                 
                                Step 16 encapsulation encapsulation-type


                                Example:
                                Device(config-if-srv)# encapsulation ppp
                                 

                                Sets the encapsulation method used by the interface.

                                 
                                Step 17 bridge-domain bridge-id


                                Example:
                                Device(config-if-srv)# bridge-domain 100
                                 

                                Binds a service instance to a bridge domain instance.

                                 
                                Step 18 cfm mip level level


                                Example:
                                Device(config-if-srv)#cfm mip level 4 
                                 

                                Creates a MIP and sets the maintenance level number.

                                 
                                Step 19 exit


                                Example:
                                Device(config-if-srv)# exit
                                 

                                Returns to interface configuration mode.

                                 
                                Step 20 exit


                                Example:
                                Device(config-if)# exit
                                 

                                Returns to global configuration mode.

                                 
                                Step 21 interface type number


                                Example:
                                Device(config)# interface gigabitethernet1/0
                                 

                                Specifies an interface and enters interface configuration mode.

                                 
                                Step 22 service instance id ethernet [evc-name]


                                Example:
                                Device(config-if)# service instance 333 ethernet evc1 
                                 

                                Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                                 
                                Step 23 encapsulation encapsulation-type


                                Example:
                                Device(config-if-srv)# encapsulation ppp
                                 

                                Sets the encapsulation method used by the interface.

                                 
                                Step 24 bridge-domain bridge-id


                                Example:
                                Device(config-if-srv)# bridge-domain 100
                                 

                                Binds a service instance to a bridge domain instance.

                                 
                                Step 25 cfm mep domain domain-name mpid id


                                Example:
                                Device(config-if-srv)# cfm mep domain L4 mpid 4001
                                 

                                Configures the MEP domain and the ID.

                                 
                                Step 26 end


                                Example:
                                Device(config-if-srv)# end
                                 

                                Returns to privileged EXEC mode.

                                 
                                Provisioning Service on the PE-AGG B
                                SUMMARY STEPS

                                  1.    enable

                                  2.    configure terminal

                                  3.    ethernet cfm domain domain-name level level-id

                                  4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                                  5.    continuity-check

                                  6.    continuity-check [interval cc-interval]

                                  7.    exit

                                  8.    mep archive-hold-time minutes

                                  9.    exit

                                  10.    ethernet cfm global

                                  11.    interface type number

                                  12.    service instance id ethernet [evc-name]

                                  13.    encapsulation encapsulation-type

                                  14.    bridge-domain bridge-id

                                  15.    cfm mip level level

                                  16.    end


                                DETAILED STEPS
                                    Command or Action Purpose
                                  Step 1 enable


                                  Example:
                                  Device> enable
                                   

                                  Enables privileged EXEC mode.

                                  • Enter your password if prompted.
                                   
                                  Step 2 configure terminal


                                  Example:
                                  Device# configure terminal
                                   

                                  Enters global configuration mode.

                                   
                                  Step 3 ethernet cfm domain domain-name level level-id


                                  Example:
                                  Device(config)# ethernet cfm domain Customer level 7
                                   

                                  Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                                   
                                  Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                                  Example:
                                  Device(config-ecfm)# service s41 evc 41 vlan 41 
                                   

                                  Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                                   
                                  Step 5 continuity-check


                                  Example:
                                  Device(config-ecfm-srv)# continuity-check 
                                   

                                  Configures the transmission of continuity check messages (CCMs).

                                   
                                  Step 6 continuity-check [interval cc-interval]


                                  Example:
                                  Device(config-ecfm-srv)# continuity-check interval 10s
                                   

                                  Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                                   
                                  Step 7 exit


                                  Example:
                                  Device(config-ecfm-srv)# exit
                                   

                                  Returns to Ethernet connectivity fault management configuration mode.

                                   
                                  Step 8 mep archive-hold-time minutes


                                  Example:
                                  Device(config-ecfm)# mep archive-hold-time 65
                                   

                                  Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                                   
                                  Step 9 exit


                                  Example:
                                  Device(config-ecfm)# exit
                                   

                                  Returns to global configuration mode.

                                   
                                  Step 10 ethernet cfm global


                                  Example:
                                  Device(config)# ethernet cfm global
                                   

                                  Enables CFM processing globally on the device.

                                   
                                  Step 11 interface type number


                                  Example:
                                  Device(config)# interface gigabitethernet3/1
                                   

                                  Specifies an interface and enters interface configuration mode.

                                   
                                  Step 12 service instance id ethernet [evc-name]


                                  Example:
                                  Device(config-if)# service instance 333 ethernet evc1 
                                   

                                  Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                                   
                                  Step 13 encapsulation encapsulation-type


                                  Example:
                                  Device(config-if-srv)# encapsulation ppp
                                   

                                  Sets the encapsulation method used by the interface.

                                   
                                  Step 14 bridge-domain bridge-id


                                  Example:
                                  Device(config-if-srv)# bridge-domain 100
                                   

                                  Binds a service instance to a bridge domain instance.

                                   
                                  Step 15 cfm mip level level


                                  Example:
                                  Device(config-if-srv)#cfm mip level 4 
                                   

                                  Creates a MIP and sets the maintenance level number.

                                   
                                  Step 16 end


                                  Example:
                                  Device(config-if-srv)# end
                                   

                                  Returns to privileged EXEC mode.

                                   
                                  Provisioning Service on the N-PE B
                                  SUMMARY STEPS

                                    1.    enable

                                    2.    configure terminal

                                    3.    ethernet cfm domain domain-name level level-id

                                    4.    service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}

                                    5.    continuity-check

                                    6.    continuity-check [interval cc-interval]

                                    7.    exit

                                    8.    mep archive-hold-time minutes

                                    9.    exit

                                    10.    ethernet cfm global

                                    11.    ethernet cfm traceroute cache

                                    12.    ethernet cfm traceroute cache size entries

                                    13.    ethernet cfm traceroute cache hold-time minutes

                                    14.    interface type number

                                    15.    service instance id ethernet [evc-name]

                                    16.    encapsulation encapsulation-type

                                    17.    bridge-domain bridge-id

                                    18.    cfm mip level level

                                    19.    exit

                                    20.    exit

                                    21.    interface type number

                                    22.    service instance id ethernet [evc-name]

                                    23.    encapsulation encapsulation-type

                                    24.    bridge-domain bridge-id

                                    25.    cfm mep domain domain-name mpid id

                                    26.    end


                                  DETAILED STEPS
                                      Command or Action Purpose
                                    Step 1 enable


                                    Example:
                                    Device> enable
                                     

                                    Enables privileged EXEC mode.

                                    • Enter your password if prompted.
                                     
                                    Step 2 configure terminal


                                    Example:
                                    Device# configure terminal
                                     

                                    Enters global configuration mode.

                                     
                                    Step 3 ethernet cfm domain domain-name level level-id


                                    Example:
                                    Device(config)# ethernet cfm domain Customer level 7
                                     

                                    Defines a CFM maintenance domain at a particular maintenance level and enters Ethernet CFM configuration mode.

                                     
                                    Step 4 service {short-ma-name | number MA-number | vlan-id primary-vlan-id | vpn-id vpn-id} {vlan vlan-id | port | evc evc-name} direction {up | down}


                                    Example:
                                    Device(config-ecfm)# service s41 evc 41 vlan 41 
                                     

                                    Configures a maintenance association within a maintenance domain and enters Ethernet connectivity fault management (CFM) service configuration mode.

                                     
                                    Step 5 continuity-check


                                    Example:
                                    Device(config-ecfm-srv)# continuity-check 
                                     

                                    Configures the transmission of continuity check messages (CCMs).

                                     
                                    Step 6 continuity-check [interval cc-interval]


                                    Example:
                                    Device(config-ecfm-srv)# continuity-check interval 10s
                                     

                                    Configures the per-service parameters and sets the interval at which CCMs are transmitted.

                                     
                                    Step 7 exit


                                    Example:
                                    Device(config-ecfm-srv)# exit
                                     

                                    Returns to Ethernet connectivity fault management configuration mode.

                                     
                                    Step 8 mep archive-hold-time minutes


                                    Example:
                                    Device(config-ecfm)# mep archive-hold-time 60
                                     

                                    Sets the amount of time that data from a missing MEP is kept in the continuity check database or that entries are held in the error database before they are purged.

                                     
                                    Step 9 exit


                                    Example:
                                    Device(config-ecfm)# exit
                                     

                                    Returns to global configuration mode.

                                     
                                    Step 10 ethernet cfm global


                                    Example:
                                    Device(config)# ethernet cfm global
                                     

                                    Enables CFM processing globally on the device.

                                     
                                    Step 11 ethernet cfm traceroute cache


                                    Example:
                                    Device(config)# ethernet cfm traceroute cache
                                     

                                    Enables caching of CFM data learned through traceroute messages.

                                     
                                    Step 12 ethernet cfm traceroute cache size entries


                                    Example:
                                    Device(config)# ethernet cfm traceroute cache size 200
                                     

                                    Sets the maximum size for the CFM traceroute cache table.

                                     
                                    Step 13 ethernet cfm traceroute cache hold-time minutes


                                    Example:
                                    Device(config)# ethernet cfm traceroute cache hold-time 60
                                     

                                    Sets the amount of time that CFM traceroute cache entries are retained.

                                     
                                    Step 14 interface type number


                                    Example:
                                    Device(config)# interface gigabitethernet3/0
                                     

                                    Specifies an interface and enters interface configuration mode.

                                     
                                    Step 15 service instance id ethernet [evc-name]


                                    Example:
                                    Device(config-if)# service instance 333 ethernet evc1 
                                     

                                    Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                                     
                                    Step 16 encapsulation encapsulation-type


                                    Example:
                                    Device(config-if-srv)# encapsulation ppp
                                     

                                    Sets the encapsulation method used by the interface.

                                     
                                    Step 17 bridge-domain bridge-id


                                    Example:
                                    Device(config-if-srv)# bridge-domain 100
                                     

                                    Binds a service instance to a bridge domain instance.

                                     
                                    Step 18 cfm mip level level


                                    Example:
                                    Device(config-if-srv)#cfm mip level 4 
                                     

                                    Creates a MIP and sets the maintenance level number.

                                     
                                    Step 19 exit


                                    Example:
                                    Device(config-if-srv)# exit
                                     

                                    Returns to interface configuration mode.

                                     
                                    Step 20 exit


                                    Example:
                                    Device(config-if)# exit
                                     

                                    Returns to global configuration mode.

                                     
                                    Step 21 interface type number


                                    Example:
                                    Device(config-if)# interface gigabitethernet4/0
                                     

                                    Specifies an interface.

                                     
                                    Step 22 service instance id ethernet [evc-name]


                                    Example:
                                    Device(config-if)# service instance 333 ethernet evc1 
                                     

                                    Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

                                     
                                    Step 23 encapsulation encapsulation-type


                                    Example:
                                    Device(config-if-srv)# encapsulation ppp
                                     

                                    Sets the encapsulation method used by the interface.

                                     
                                    Step 24 bridge-domain bridge-id


                                    Example:
                                    Device(config-if-srv)# bridge-domain 100
                                     

                                    Binds a service instance to a bridge domain instance.

                                     
                                    Step 25 cfm mep domain domain-name mpid id


                                    Example:
                                    Device(config-if-srv)# cfm mep domain L4 mpid 4001
                                     

                                    Configures the MEP domain and the ID.

                                     
                                    Step 26 end


                                    Example:
                                    Device(config-if-srv)# end
                                     

                                    Returns to privileged EXEC mode.

                                     

                                    Configuring and Enabling the Cross-Check Function

                                    Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A

                                    Perform this task to configure and enable cross-checking for an inward facing MEP. This task requires you to configure and enable cross-checking on two devices. This task is optional.

                                    SUMMARY STEPS

                                      1.    enable

                                      2.    configure terminal

                                      3.    ethernet cfm domain domain-name level level-id

                                      4.    mep crosscheck mpid id vlan vlan-id [mac mac-address]

                                      5.    exit

                                      6.    ethernet cfm mep crosscheck start-delay delay

                                      7.    exit

                                      8.    ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                    DETAILED STEPS
                                        Command or Action Purpose
                                      Step 1 enable


                                      Example:
                                      Device> enable
                                       

                                      Enables privileged EXEC mode.

                                      • Enter your password if prompted.
                                       
                                      Step 2 configure terminal


                                      Example:
                                      Device# configure terminal
                                       

                                      Enters global configuration mode.

                                       
                                      Step 3 ethernet cfm domain domain-name level level-id


                                      Example:
                                      Device(config)# ethernet cfm domain ServiceProvider level 4
                                       

                                      Defines a CFM domain at a specified level and enters Ethernet CFM configuration mode.

                                       
                                      Step 4 mep crosscheck mpid id vlan vlan-id [mac mac-address]


                                      Example:
                                      Device(config-ether-cfm)# mep crosscheck mpid 402 vlan 100
                                       

                                      Statically defines a remote MEP on a specified VLAN within the domain.

                                       
                                      Step 5 exit


                                      Example:
                                      Device(config-ether-cfm)# exit#
                                       

                                      Returns to global configuration mode.

                                       
                                      Step 6 ethernet cfm mep crosscheck start-delay delay


                                      Example:
                                      Device(config)# ethernet cfm mep crosscheck start-delay 60
                                       

                                      Configures the maximum amount of time that the device waits for remote MEPs to come up before the cross-check operation is started

                                       
                                      Step 7 exit


                                      Example:
                                      Device(config)# exit
                                       

                                      Returns to privileged EXEC mode.

                                       
                                      Step 8 ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                      Example:
                                      Device# ethernet cfm mep crosscheck enable level 4 vlan 100
                                       

                                      Enables cross-checking between remote MEPs in the domain and MEPs learned through CCMs.

                                       
                                      Example

                                      The following example configures cross-checking on an inward facing MEP (U-PE A):

                                      U-PE A
                                      ethernet cfm domain ServiceProvider level 4
                                      mep crosscheck mpid 402 vlan 100
                                      !
                                      ethernet cfm mep crosscheck start-delay 60 
                                      

                                      The following example enables cross-checking on an inward facing MEP (U-PE A):

                                      U-PE A
                                      U-PEA# ethernet cfm mep crosscheck enable level 4 vlan 100
                                      
                                      Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-B

                                      Perform this task to configure and enable cross-checking for an inward facing MEP. This task requires you to configure and enable cross-checking on two devices. This task is optional.

                                      SUMMARY STEPS

                                        1.    enable

                                        2.    configure terminal

                                        3.    ethernet cfm domain domain-name level level-id

                                        4.    mep crosscheck mpid id vlan vlan-id [mac mac-address]

                                        5.    exit

                                        6.    ethernet cfm mep crosscheck start-delay delay

                                        7.    exit

                                        8.    ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                      DETAILED STEPS
                                          Command or Action Purpose
                                        Step 1 enable


                                        Example:
                                        Device> enable
                                         

                                        Enables privileged EXEC mode.

                                        • Enter your password if prompted.
                                         
                                        Step 2 configure terminal


                                        Example:
                                        Device# configure terminal
                                         

                                        Enters global configuration mode.

                                         
                                        Step 3 ethernet cfm domain domain-name level level-id


                                        Example:
                                        Device(config)# ethernet cfm domain ServiceProvider level 4
                                         

                                        Defines a CFM domain at a specified level and enters Ethernet CFM configuration mode.

                                         
                                        Step 4 mep crosscheck mpid id vlan vlan-id [mac mac-address]


                                        Example:
                                        Device(config-ether-cfm)# mep crosscheck mpid 401 vlan 100
                                         

                                        Statically defines a remote MEP on a specified VLAN within the domain.

                                         
                                        Step 5 exit


                                        Example:
                                        Device(config-ether-cfm)# exit
                                         

                                        Returns to global configuration mode.

                                         
                                        Step 6 ethernet cfm mep crosscheck start-delay delay


                                        Example:
                                        Device(config)# ethernet cfm mep crosscheck start-delay 60
                                         

                                        Configures the maximum amount of time that the device waits for remote MEPs to come up before the cross-check operation is started.

                                         
                                        Step 7 exit


                                        Example:
                                        Device(config)# exit
                                         

                                        Returns to privileged EXEC mode.

                                         
                                        Step 8 ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                        Example:
                                        Device# ethernet cfm mep crosscheck enable level 4 vlan 100
                                         

                                        Enables cross-checking between MEPs.

                                         
                                        Example

                                        The following example configures cross-checking on an inward facing MEP (U-PE B)

                                        U-PE B
                                        ethernet cfm domain ServiceProvider level 4
                                        mep crosscheck mpid 401 vlan 100
                                        !
                                        ethernet cfm mep crosscheck start-delay 60

                                        The following example enables cross-checking on an inward facing MEP (U-PE B)

                                        U-PE B
                                        U-PEB# ethernet cfm mep crosscheck enable level 4 vlan 100
                                        
                                        Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-A
                                        SUMMARY STEPS

                                          1.    enable

                                          2.    configure terminal

                                          3.    ethernet cfm domain domain-name level level-id [direction outward]

                                          4.    mep crosscheck mpid id vlan vlan-id [mac mac-address]

                                          5.    exit

                                          6.    ethernet cfm mep crosscheck start-delay delay

                                          7.    exit

                                          8.    ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                        DETAILED STEPS
                                            Command or Action Purpose
                                          Step 1 enable


                                          Example:
                                          Device> enable
                                           

                                          Enables privileged EXEC mode.

                                          • Enter your password if prompted.
                                           
                                          Step 2 configure terminal


                                          Example:
                                          Device# configure terminal
                                           

                                          Enters global configuration mode.

                                           
                                          Step 3 ethernet cfm domain domain-name level level-id [direction outward]


                                          Example:
                                          Device(config)# ethernet cfm domain Customer level 7 direction outward
                                           

                                          Defines a CFM domain at a specified level and enters Ethernet CFM configuration mode.

                                           
                                          Step 4 mep crosscheck mpid id vlan vlan-id [mac mac-address]


                                          Example:
                                          Device(config-ether-cfm)# mep crosscheck mpid 702 vlan 100
                                           

                                          Statically defines a remote MEP with a specified ID, VLAN, and domain.

                                           
                                          Step 5 exit


                                          Example:
                                          Device(config-ether-cfm)# exit
                                           

                                          Returns to global configuration mode.

                                           
                                          Step 6 ethernet cfm mep crosscheck start-delay delay


                                          Example:
                                          Device(config)# ethernet cfm mep crosscheck start-delay 60
                                           

                                          Configures the maximum amount of time that the device waits for remote MEPs to come up before the cross-check operation is started.

                                           
                                          Step 7 exit


                                          Example:
                                          Device(config)# exit
                                           

                                          Returns to privileged EXEC mode.

                                           
                                          Step 8 ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                          Example:
                                          Device# ethernet cfm mep crosscheck enable level 7 vlan 100
                                           

                                          Enables cross-checking between MEPs.

                                           
                                          Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-B
                                          SUMMARY STEPS

                                            1.    enable

                                            2.    configure terminal

                                            3.    ethernet cfm domain domain-name level level-id [direction outward]

                                            4.    mep crosscheck mpid id vlan vlan-id [mac mac-address]

                                            5.    exit

                                            6.    ethernet cfm mep crosscheck start-delay delay

                                            7.    exit

                                            8.    ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                          DETAILED STEPS
                                              Command or Action Purpose
                                            Step 1 enable


                                            Example:
                                            Device> enable
                                             

                                            Enables privileged EXEC mode.

                                            • Enter your password if prompted.
                                             
                                            Step 2 configure terminal


                                            Example:
                                            Device# configure terminal
                                             

                                            Enters global configuration mode.

                                             
                                            Step 3 ethernet cfm domain domain-name level level-id [direction outward]


                                            Example:
                                            Device(config)# ethernet cfm domain Customer level 7 direction outward
                                             

                                            Defines an outward CFM domain at a specified level and enters Ethernet CFM configuration mode.

                                             
                                            Step 4 mep crosscheck mpid id vlan vlan-id [mac mac-address]


                                            Example:
                                            Device(config-ether-cfm)# mep crosscheck mpid 401 vlan 100
                                             

                                            Statically defines a remote MEP on a VLAN within a specified domain.

                                             
                                            Step 5 exit


                                            Example:
                                            Device(config-ether-cfm)# exit
                                             

                                            Returns to global configuration mode.

                                             
                                            Step 6 ethernet cfm mep crosscheck start-delay delay


                                            Example:
                                            Device(config)# ethernet cfm mep crosscheck start-delay 60
                                             

                                            Configures the maximum amount of time that the device waits for remote MEPs to come up before the cross-check operation is started.

                                             
                                            Step 7 exit


                                            Example:
                                            Device(config)# exit
                                             

                                            Returns to privileged EXEC mode.

                                             
                                            Step 8 ethernet cfm mep crosscheck {enable | disable} level {level-id | level-id-level-id [,level-id-level-id]} vlan {vlan-id | any | vlan-id-vlan-id [,vlan-id-vlan-id]}


                                            Example:
                                            Device# ethernet cfm mep crosscheck enable level 7 vlan 100
                                             

                                            Enables cross-checking between MEPs.

                                             

                                            Configuring CFM over Bridge Domains

                                            Perform this task to configure Ethernet CFM over bridge domains. This task is optional.

                                            SUMMARY STEPS

                                              1.    enable

                                              2.    configure terminal

                                              3.    ethernet cfm domain domain-name level level-id direction outward

                                              4.    service csi-id evc evc-name

                                              5.    exit

                                              6.    ethernet cfm domain domain-name level level-id

                                              7.    exit

                                              8.    ethernet cfm domain domain-name level level-id

                                              9.    service csi-id evc evc-name

                                              10.    mep crosscheck mpid id evc evc-name mac mac-address

                                              11.    exit

                                              12.    ethernet evc evc-name

                                              13.    exit

                                              14.    interface type number

                                              15.    no ip address

                                              16.    service instance id ethernet evc-id

                                              17.    encapsulation dot1q vlan-id

                                              18.    bridge-domain bridge-id

                                              19.    cfm mep domain domain-name outward mpid mpid-value

                                              20.    end

                                              21.    configure terminal

                                              22.    interface type name

                                              23.    no ip address

                                              24.    ethernet cfm mip level level-id

                                              25.    service instance id ethernet evc-id

                                              26.    encapsulation dot1q vlan-id

                                              27.    bridge-domain bridge-id

                                              28.    cfm mep domain domain-name inward mpid mpid-value

                                              29.    end

                                              30.    configure terminal

                                              31.    ethernet cfm cc enable level level-id evc evc-name

                                              32.    ethernet cfm cc level any evc evc-name interval seconds loss-threshold num-msgs

                                              33.    end


                                            DETAILED STEPS
                                                Command or Action Purpose
                                              Step 1 enable


                                              Example:
                                              Device> enable
                                               

                                              Enables privileged EXEC mode.

                                              • Enter your password if prompted.
                                               
                                              Step 2 configure terminal


                                              Example:
                                              Device# configure terminal
                                               

                                              Enters global configuration mode.

                                               
                                              Step 3 ethernet cfm domain domain-name level level-id direction outward


                                              Example:
                                              Device(config)# ethernet cfm domain CUSTOMER level 7 direction outward
                                               

                                              Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode.

                                               
                                              Step 4 service csi-id evc evc-name


                                              Example:
                                              Device(config-ether-cfm)# service customer_100 evc evc_100
                                               

                                              Sets a universally unique ID for a CSI within a maintenance domain.

                                               
                                              Step 5 exit


                                              Example:
                                              Device(config-ether-cfm)# exit
                                               

                                              Returns to global configuration mode.

                                               
                                              Step 6 ethernet cfm domain domain-name level level-id


                                              Example:
                                              Device(config)# ethernet cfm domain MIP level 7
                                               

                                              Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode.

                                               
                                              Step 7 exit


                                              Example:
                                              Device(config-ether-cfm)# exit
                                               

                                              Returns to global configuration mode.

                                               
                                              Step 8 ethernet cfm domain domain-name level level-id


                                              Example:
                                              Device(config)# ethernet cfm domain PROVIDER level 4
                                               

                                              Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode.

                                               
                                              Step 9 service csi-id evc evc-name


                                              Example:
                                              Device(config-ether-cfm)# service provider_1 evc evc_100
                                               

                                              Sets a universally unique ID for a CSI within a maintenance domain.

                                               
                                              Step 10 mep crosscheck mpid id evc evc-name mac mac-address


                                              Example:
                                              Device(config-ether-cfm)# mep crosscheck mpid 200 evc evc_100 mac 1010.1010.1010
                                               

                                              Statically defines a remote MEP within a maintenance domain.

                                               
                                              Step 11 exit


                                              Example:
                                              Device(config-ether-cfm)# exit
                                               

                                              Returns to global configuration mode.

                                               
                                              Step 12 ethernet evc evc-name


                                              Example:
                                              Device(config)# ethernet evc evc_100
                                               

                                              Defines an EVC and enters EVC configuration mode.

                                               
                                              Step 13 exit


                                              Example:
                                              Device(config-evc)# exit
                                               

                                              Returns to global configuration mode.

                                               
                                              Step 14 interface type number


                                              Example:
                                              Device(config)# interface Ethernet 1/0
                                               

                                              Specifies an interface and enters interface configuration mode.

                                               
                                              Step 15 no ip address


                                              Example:
                                              Device(config-if)# no ip address
                                               

                                              Disables IP processing.

                                               
                                              Step 16 service instance id ethernet evc-id


                                              Example:
                                              Device(config-if)# service instance 100 ethernet evc_100
                                               

                                              Specifies an Ethernet service instance on an interface and enters service instance configuration mode.

                                               
                                              Step 17 encapsulation dot1q vlan-id


                                              Example:
                                              Device(config-if-srv)# encapsulation dot1q 100
                                               

                                              Defines the matching criteria to map 802.1Q frames on an ingress interface to the appropriate service instance.

                                               
                                              Step 18 bridge-domain bridge-id


                                              Example:
                                              Device(config-if-srv)# bridge-domain 100
                                               

                                              Establishes a bridge domain.

                                               
                                              Step 19 cfm mep domain domain-name outward mpid mpid-value


                                              Example:
                                              Device(config-if-srv)# cfm mep domain CUSTOMER outward mpid 1001
                                               

                                              Configures a MEP for a domain.

                                               
                                              Step 20 end


                                              Example:
                                              Device(config-if-srv)# end
                                               

                                              Returns to privileged EXEC mode.

                                               
                                              Step 21 configure terminal


                                              Example:
                                              Device# configure terminal
                                               

                                              Enters global configuration mode.

                                               
                                              Step 22 interface type name


                                              Example:
                                              Device(config)# interface Ethernet 1/1
                                               

                                              Specifies an interface and enters interface configuration mode.

                                               
                                              Step 23 no ip address


                                              Example:
                                              Device(config-if)# no ip address
                                               

                                              Disables IP processing.

                                               
                                              Step 24 ethernet cfm mip level level-id


                                              Example:
                                              Device(config-if)# ethernet cfm mip level 7
                                               

                                              Provisions a MIP at a specified maintenance level on an interface.

                                               
                                              Step 25 service instance id ethernet evc-id


                                              Example:
                                              Device(config-if)# service instance 100 ethernet evc_100
                                               

                                              Configures an Ethernet service instance on an interface and enters service instance configuration mode.

                                               
                                              Step 26 encapsulation dot1q vlan-id


                                              Example:
                                              Device(config-if-srv)# encapsulation dot1q 100
                                               

                                              Defines the matching criteria to map 802.1Q frames on an ingress interface to the appropriate service instance.

                                               
                                              Step 27 bridge-domain bridge-id


                                              Example:
                                              Device(config-if-srv)# bridge-domain 100
                                               

                                              Establishes a bridge domain.

                                               
                                              Step 28 cfm mep domain domain-name inward mpid mpid-value


                                              Example:
                                              Device(config-if-srv)# cfm mep domain PROVIDER inward mpid 201
                                               

                                              Configures a MEP for a domain.

                                               
                                              Step 29 end


                                              Example:
                                              Device(config-if-srv)# end
                                               

                                              Returns to privileged EXEC mode.

                                               
                                              Step 30 configure terminal


                                              Example:
                                              Device# configure terminal
                                               

                                              Enters global configuration mode.

                                               
                                              Step 31 ethernet cfm cc enable level level-id evc evc-name


                                              Example:
                                              Device(config)# ethernet cfm cc enable level 0-7 evc evc_100
                                               

                                              Globally enables transmission of CCMs.

                                               
                                              Step 32 ethernet cfm cc level any evc evc-name interval seconds loss-threshold num-msgs


                                              Example:
                                              Device(config)# ethernet cfm cc level any evc evc_100 interval 100 loss-threshold 2
                                               

                                              Sets the parameters for CCMs.

                                               
                                              Step 33 end


                                              Example:
                                              Device(config)# end
                                               

                                              Returns to privileged EXEC mode.

                                               
                                              What to Do Next


                                              Note


                                              When configuring CFM over bridge domains where the bridge-domain ID matches the vlan ID service, you must configure the vlan service and the EVC service with the same service name. The bridge-domain is associated with the EVC service. The vlan and the bridge-domain represent the same broadcast domain.


                                              Troubleshooting Tips

                                              To verify and isolate a fault, start at the highest level maintenance domain and do the following:

                                              • Check the device error status.
                                              • When an error exists, perform a loopback test to confirm the error.
                                              • Run a traceroute to the destination to isolate the fault.
                                              • If the fault is identified, correct the fault.
                                              • If the fault is not identified, go to the next lower maintenance domain and repeat these four steps at that maintenance domain level.
                                              • Repeat the first four steps, as needed, to identify and correct the fault.

                                              Configuring Ethernet OAM Interaction with CFM

                                              For Ethernet OAM to function with CFM, you must configure an EVC and the OAM manager and associate the EVC with CFM. Additionally, you must use an inward facing MEP when you want interaction with the OAM manager.

                                              Configuring the OAM Manager


                                              Note


                                              If you configure, change, or remove a UNI service type, EVC, Ethernet service instance, or CE-VLAN configuration, all configurations are checked to ensure that UNI service types are matched with EVC configurations and Ethernet service instances are matched with CE-VLAN configurations. Configurations are rejected if the pairings do not match.


                                              Perform this task to configure the OAM manager on a PE device.
                                              SUMMARY STEPS

                                                1.    enable

                                                2.    configure terminal

                                                3.    ethernet cfm domain domain-name level level-id [direction outward]

                                                4.    service csi-id vlan vlan-id

                                                5.    exit

                                                6.    ethernet evc evc-id

                                                7.    oam protocol {cfm svlan svlan-id domain domain-name | ldp}

                                                8.    exit

                                                9.    Repeat Steps 3 through 8 to define other CFM domains that you want OAM manager to monitor.

                                                10.    end


                                              DETAILED STEPS
                                                  Command or Action Purpose
                                                Step 1 enable


                                                Example:
                                                Device> enable
                                                 

                                                Enables privileged EXEC mode.

                                                • Enter your password if prompted.
                                                 
                                                Step 2 configure terminal


                                                Example:
                                                Device# configure terminal
                                                 

                                                Enters global configuration mode.

                                                 
                                                Step 3 ethernet cfm domain domain-name level level-id [direction outward]


                                                Example:
                                                Device(config)# ethernet cfm domain cstmr1 level 3
                                                 

                                                Defines a CFM domain, sets the domain level, and enters Ethernet CFM configuration mode.

                                                 
                                                Step 4 service csi-id vlan vlan-id


                                                Example:
                                                Device(config-ether-cfm)# service csi2 vlan 10
                                                 

                                                Defines a universally unique customer service instance (CSI) and VLAN ID within the maintenance domain.

                                                 
                                                Step 5 exit


                                                Example:
                                                Device(config-ether-cfm)# exit
                                                 

                                                Returns to global configuration mode.

                                                 
                                                Step 6 ethernet evc evc-id


                                                Example:
                                                Device(config)# ethernet evc 50
                                                 

                                                Defines an EVC and enters EVC configuration mode.

                                                 
                                                Step 7 oam protocol {cfm svlan svlan-id domain domain-name | ldp}


                                                Example:
                                                Device(config-evc)# oam protocol cfm svlan 10 domain cstmr1
                                                 

                                                Configures the EVC OAM protocol.

                                                 
                                                Step 8 exit


                                                Example:
                                                Device(config-evc)# exit
                                                 

                                                Returns to global configuration mode.

                                                 
                                                Step 9 Repeat Steps 3 through 8 to define other CFM domains that you want OAM manager to monitor.  

                                                 
                                                Step 10 end


                                                Example:
                                                Device(config)# end
                                                 

                                                Returns to privileged EXEC mode.

                                                 

                                                Enabling Ethernet OAM

                                                The order in which the global and interface configuration commands are issued determines the configuration. The last command that is issued has precedence.

                                                Perform this task to enable Ethernet OAM on a device or on an interface.

                                                SUMMARY STEPS

                                                  1.    enable

                                                  2.    configure terminal

                                                  3.    interface type number

                                                  4.    ethernet oam [max-rate oampdus | min-rate num-seconds| mode {active | passive} | timeout seconds]

                                                  5.    end


                                                DETAILED STEPS
                                                    Command or Action Purpose
                                                  Step 1 enable


                                                  Example:
                                                  Device> enable
                                                   

                                                  Enables privileged EXEC mode.

                                                  • Enter your password if prompted.
                                                   
                                                  Step 2 configure terminal


                                                  Example:
                                                  Device# configure terminal
                                                   

                                                  Enters global configuration mode.

                                                   
                                                  Step 3 interface type number


                                                  Example:
                                                  Device(config)# interface ethernet 1/3
                                                   

                                                  Specifies an interface and enters interface configuration mode.

                                                   
                                                  Step 4 ethernet oam [max-rate oampdus | min-rate num-seconds| mode {active | passive} | timeout seconds]


                                                  Example:
                                                  Device(config-if)# ethernet oam max-rate 50
                                                   

                                                  Enables Ethernet OAM on an interface.

                                                   
                                                  Step 5 end


                                                  Example:
                                                  Device(config-if)# end
                                                   

                                                  Returns to privileged EXEC mode.

                                                   

                                                  Configuration Examples for Configuring Ethernet CFM in a Service Provider Network

                                                  Example: Provisioning a Network

                                                  This configuration example shows only CFM-related commands. All commands that are required to set up the data path and configure the VLANs on the device are not shown. However, it should be noted that CFM traffic will not flow into or out of the device if the VLANs are not properly configured.

                                                  CE-A
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !!
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !!
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
                                                  
                                                  U-PE A
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  !
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  !
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet4/2
                                                  ethernet cfm mip level 1
                                                  ! 
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
                                                  PE-AGG A
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  !
                                                  ethernet cfm global 
                                                  !
                                                  interface gigabitethernet3/1
                                                  ethernet cfm mip level 1
                                                  !
                                                  interface gigabitethernet4/1
                                                  ethernet cfm mip level 1
                                                  N-PE A
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  !
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  !
                                                  ethernet cfm global 
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet3/0
                                                  ethernet cfm mip level 1
                                                  !
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
                                                  U-PE B
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  !
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  !
                                                  ethernet cfm global 
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet2/0
                                                  ethernet cfm mip level 2
                                                  !
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
                                                  PE-AGG B
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  ! 
                                                  ethernet cfm global 
                                                  !
                                                  interface gigabitethernet1/1
                                                  ethernet cfm mip level 2
                                                  !
                                                  interface gigabitethernet2/1
                                                  ethernet cfm mip level 2
                                                  N-PE B
                                                  !
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  !
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  ! 
                                                  ethernet cfm global 
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet1/2
                                                  ethernet cfm mip level 2
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
                                                  CE-B
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !!
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !!
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  !
                                                  snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config
                                                  snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up

                                                  Example: Provisioning Service

                                                  This configuration example shows only CFM-related commands. All commands that are required to set up the data path and configure the VLANs on the device are not shown. However, it should be noted that CFM traffic will not flow into or out of the device if the VLANs are not properly configured.

                                                  CE-A
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  service Customer1 vlan 100
                                                  !
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet3/2
                                                  ethernet cfm mep level 7 direction outward domain Customer1 mpid 701 vlan 100
                                                  !
                                                  ethernet cfm cc enable level 7 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  U-PE A
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  service MetroCustomer1 vlan 100
                                                  !
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpA vlan 100
                                                  !
                                                  ethernet cfm global 
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet3/2
                                                  ethernet cfm mip level 7
                                                  ethernet cfm mep level 4 mpid 401 vlan 100
                                                  ethernet cfm mep level 1 mpid 101 vlan 100
                                                  !
                                                  interface gigabitethernet4/2
                                                  ethernet cfm mip level 1
                                                  !
                                                  ethernet cfm cc enable level 4 vlan 100
                                                  ethernet cfm cc enable level 1 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  PE-AGG A
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpA vlan 100
                                                  ! 
                                                  ethernet cfm global
                                                  !
                                                  interface gigabitethernet3/1
                                                  ethernet cfm mip level 1
                                                  !
                                                  interface gigabitethernet4/1
                                                  ethernet cfm mip level 1
                                                  N-PE A
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  service MetroCustomer1 vlan 100
                                                  !
                                                  ethernet cfm domain OperatorA level 1
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpA vlan 100
                                                  ! 
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet3/0
                                                  ethernet cfm mip level 1
                                                  !
                                                  interface gigabitethernet4/0
                                                  ethernet cfm mip level 4
                                                  ethernet cfm mep level 1 mpid 102 vlan 100
                                                  !
                                                  ethernet cfm cc enable level 1 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  U-PE B
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  service MetroCustomer1 vlan 100
                                                  !
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpB vlan 100
                                                  !
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet1/0
                                                  ethernet cfm mip level 7
                                                  ethernet cfm mep level 4 mpid 402 vlan 100
                                                  ethernet cfm mep level 2 mpid 201 vlan 100
                                                  !
                                                  interface gigabitethernet2/0
                                                  ethernet cfm mip level 2
                                                  !
                                                  ethernet cfm cc enable level 4 vlan 100
                                                  ethernet cfm cc enable level 2 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  PE-AGG B
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpB vlan 100
                                                  !
                                                  ethernet cfm global 
                                                  !
                                                  interface gigabitethernet1/1
                                                  ethernet cfm mip level 2
                                                  !
                                                  interface gigabitethernet2/1
                                                  ethernet cfm mip level 2
                                                  N-PE B
                                                  !
                                                  ethernet cfm domain ServiceProvider level 4
                                                  mep archive-hold-time 60
                                                  service MetroCustomer1 vlan 100
                                                  !
                                                  ethernet cfm domain OperatorB level 2
                                                  mep archive-hold-time 65
                                                  service MetroCustomer1OpB vlan 100
                                                  !
                                                  ethernet cfm global 
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet1/2
                                                  ethernet cfm mip level 2
                                                  !
                                                  interface gigabitethernet2/2
                                                  ethernet cfm mip level 4
                                                  ethernet cfm mep level 2 mpid 202 vlan 100
                                                  !
                                                  ethernet cfm cc enable level 2 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3
                                                  CE-B
                                                  !
                                                  ethernet cfm domain Customer level 7
                                                  service Customer1 vlan 100
                                                  !
                                                  ethernet cfm global
                                                  ethernet cfm traceroute cache
                                                  ethernet cfm traceroute cache size 200
                                                  ethernet cfm traceroute cache hold-time 60
                                                  !
                                                  interface gigabitethernet3/2
                                                  ethernet cfm mep level 7 direction outward domain Customer1 mpid 702 vlan 100
                                                  !
                                                  ethernet cfm cc enable level 7 vlan 100
                                                  ethernet cfm cc level any vlan any interval 20 loss-threshold 3

                                                  Additional References for Configuring Ethernet Connectivity Fault Management in a Service Provider Network

                                                  Related Documents

                                                  Related Topic

                                                  Document Title

                                                  Carrier Ethernet commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples

                                                  Cisco IOS Carrier Ethernet Command Reference

                                                  Cisco IOS commands: master list of commands with complete command syntax, command mode, command history, defaults, usage guidelines, and examples

                                                  Cisco IOS Master Command List, All Releases

                                                  IEEE 802.3ah

                                                  IEEE 802.3ah Ethernet in the First Mile

                                                  ISSU feature and functions

                                                  High Availability Configuration Guide

                                                  SSO

                                                  High Availability Configuration Guide

                                                  Configuring CFM over an EFP Interface with the Cross Connect feature on the Cisco ASR 903 Router.

                                                  Configuring the CFM over EFP Interface with Cross Connect Feature

                                                  Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router

                                                  Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router

                                                  Standards

                                                  Standard

                                                  Title

                                                  IEEE P802.1ag/D1.0

                                                  Standard for Local and Metropolitan Area Networks - Virtual Bridged Local Area Networks - Amendment 5: Connectivity Fault Management

                                                  IETF VPLS OAM

                                                  L2VPN OAM Requirements and Framework

                                                  ITU-T

                                                  ITU-T Y.1731 OAM Mechanisms for Ethernet-Based Networks

                                                  MIBs

                                                  MIB

                                                  MIBs Link

                                                  CISCO-ETHER-CFM-MIB

                                                  To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

                                                  http:/​/​www.cisco.com/​go/​mibs

                                                  Technical Assistance

                                                  Description

                                                  Link

                                                  The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

                                                  http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

                                                  Feature Information for Configuring Ethernet CFM in a Service Provider Network

                                                  The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

                                                  Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

                                                  Feature Name

                                                  Releases

                                                  Feature Information

                                                  CFM Outward Facing MEPs on Switch Ports

                                                  12.2(33)SRD

                                                  Cisco IOS XE 3.1.0SG

                                                  The CFM Outward Facing MEPs on Switch Ports feature supports outward facing MEPs on switch ports. It is an enhancement to the Outward Facing MEP feature that supports the network at the distribution and access tiers.

                                                  The following command was introduced or modified:

                                                  ethernet cfm mep level mpid vlan.

                                                  Ethernet Connectivity Fault Management

                                                  12.2(33)SRA

                                                  12.2(33)SRB

                                                  12.4(15)T2

                                                  12.2(33)SXI

                                                  Cisco IOS XE 3.1.0SG

                                                  15.3(1)S

                                                  Ethernet CFM is an end-to-end per-service-instance Ethernet layer OAM protocol. It includes proactive connectivity monitoring, fault verification, and fault isolation for large Ethernet MANs and WANs.

                                                  Ethernet CFM is supported on the Cisco 7600 router in Cisco IOS Release 12.2(33)SRA and on the Cisco 7200 VXR router in Cisco IOS Release 12.4(15)T.

                                                  Ethernet CFM is supported on the Cisco 7600 router in Cisco IOS Release 12.2(33)SRA and on the Cisco 7200 VXR router in Cisco IOS Release 12.4(15)T.

                                                  The following commands were introduced or modified:

                                                  clear ethernet cfm errors, clear ethernet cfm maintenance-points remote, clear ethernet cfm traceroute-cache, debug ethernet cfm all, debug ethernet cfm diagnostic, debug ethernet cfm errors, debug ethernet cfm events, debug ethernet cfm packets, ethernet cfm cc, ethernet cfm cc enable level vlan, ethernet cfm domain level, ethernet cfm enable, ethernet cfm enable (interface), ethernet cfm mep crosscheck, ethernet cfm mep crosscheck start-delay, ethernet cfm mep level mpid vlan, ethernet cfm mip level, ethernet cfm traceroute cache, ethernet cfm traceroute cache hold-time, ethernet cfm traceroute cache size, mep archive-hold-time, ping ethernet mpid vlan, ping ethernet vlan, service vlan, show ethernet cfm errors, show ethernet cfm maintenance-points local, show ethernet cfm maintenance-points remote, show ethernet cfm maintenance-points remote crosscheck, show ethernet cfm maintenance-points remote detail, show ethernet cfm traceroute-cache, snmp-server enable traps ethernet cfm cc, snmp-server enable traps ethernet cfm crosscheck, traceroute ethernet vlan.

                                                  802.3ah and CFM Interworking

                                                  12.2(33)SRB

                                                  12.2(33)SXI

                                                  Cisco IOS XE 3.1.0SG

                                                  The Ethernet OAM and Ethernet CFM Interworking feature enables Ethernet OAM and CFM to function together in a network.

                                                  Ethernet-OAM3.0: CFM Over BD, Untagged

                                                  12.2(33)SRD

                                                  12.2(50)SY

                                                  Ethernet-OAM3.0 with support for CFM over bridge domains is supported on the Cisco 7600 Series Route Switch Processor 720 and on the Cisco 7600 Series Supervisor Engine 720 in Cisco IOS Release 12.2(33)SRD.

                                                  Ethernet-OAM3.0: CFM Over BD, Untagged

                                                  The following commands were introduced or modified:

                                                  cfm encapsulation,

                                                  Ethernet-OAM3.0: CFM Over BD, Untagged

                                                  cfm mep domain, debug ethernet cfm all, debug ethernet cfm events, debug ethernet cfm packets, ethernet cfm cc, ethernet cfm cc enable level evc, ethernet cfm mep crosscheck, mep crosscheck mpid evc, mep crosscheck mpid vlan, ping ethernet evc, service evc, show ethernet cfm maintenance-points remote crosscheck, show ethernet cfm maintenance-points remote detail, traceroute ethernet evc.

                                                  ISSU Support in CFM 802.1ag/1.Od

                                                  12.2(33)SRD

                                                  ISSU support allows a Cisco IOS software product to perform and upgrade or downgrad without disrupting packet flow.

                                                  The following command was introduced or modified: debug ethernet cfm.

                                                  NSF/SSO Support in CFM 802.1ag/1.0d

                                                  12.2(33)SRD

                                                  Cisco IOS XE 3.1.0SG

                                                  CFM support for NSF/SSO allows CFM processes that support dual route processors in active/standby mode to continue forwarding packets following a switchover.

                                                  Outward Facing MEP

                                                  12.4(11)T

                                                  12.2(33)SRB

                                                  12.2(33)SXI

                                                  The Outward Facing MEP feature is an enhancement to Ethernet CFM that supports the distribution and access environments by supporting outward facing MEPs on routed (Layer 3) ports.

                                                  Ethernet CFM with support for outward facing MEPs is supported on the Cisco Integrated Services Routers (ISRs) in Cisco IOS Release 12.4(11)T.

                                                  The following command was introduced or modified:

                                                  ethernet cfm mep level mpid vlan.

                                                  Glossary

                                                  CCM—continuity check message. A multicast CFM frame that a MEP transmits periodically to ensure continuity across the maintenance entities to which the transmitting MEP belongs, at the MA level on which the CCM is sent. No reply is sent in response to receiving a CCM.

                                                  EVC—Ethernet virtual connection. An association of two or more user-network interfaces.

                                                  fault alarm—An out-of-band signal, typically an SNMP notification, that notifies a system administrator of a connectivity failure.

                                                  inward-facing MEP—A MEP that resides in a bridge and transmits to and receives CFM messages from the direction of the bridge relay entity.

                                                  maintenance domain—The network or part of the network belonging to a single administration for which faults in connectivity are to be managed. The boundary of a maintenance domain is defined by a set of DSAPs, each of which may become a point of connectivity to a service instance.

                                                  maintenance domain name—The unique identifier of a domain that CFM is to protect against accidental concatenation of service instances.

                                                  MEP—maintenance endpoint. An actively managed CFM entity associated with a specific DSAP of a service instance, which can generate and receive CFM frames and track any responses. It is an endpoint of a single MA, and terminates a separate maintenance entity for each of the other MEPs in the same MA.

                                                  MEP CCDB—A database, maintained by every MEP, that maintains received information about other MEPs in the maintenance domain.

                                                  MIP—maintenance intermediate point. A CFM entity, associated with a specific pair of ISS SAPs or EISS Service Access Points, which reacts and responds to CFM frames. It is associated with a single maintenance association and is an intermediate point within one or more maintenance entities.

                                                  MIP CCDB—A database of information about the MEPs in the maintenance domain. The MIP CCDB can be maintained by a MIP.

                                                  MP—maintenance point. Either a MEP or a MIP.

                                                  MPID—maintenance endpoint identifier. A small integer, unique over a given MA, that identifies a specific MEP.

                                                  OAM—operations, administration, and maintenance. A term used by several standards bodies to describe protocols and procedures for operating, administrating, and maintaining networks. Examples are ATM OAM and IEEE Std. 802.3ah OAM.

                                                  operator—Entity that provides a service provider a single network of provider bridges or a single Layer 2 or Layer 3 backbone network. An operator may be identical to or a part of the same organization as the service provider. For purposes of IEEE P802.1ag, Draft Standard for Local and Metropolitan Area Networks, the operator and service provider are presumed to be separate organizations.

                                                  Terms such as “customer,” “service provider,” and “operator” reflect common business relationships among organizations and individuals that use equipment implemented in accordance with IEEE P802.1ag.

                                                  UNI—user-network interface. A common term for the connection point between an operator's bridge and customer equipment. A UNI often includes a C-VLAN-aware bridge component. The term UNI is used broadly in the IEEE P802.1ag standard when the purpose for various features of CFM are explained. UNI has no normative meaning.