To enable the Alarm Indication Signal (AIS) function for a specific maintenance association, use the ais command in Ethernet connectivity fault management (CFM) service configuration mode. To disable AIS configuration, use the no form of this command.

Syntax Description

Command Default

The AIS function is enabled on specific maintenance associations.

Command Modes

Ethernet CFM service configuration (config-ecfm-srv)

Command History

Usage Guidelines

Alarms are suppressed when a MEP goes into an RX AIS (receipt of an AIS frame) defect condition.

When you specify the level keyword with the ais command, you can transmit AIS messages to a higher maintenance association without configuring a maintenance intermediate point (MIP) for that maintenance association.

Output of the show running all command shows "ais expiry-threshold 3.5" when the default expiry threshold is configured, "ais period 60" when the default transmission period is configured, and "no ais suppress-alarms" when the default value for the suppress-alarms option is configured.

Related Commands

To configure an alarm when fault alarms are enabled, use the alarmcommand in Ethernet connectivity fault management (CFM) interface configuration mode. To remove the configuration, use the no form of this command.

Syntax Description

Command Default

Alarms are disabled.

Command Modes

Ethernet CFM interface configuration (config-if-ecfm-mep)

Command History

Usage Guidelines

This command overrides the global ethernet cfm alarmcommand.

If a higher priority defect occurs after a lower priority defect has triggered an alarm but before the alarm has reset, immediately issue another fault alarm for the higher priority defect.

Output of the show running all command displays "alarm delay 2500" when the default value for the delay option is configured, "alarm mac-remote-error-xcon" when the default value for the notification option is configured, and "alarm reset 10000" when the default value for the reset option is configured.

Related Commands

To set an interval value for timing announcement packets, use the announce interval command in Precision Time Protocol clock port mode. To remove an announcement interval configuration, use the no form of this command.

Syntax Description

Command Default

For the IE 3000 switch, the default value is 1. For the MWR 2941 router, the default value is 2.

Command Modes

PTP clock port configuration (config-ptp-port)

Command History

Usage Guidelines

The interval value defined by this command impacts the timeout value defined by the announce timeout command.

Related Commands

To set a timeout value for timing announcement packets, use the announce timeout command in Precision Time Protocol clock port mode. To remove an announcement timeout configuration, use the no form of this command.

Syntax Description

Command Default

The default timeout value is 3.

Command Modes

PTP clock port configuration (config-ptp-port)

Command History

Usage Guidelines

This command configures the number of announcement intervals before the session times out. To define the length of the announcement intervals, use the announce interval command.

Related Commands

To enter Ethernet ring instance aps-channel configuration mode, use the aps-channel command in Ethernet ring instance configuration mode. To exit Ethernet ring instance aps-channel configuration mode, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet ring instance aps-channel configuration mode is not entered.

Command Modes

Ethernet ring instance configuration (config-erp-inst)

Command History

Usage Guidelines

Use this command when opening (resolving) a blocked Ethernet ring.

To configure a backbone interface for a redundancy group, use the backbone interface command in interchassis redundancy configuration mode. To remove the configuration, use the no form of this command.

Syntax Description

Command Default

A backbone interface is not configured.

Command Modes

Interchassis redundancy configuration (config-r-ic)

Command History

Usage Guidelines

Use this command to configure a backbone interface to monitor all interfaces in a redundancy group. For example, if all interfaces are in the DOWN state (core isolation), the backbone interface signals the redundancy group clients, and they may initiate attachment circuit (AC) failover procedures. An example client might be Multichassis Link Aggregation Control Protocol (mLACP).

To configure components on a bridge domain, use the bridge-domain command in global configuration mode. To remove the configured components from the bridge domain and to return the components to the bridge-domain default state, use the no form of this command.

Syntax Description

Command Default

No components are configured on the bridge domain.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

When the bridge-domain command is executed without the aging-time keyword, the command mode changes from global configuration mode (config) to bridge-domain configuration mode (config-bdomain). Issuing the bridge-domain c-mac aging-time command does not result in a command mode change.

In bridge-domain configuration mode, additional components can be configured on the bridge domain; for example, the MAC address limiting security component.

Note	In service instance configuration mode, the bridge-domaincommand binds a service instance to a bridge-domain instance.

Related Commands

To bind a service instance or a MAC tunnel to a bridge domain instance, use the bridge-domain command in either service instance configuration mode or MAC-in-MAC tunnel configuration mode. To unbind a service instance or MAC tunnel from a bridge domain instance, use the no form of this command.

Syntax Description

Command Default

Service instances and MAC tunnels are not bound to a bridge domain instance.

Command Modes

Service instance configuration (config-if-svc) MAC-in-MAC tunnel configuration (config-tunnel-minm)

Command History

Usage Guidelines

Use the bridge-domain(service instance) command to bind either a service instance or a MAC tunnel to a bridge domain.

Bridge domains cannot be configured under a service instance under a MAC tunnel without encapsulation also being configured.

The Cisco ASR 1000 Device does not support MAC tunnels.

Note	The bridge-domain(config) command allows a user to configure components on a bridge domain. For example, the MAC Address Limiting security component can be configured on a bridge domain using this command.

Related Commands

To create a range of bridge domains on the basis of the bridge-domain IDs derived from encapsulation VLAN numbers, use the bridge-domain from-encapsulation command in Ethernet service configuration mode. To remove the bridge domains, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Bridge domains are not created.

Command Modes

Ethernet service (config-if-srv)

Command History

Usage Guidelines

Use the bridge-domain from-encapsulation command in Ethernet service configuration mode (config-if-srv) to configure support for Ethernet Flow Points (EFPs) on trunk ports (interfaces).

To enter Ethernet service configuration mode (config-if-srv), use the service instance ethernet command.

The bridge-domain from-encapsulation command is used in conjunction with the encapsulation dot1q command. The bridge-domain from-encapsulation command uses the VLAN range specified by the encapsulation dot1q command to create the corresponding range of bridge domains. In the following example, bridge domains in the range of 12 to 1900 are created on the basis of the VLAN range specified by the encapsulation dot1q command.

Router(config)# interface GigabitEthernet0/0/5
Router(config-if)# service instance trunk 4000 ethernet
Router(config-if-srv)# encapsulation dot1q 12-1900
Router(config-if-srv)# bridge-domain from-encapsulation

Related Commands

To configure connectivity fault management (CFM) Ethernet frame encapsulation, use the cfm encapsulation command in service instance configuration mode. To remove the encapsulation, use the no form of this command.

Syntax Description

Command Default

CFM Ethernet frame encapsulation is not configured.

Command Modes

Service instance configuration (config-if-srv)

Command History

Usage Guidelines

To use the cfm encapsulation command, you must first configure a bridge domain in Ethernet service configuration mode using the bridge-domain command.

When a range of VLANs is configured under the Ethernet flow point, the cfm encapsulation command configures the VLAN ID on which to send locally sourced CFM frames. The VLAN ID specified must be within the range configured in the encapsulation command.

The cfm encapsulation command does not support untagged service instances.

Related Commands

To configure a maintenance endpoint (MEP) for a domain, use the cfm mep domain command in either service instance configuration mode or virtual forwarding instance (VFI) configuration mode. To remove the MEP, use the no form of this command.

Syntax Description

Command Default

The direction of CFM packets is inward.

Command Modes

Service instance configuration (config-if-srv)

VFI configuration (config-vfi)

Command History

Usage Guidelines

The cfm mep domain command defines an Ethernet flow point as an MEP. To use the cfm mep domain command, you must first configure a bridge domain in service instance configuration mode by issuing the bridge-domain command.

Related Commands

To assign and configure an EtherChannel interface to an EtherChannel group, use the channel-group command in interface configuration mode. To remove the channel-group configuration from the interface, use the no form of this command.

Syntax Description

Command Default

No channel groups are assigned.

Command Modes

Interface configuration (config-if)

Command History

Usage Guidelines

OSMs are not supported on Cisco 7600 series routers that are configured with a Supervisor Engine 32.

IP Address for the Physical Interface

You do not have to disable the IP address that is assigned to a physical interface that is part of a channel group, but Cisco highly recommends doing so.

Layer 2 and Layer 3 Port Channels

You can create both Layer 2 and Layer 3 port channels by entering the interface port-channel command or, when the channel-group gets its first physical interface assignment. The port channels are not created at run time, nor are they created dynamically.

You do not have to create a port-channel interface before assigning a physical interface to a channel group. A port-channel interface is automatically created when the channel group gets its first physical interface, if it is not already created.

Propagation of Configuration and Attribute Changes

Any configuration or attribute changes you make to the port-channel interface are propagated to all interfaces within the same channel group as the port channel. (for example, configuration changes are also propagated to the physical interfaces that are not part of the port-channel, but are part of the channel group.)

The on Keyword

When you use the onkeyword, a usable EtherChannel exists only when a port group in on mode is connected to another port group in the on mode.

Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers

You do not have to create a port-channel interface before assigning a physical interface to a channel group. A port-channel interface is created automatically when the channel group gets its first physical interface, if it is not already created.

Cisco ASR 1000 Series Routers

The Cisco ASR 1000 series router has the following prerequisites and restriction:

• A port-channel must be created before member links are assigned to it.
• IP addresses must be disabled on member links before those links can be included in a port-channel.
• Fast Ethernet interfaces are not supported.

Cisco Catalyst Switches

The number of valid values for numberdepends on the software release. For software releases prior to Cisco IOS Release 12.1(3a)E3, valid values are from 1 to 256; for Cisco IOS Release 12.1(3a)E3, 12.1(3a)E4, and 12.1(4)E1, valid values are from 1 to 64. Cisco IOS Release 12.1 E and later releases support a maximum of 64 values ranging from 1 to 256.

The channel-group number is global and is shared between all the channeling protocols. If a specific channel number is used for the PAgP-enabled interfaces of a channel group, that same channel number cannot be used for configuring a channel that has LACP-enabled interfaces or vice versa.

Entering the auto or desirable keyword enables PAgP on the specified interface; the command will be rejected if it is issued on an LACP-enabled interface.

The active and passive keywords are valid on PAgP-disabled interfaces only.

You can change the mode for an interface only if it is the only interface that is designated to the specified channel group.

The on keyword forces the bundling of the interface on the channel without any negotiation.

You can manually configure a switch with PAgP on one side and LACP on the other side in the on mode.

With the on mode, a usable EtherChannel exists only when a port group in on mode is connected to another port group in on mode.

If you enter the channel group command on an interface that is added to a channel with a different protocol than the protocol you are entering, the command is rejected.

If the interface belongs to a channel, the no form of this command is rejected.

All ports in the same channel group must use the same protocol; you cannot run two protocols on one channel group.

PAgP and LACP are not compatible; both ends of a channel must use the same protocol.

You can change the protocol at any time, but this change causes all existing EtherChannels to reset to the default channel mode for the new protocol.

Configure all ports in an EtherChannel to operate at the same speed and duplex mode (full duplex only for LACP mode).

All ports in a channel must be on the same DFC-equipped module. You cannot configure any of the ports to be on other modules.

On systems that are configured with nonfabric-enabled modules and fabric-enabled modules, you can bundle ports across all modules, but those bundles cannot include a DFC-equipped module port.

You do not have to create a port-channel interface before assigning a physical interface to a channel group. A port-channel interface is created automatically when the channel group gets its first physical interface, if it is not already created.

You do not have to disable the IP address that is assigned to a physical interface that is part of a channel group, but it is highly recommended.

You can create both Layer 2 and Layer 3 port channels by entering the interface port-channel command or when the channel group gets its first physical interface assignment. The port channels are not created at runtime or dynamically.

Any configuration or attribute changes that you make to the port-channel interface are propagated to all interfaces within the same channel group as the port channel (for example, configuration changes are also propagated to the physical interfaces that are not part of the port channel but are part of the channel group).

When configuring Layer 2 EtherChannels, you cannot put Layer 2 LAN ports into manually created port-channel logical interfaces.

Only the on mode is supported when using this command with GE-WAN ports on the OSM-2+4GE-WAN+ OSM to create QinQ link bundles for advanced QinQ translation. Also, you cannot use the channel-group command on GE-WAN interfaces if MPLS is configured. You must remove all IP, MPLS, and other Layer 3 configuration commands before using the channel-group command with GE-WAN interfaces.

Note

The GE-WAN interfaces on an OSM-2+4GE-WAN+ OSM behave slightly differently than other interfaces if you want to move the interface from one group to another. To move most other interfaces, you can enter the channel-group command again to delete the interface from the old group and move it to the new group. For GE-WAN ports, however, you must manually remove the interface from the group by entering the no channel-group command before assigning it to a new group.

Caution

Do not enable Layer 3 addresses on the physical EtherChannel interfaces. Assigning bridge groups on the physical EtherChannel interfaces causes loops in your network.

For a complete list of guidelines, see the "Configuring EtherChannel" section of the Cisco 7600 Series Router Cisco IOS Software Configuration Guide.

Fast EtherChannel

Before you assign a Fast Ethernet interface to a Fast EtherChannel group, you must first create a port-channel interface. To create a port-channel interface, use the interface port-channel global configuration command.

If the Fast Ethernet interface has an IP address assigned, you must disable it before adding the Fast Ethernet interface to the Fast EtherChannel. To disable an existing IP address on the Fast Ethernet interface, use the no ip addresscommand in interface configuration mode.

The Fast EtherChannel feature allows multiple Fast Ethernet point-to-point links to be bundled into one logical link to provide bidirectional bandwidth of up to 800 Mbps. Fast EtherChannel can be configured between Cisco 7500 series routers and Cisco 7000 series routers with the 7000 Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI) or between a Cisco 7500 series router or a Cisco 7000 series router with the RSP7000 and RSP700CI and a Cisco Catalyst 5000 switch.

A maximum of four Fast Ethernet interfaces can be added to a Fast EtherChannel group.

Caution

The port-channel interface is the routed interface. Do not enable Layer 3 addresses on the physical Fast Ethernet interfaces. Do not assign bridge groups on the physical Fast Ethernet interfaces because it creates loops. Also, you must disable spanning tree.

To display information about the Fast EtherChannel, use the show interfaces port-channelEXEC command.

For more guidelines see the "Configuring EtherChannel" section of the Cisco 7600 Series Router Cisco IOS Software Configuration Guide and the "Configuring EtherChannel" section of the Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide

Related Commands

To clear a bridge domain of learned MAC addresses, use the clear bridge-domain mac-tablecommand in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use the clear bridge-domain mac table command to purge MAC addresses that have been dynamically learned by a bridge domain.

This command is available on both route processors and linecards. To invoke this command use the remote command module command; for example, remote command module 10 clear bridge-domain 25 mac-table.

Related Commands

To clear a maintenance endpoint (MEP) or server maintenance endpoint (SMEP) from the Ethernet Connectivity Fault Management (CFM) Alarm Indication Signal (AIS) defect condition, use the clear ethernet cfm ais command in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

If an MEP does not exit the AIS state when all errors are resolved, use the clear ethernet cfm ais command with the domain and mpid keywords to clear the AIS defect condition. If a SMEP does not exit the AIS state when all errors are resolved, use the clear ethernet cfm ais command with the link-status interface keywords to clear the AIS defect condition.

Related Commands

To clear continuity check error conditions logged on a device, use the clear ethernet cfm errors command in privileged EXEC mode.

Syntax Description

Command Default

The error database is unchanged; existing entries remain in the database.

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use the clear ethernet cfm errors command to purge error database entries that are not needed and when you want to work with a cleared database. Also, use this command with a specified domain if you want to clear errors for that domain.

In CFM IEEE, if a domain name is more than 43 characters in length, a warning message is displayed notifying that the maintenance domain ID (MDID) will be truncated to 43 characters in continuity check messages if "id <fmt> <MDID>" is not configured.

Related Commands

To purge the contents of the continuity check database, use the clear ethernet cfm maintenance-points remote command in privileged EXEC mode.

Syntax Description

Command Default

The continuity check database is unchanged; existing entries remain in the database.

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use this command to clear the entire continuity check database or clear the database for a specific domain or level. When a domain is specified, only entries for that domain are purged. When a level is specified, entries for all domains at that level are purged.

If a maintenence domain is not specified, the entire continuity check database is cleared.

In CFM IEEE, the level keyword and level-id argument are not supported. Also, if a domain name is more than 43 characters, a warning message is displayed notifying that the maintenance domain ID (MDID) will be truncated to 43 characters in continuity check messages if "id <fmt> <MDID>" is not configured.

Related Commands

To clear a maintenance endpoint (MEP) or server maintenance endpoint (SMEP) out of the Alarm Indication Signal (AIS) defect condition, use the clear ethernet cfm ais command in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

If a MEP does not exit the AIS state when all errors are resolved, use the clear ethernet cfm ais command with the domainand mpidkeywordsto clear the AIS defect condition. If a SMEP does not exit the AIS state when all errors are resolved, use the clear ethernet cfm ais command with the link-status interfacekeywords to clear the AIS defect condition.

Related Commands

To remove the contents of the traceroute cache, use the clear ethernet cfm traceroute-cache command in privileged EXEC mode.

Syntax Description

This command has no arguments or keywords.

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use the clear ethernet cfm traceroute-cache command to remove traceroute cache entries from previous traceroute operations issued on the device. This command also provides visibility into maintenance intermediate points and maintenance end points of a domain as they were recorded when the operation was performed.

Related Commands

To clear Ethernet local management interface (LMI) statistics counters for all interfaces or for a specific interface, use the clear ethernet lmi statistics command in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

This command resets counters and is useful when you want to monitor Ethernet LMI errors for a period of time. For example, to monitor errors for 1 hour, you would issue the clear ethernet lmi statisticscommand to reset the counter. At the end of the hour, you would issue the show ethernet lmi statisticscommand to display errors that occurred during that one-hour time period.

Related Commands

To reset Ethernet operations, maintenance, and administration (OAM) counters and event statistics on all interfaces or on a specific interface, use the clear ethernet oam statisticscommand in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use this command when you are debugging or testing and you want all statistics cleared. After this command is issued, the cleared statistics cannot be restored.

Related Commands

To clear the statistic counters for one or more Ethernet Ring Protocol ( ERP) instances, use the clear ethernet ring g8032 statistics command in user EXEC mode.

Syntax Description

Command Modes

User EXEC (>)

Command History

Usage Guidelines

This command can be used to clear the statistic counters for all ERP instances in an ERP ring, for an ERP instance for a specified ERP ring, or for all ERP instances configured on the device.

To clear Ethernet service instance attributes such as MAC addresses and statistics or to purge Ethernet service instance errors, use the clear ethernet service instance command in privileged EXEC mode.

Syntax Description

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use the clear ethernet service instancecommand to clear service instance attributes that are not needed and to purge service instance errors.

Related Commands

To reset either the Link Layer Discovery Protocol (LLDP) traffic counters or the table that contains LLDP information about neighbors, use the clear lldpcommand in privileged EXEC mode.

Syntax Description

Command Default

The LLDP traffic counters are not reset, and the table of LLDP information is not cleared.

Command Modes

Privileged EXEC (#)

Command History

Usage Guidelines

Use this command for informational purposes or to test a symptom of network malfunction such as packet loss.

Related Commands

To specify the IP address of a Precision Time Protocol clock destination, use the clock destination command in interface configuration mode. To remove a clock destination configuration, use the no form of this command.

Syntax Description

Command Default

No default behavior or values.

Command Modes

Clock port configuration (config-ptp-port)

Command History

Usage Guidelines

If the clock port is set to master mode with unicast and negotiation is disabled, you can only configure a single destination. If the clock port is set to master mode with unicast negotiation, you do not need to use this command because the router uses negotiation to determine the IP address of PTP slave devices.

Related Commands

To specify the clocking mode of a Precision Time Protocol clock port, enter clock port configuration mode using the clock-port command in the PTP clock configuration mode. To remove a clocking mode configuration, use the no form of this command.

Syntax Description

Command Default

This command is disabled by default.

Command Modes

PTP clock configuration (config-ptp-clk)

Command History

Usage Guidelines

This command defines a new clock port and enters clock port configuration mode.

Related Commands

To configure a connection to a Precision Time Protocol master device, use the clock source command in PTP clock port configuration mode. To remove a clock source configuration, use the no form of this command.

Syntax Description

Command Default

No default behavior or values.

Command Modes

PTP clock port configuration (config-ptp-port)

Command History

Usage Guidelines

This command only applies to a clock port in slave mode.

Related Commands

To enable the transmission of continuity check messages (CCMs), use the continuity-check command in Ethernet connectivity fault management (CFM) service configuration mode. To disable message transmission, use the no form of this command.

Syntax Description

Command Default

CCMs are not transmitted.

Command Modes

Ethernet CFM service configuration (config-ecfm-srv)

Command History

Usage Guidelines

The static MEP list configured using the mep mpid command is used to verify whether a MEP received in a CCM is valid. If the MEP in the received CCM is not configured in the MEP list, an error CCM received fault alarm is set.

Output of the show running all command displays "continuity-check interval 1s" when the default interval period is configured and "continuity-check loss-threshold 3" when the default loss threshold is configured.

Related Commands

To set the class of service (CoS) for a maintenance endpoint (MEP) that will be sent in Ethernet connectivity fault management (CFM) messages, use the cos command in the Ethernet CFM interface configuration mode. To set the CoS to the highest priority allowed on the interface, use the no form of this command.

Syntax Description

Command Default

If this command is not configured, the default CoS value is used.

Command Modes

Ethernet CFM interface configuration (config-if-ecfm-mep)

Command History

Usage Guidelines

This command is used to set the priority of messages.

CoS may not be supported on all platforms.

To specify a recommended interval for Precision Time Protocol member devices to send delay request messages, use the delay-req interval command in PTP clock port configuration mode. To remove a delay request interval configuration, use the no form of this command.

Syntax Description

Command Default

The default value is -4 (16 packets per second).

Command Modes

PTP clock-port configuration (config-ptp-port)

Command History

Usage Guidelines

This configuration is only required when an interface is in PTP slave mode.

Related Commands

To specify a descriptive name for an Ethernet ring instance, use the description command in Ethernet ring instance configuration mode. To remove the descriptive name, use the no form of this command.

Syntax Description

Command Default

A descriptive name is not given to the Ethernet ring instance.

Command Modes

Ethernet ring instance configuration (config-erp-inst)

Command History

To describe the name and purpose of a MAC tunnel or a service instance under a MAC tunnel, use the description command in either MAC-in-MAC tunnel configuration mode or MAC tunnel service configuration mode. To remove a description, use the no form of this command.

Syntax Description

Command Default

MAC tunnels or a service instances under MAC tunnels do not have descriptions.

Command Modes

MAC-in-MAC tunnel configuration (config-tunnel-minm) MAC tunnel service configuration (config-tunnel-srv)

Command History

Usage Guidelines

Use this command to identify and describe the type of service for which the MAC tunnel is used.

To disable the generation of Alarm Indication Signal (AIS) frames resulting from a link-status change (server maintenance endpoint [SMEP]), use the disable command in CFM SMEP AIS configuration mode (config-ais-link-cfm). To enable AIS frame generation, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

AIS frames are generated.

Command Modes

CFM SMEP AIS configuration mode (config-ais-link-cfm)

Command History

Usage Guidelines

When the default value is configured, "no disable" is displayed when the show running all command is issued.

Related Commands

To configure dot1ah encapsulation for a specific service instance ID (I-SID), use the encapsulation dot1ah isid command in MAC tunnel service configuration mode. To remove dot1ah encapsulation for an I-SID, use the no form of this command.

Syntax Description

Command Default

Encapsulation is not configured.

Command Modes

MAC tunnel service configuration (config-tunnel-srv)

Command History

Usage Guidelines

The I-SID is used to indicate a service in the provider backbone bridge (PBB) network. You can define the service, which can be a customer or a particular customer and type of data; for example, voice or video.

To enable automatic recovery of a service instance after a MAC security violation, use the errdisable recovery cause mac-security command in service instance configuration mode. To disable the automatic recovery mechanism, use the no form of this command.

Syntax Description

Command Default

Automatic recovery of a service instance is disabled.

Command Modes

Service instance configuration (config-if-srv)

Command History

Usage Guidelines

A cause is the reason why the error-disabled state occurred. When a cause is detected on a service instance, the service instance is placed in the error-disabled state (an operational state that is similar to the shutdown state). When you enable automatic error recovery, the service instance is brought out of the error-disabled state and allowed to retry the operation after all the causes have timed out. If you do not enable automatic error recovery, the service instance stays in the error-disabled state until the shutdown and no shutdown commands are issued.

Alternatively, you can use the clear ethernet service instancecommand to bring the service instance out of the error-disabled state.

Related Commands

To enable automatic recovery from a failover state of the port channel, use the errdisable recovery cause mlacp-minlink command in global configuration mode. To disable this command, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

This command is disabled by default. If the errdisable recovery cause mlacp-minlink is not enabled, the links stay in the ERR_DISABLE state until a shut/no shut is entered on the links.

Command Modes

Global config (config#)

Command History

Usage Guidelines

Use the errdisable recovery cause mlacp-minlinkcommand to enable automatic recovery on the interface from the ERR_DISABLE state. This command tries to bring the port-channel interface out of the ERR_DISABLE state and retry operation after all the causes have timed out. To set the interval for recovery, configure the errdisable recovery intervalseconds command.

Related Commands

To configure Ethernet Connectivity Fault Management (CFM) Alarm Indication Signal (AIS) generation from a server maintenance endpoint (SMEP), use the ethernet cfm ais command in global configuration mode. To disable AIS generation from an SMEP, use the no form of this command.

Syntax Description

Command Default

AIS generation is enabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

The ethernet cfm ais command allows you to configure, enable, or disable AIS generation from an MEP or SMEP. To change the default values for AIS generation on an SMEP, use the link-status global keywords. To change the default values for AIS generation on an MEP, use the domain keyword.

Related Commands

To enable Alarm Indication Signal (AIS) generation from a server maintenance endpoint (SMEP), use the ethernet cfm ais link-statuscommand in interface configuration mode. To disable AIS generation, use the no form of this command.

Syntax Description

Command Default

AIS frames are not generated.

Command Modes

Interface configuration (config-if)

Command History

Usage Guidelines

This command has precedence over the ethernet cfm ais link-status globalcommand issued in global configuration mode.

Related Commands

To globally enable Alarm Indication Signal (AIS) generation and place the CLI in Ethernet Connectivity Fault Management (CFM) AIS MEP configuration mode , use the ethernet cfm ais link-status global command in global configuration mode. To remove the global AIS configuration, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

AIS generation is enabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

The ethernet cfm ais link-status global command changes configuration modes to allow you to configure AIS commands for an SMEP.

To configure an alarm for Ethernet connectivity fault management (CFM), use the ethernet cfm alarmcommand in global configuration mode. To restore the command options' default values, use the no form of this command.

Syntax Description

Command Default

Ethernet CFM alarms are disabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

If a higher priority defect occurs after a lower priority defect has triggered an alarm but before the alarm has reset, immediately issue another fault alarm for the higher priority defect.

Output of the show running all command displays "ethernet cfm alarm delay 2500" when the default value for the delay option is configured and "ethernet cfm alarm reset 10000" when the default value for the reset option is configured.

Related Commands

To set the parameters for continuity check messages (CCMs), use the ethernet cfm cccommand in global configuration mode. To reset parameters to their default values, use the no form of this command.

Syntax Description

Command Default

For all maintenance levels and VLANs configured on a device, the interval is 30 seconds and the loss-threshold is 2.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

The ethernet cfm cccommand is used to set parameters for generating and receiving CCMs in one of the following ways:

• Globally (per device)
• For a maintenance domain
• For a particular customer service instance (CSI)
• For a combination of maintenance domain and CSI

When the ethernet cfm cccommandis issued, the system may perform optimizations by concatenating possible ranges, and the configuration may not go through nonvolatile generation (NVGEN) as it was originally entered.

If you configure the ethernet cfm cccommand with the default values for interval and loss threshold, these parameters will not display after NVGEN. If you configure the command with at least one parameter not at the default value, all parameters are displayed.

An EVC is an association of two or more user network interfaces (UNIs).

Note	This command is not supported in the Connectivity Fault Management 802.1ag Standard (CFM IEEE).

To globally enable transmission of continuity check messages (CCMs), use the ethernet cfm cc enable level evccommand in global configuration mode. To disable transmission of CCMs, use the no form of this command.

Command Default

No CCMs are transmitted.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

Use the ethernet cfm cc enable level evccommand to enable transmission of CCMs in one of the following ways:

• Globally (per device)
• For a particular level
• For a particular EVC
• For a combination of level and EVC

Related Commands

To globally enable transmission of continuity check messages (CCMs), use the ethernet cfm cc enable level vlancommand in global configuration mode. To disable transmission of CCMs, use the no form of this command.

Syntax Description

Command Default

No CCMs are transmitted.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

Use the ethernet cfm cc enable level vlancommand to enable transmission of CCMs in one of the following ways:

• Globally (per device)
• For a particular level
• For a particular VLAN
• For a combination of level and VLAN

How you enter the ethernet cfm cc enable level vlancommand and the format you see in the configuration may be different. For example, if you enter:

Device(config)# ethernet cfm cc enable level 1,2,3,4,5 vlan 100,101,102,103,105

The configuration shows the following:

ethernet cfm cc enable level 1-5 vlan 100-103,105

To shorten the length of the command, you also can enter it this way.

To enable Ethernet connectivity fault management (CFM) distribution, use the ethernetcfmdistributionenable command in the global configuration mode. To disable distribution, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet CFM distribution is disabled when this command is not configured.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

On the Cisco 7600 series router, this command must be configured before Ethernet performance monitoring (EPM) sessions are configured.

When you issue the noethernetcfmdistributionenable command, all EPM sessions on the route processor and on the line card are removed, but the IP SLA configurations remain. If you do not want any Y.1731 performance monitoring sessions, you must remove the IP SLA configurations. You can use the ipslareset command to clear all the IP SLA configurations, or you can clear each one individually.

To define a connectivity fault management (CFM) maintenance domain at a particular maintenance level and enter Ethernet CFM configuration mode, use the ethernet cfm domain levelcommand in global configuration mode. To remove the CFM domain at the specified level, use the no form of this command.

Syntax Description

Command Default

No maintenance domains are assigned to maintenance levels if this command is not issued.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

When a device is in Ethernet CFM configuration mode, parameters specific to a maintenance domain can be set. Several domains, with different names, can be configured at the same maintenance level; however, a single domain cannot be associated with multiple levels.

In CFM IEEE, if a domain name has more than 43 characters, a warning message is displayed notifying that the maintenance domain ID (MDID) will be truncated to 43 characters in continuity check messages if "id <fmt> <MDID>" is not configured.

When this command places the CLI in Ethernet configuration mode, in CFM D1 the mode prompt is "config-ether-cfm" and in CFM IEEE the mode prompt is "config-ecfm."

Related Commands

To enable connectivity fault management (CFM) processing on an interface, use the ethernet cfm enable command in interface configuration mode. To disable CFM processing on an interface, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet CFM is enabled.

Command Modes

Interface configuration (config-if)

Command History

Usage Guidelines

Ethernet CFM is enabled by default on an interface and must be disabled explicitly. When CFM is disabled on an interface, hardware resources (for example, port-ASIC match-registers) are released for that interface.

This command is mutually exclusive of maintenance intermediate point (MIP) and maintenance end point (MEP) configuration commands. The interface must be enabled before any MEPs or MIPs can be configured. Similarly, disabling a port that has MIPs or MEPs configured is not allowed. The user must first unconfigure the maintenance points.

When CFM processing is disabled on an interface, all CFM frames that arrive at that interface are forwarded as normal data traffic, and are not processed by the CPU.

To enable connectivity fault management (CFM) processing globally on a device, use the ethernet cfm enable command in global configuration mode. To disable CFM processing globally on a device, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet CFM is disabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

Ethernet CFM is disabled by default and must be enabled explicitly. When CFM is configured, hardware resources (for example, port-ASIC match-registers) are allocated for CFM.

To enable Ethernet connectivity fault management (CFM) globally on a device, use the ethernet cfm globalcommand in global configuration mode. To disable CFM globally on a device, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet CFM is disabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

Ethernet CFM is disabled by default and must be enabled explicitly. When CFM is configured, hardware resources (for example, port-ASIC match registers) are allocated for CFM.

This command is supported only in the Ethernet CFM IEEE 802.1ag Standard implementation.

To enable the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM, use the ethernet cfm ieeecommand in global configuration mode. To disable the CFM IEEE version, use the no form of this command.

Syntax Description

This command has no arguments or keywords.

Command Default

Ethernet CFM IEEE is disabled.

Command Modes

Global configuration (config)

Command History