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MPLS Traffic Engineering--Fast ReRoute MIB

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MPLS Traffic Engineering—Fast Reroute MIB

Table Of Contents

MPLS Traffic Engineering—Fast Reroute MIB

Contents

Prerequisites for the MPLS Traffic Engineering—Fast Reroute MIB

Restrictions for the MPLS Traffic Engineering—Fast Reroute MIB

Information About the MPLS Traffic Engineering—Fast Reroute MIB

Feature Design of the MPLS Traffic Engineering—Fast Reroute MIB

Functional Structure of the MPLS Traffic Engineering—Fast Reroute MIB

System Flow of SNMP Protocol Requests and Response Messages

FRR MIB Scalar Objects

FRR MIB Notifications

Notification Generation Events

Notification Specification

Notification Monitoring

MIB Tables in the MPLS Traffic Engineering—Fast Reroute MIB

cmplsFrrConstTable

cmplsFrrLogTable

cmplsFrrFacRouteDBTable

How to Configure the MPLS Traffic Engineering—Fast Reroute MIB

Enabling the SNMP Agent for FRR MIB Notifications

Enabling Cisco Express Forwarding

Enabling MPLS Globally on Each LSR

Enabling TE Tunnels

Enabling MPLS FRR on Each TE Tunnel

Enabling a Backup Tunnel on an Interface

Configuration Examples for the MPLS Traffic Engineering—Fast Reroute MIB

Enabling an SNMP Agent on a Host NMS: Example

Enabling Cisco Express Forwarding: Example

Enabling MPLS Globally on Each LSR: Example

Enabling TE Tunnels: Example

Enabling MPLS FRR on Each TE Tunnel: Example

Enabling a Backup Tunnel on an Interface: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

Feature Information for MPLS Traffic Engineering—Fast Reroute MIB

Glossary


MPLS Traffic Engineering—Fast Reroute MIB


First Published: March 30, 2001
Last Updated: May 31, 2007

The MPLS Traffic Engineering—Fast Reroute MIB provides Simple Network Management Protocol (SNMP)-based network management of the Multiprotocol Label Switching (MPLS) Fast Reroute (FRR) feature in Cisco IOS software.

The Fast Reroute MIB has the following features:

Notifications can be created and queued.

Command-line interface (CLI) commands enable notifications, and specify the IP address to where the notifications will be sent.

The configuration of the notifications can be written into nonvolatile memory.

The MIB includes objects describing features within MPLS FRR, and it includes the following tables:

cmplsFrrConstTable

cmplsFrrLogTable

cmplsFrrFacRouteDBTable

The MIB also includes scalar objects (that is, objects that are not in a table). For more information, see the "FRR MIB Scalar Objects" section.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for MPLS Traffic Engineering—Fast Reroute MIB" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

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

Contents

Prerequisites for the MPLS Traffic Engineering—Fast Reroute MIB

Restrictions for the MPLS Traffic Engineering—Fast Reroute MIB

Information About the MPLS Traffic Engineering—Fast Reroute MIB

How to Configure the MPLS Traffic Engineering—Fast Reroute MIB

Configuration Examples for the MPLS Traffic Engineering—Fast Reroute MIB

Additional References

Feature Information for MPLS Traffic Engineering—Fast Reroute MIB

Glossary

Prerequisites for the MPLS Traffic Engineering—Fast Reroute MIB

The network must support the Intermediate System-to-Intermediate System (IS-IS) or Open Shortest Path First (OSPF) protocol.

The SNMP is installed and enabled on the label switch routers (LSRs).

MPLS is enabled globally on each LSR.

Cisco Express Forwarding is enabled on the LSRs.

Traffic engineering (TE) tunnels are enabled.

MPLS FRR is enabled on one of the TE tunnels.

The Resource Reservation Protocol (RSVP) is enabled.

Restrictions for the MPLS Traffic Engineering—Fast Reroute MIB

The implementation of the FRR MIB is limited to read-only (RO) permission for MIB objects.

Configuration of the FRR MIB using the SNMP SET command is not supported in Cisco IOS Release 12.2(33)SRA or in prior releases.

The following tables are not implemented in the specified releases:

mplsFrrOne2OnePlrTable—Not implemented in Cisco IOS Release 12.2(33)SRA or in prior releases.

mplsFrrDetourTable—Not implemented in Cisco IOS Release 12.2(33)SRA or in prior releases.

cmplsFrrLogTableNot implemented in Cisco IOS Release 12.2(33)SRA.

Information About the MPLS Traffic Engineering—Fast Reroute MIB

To use the MPLS Traffic Engineering—Fast Reroute MIB, you need to understand the following concepts:

Feature Design of the MPLS Traffic Engineering—Fast Reroute MIB

Functional Structure of the MPLS Traffic Engineering—Fast Reroute MIB

System Flow of SNMP Protocol Requests and Response Messages

FRR MIB Scalar Objects

FRR MIB Notifications

MIB Tables in the MPLS Traffic Engineering—Fast Reroute MIB

Feature Design of the MPLS Traffic Engineering—Fast Reroute MIB

The FRR MIB enables standard, SNMP-based network management of FRR in Cisco IOS software. This capability requires that SNMP agent code executes on a designated network management station (NMS) in the network. The NMS serves as the medium for user interaction with the network management objects in the MIB.

The FRR MIB is based on the Internet Engineering Task Force (IETF) draft MIB specification draft-ietf-mpls-fastreroute-mib-02.txt. The IETF draft MIB, which undergoes revisions periodically, is evolving toward becoming a standard. The Cisco implementation of the FRR MIB is expected to track the evolution of the IETF draft MIB, and may change accordingly.

Slight differences between the IETF draft MIB and the implementation of FRR within Cisco IOS software require some minor translations between the FRR MIB objects and the internal data structures of Cisco IOS software. These translations are accomplished by the SNMP agent, which runs in the background on the NMS workstation as a low priority process and provides a management interface to Cisco IOS software.

You can use an SNMP agent to access FRR MIB objects using standard SNMP GET operations. All the objects in the FRR MIB follow the conventions defined in the IETF draft MIB.

Functional Structure of the MPLS Traffic Engineering—Fast Reroute MIB

The SNMP agent code supporting the FRR MIB follows the existing model for such code in Cisco IOS software and is, in part, generated by the Cisco IOS tool set, based on the MIB source code. The basis for the generated code is the Cisco version of the FRR MIB CISCO-ietf-frr-mib.

The SNMP agent code, which has a layered structure that is common to MIB support code in Cisco IOS software, consists of the following layers:

Platform-independent layer—This layer is generated primarily by the MIB development Cisco IOS tool set and incorporates platform- and implementation-independent functions. These functions handle SNMP standard functionality in the context of the specific MIB. This layer handles indexes and range or enumeration value checks for GET, GET-NEXT, and SET SNMP operations. A function is generated for each SNMP table or group of objects. This layer calls into the next layer.

Application interface layer—The Cisco IOS tool set generates the function names and template code for MIB objects.

Application-specific layer—This layer provides the mechanism for retrieving relevant data from the managed application layer. It includes an entry point function for each table. This function calls two other functions; one that searches the TE tunnel database that RSVP maintains for the relevant data according to the indexes, and another function that fills the data into the structure.

Managed application layer—This layer includes all the structures and mechanisms, and is managed by the MIB.

System Flow of SNMP Protocol Requests and Response Messages

All SNMP protocol requests and response messages are ultimately handled by the SNMP master agent. When such a message is received on a router, the master agent parses the requests and identifies the MIB to which the request refers. The master agent then queries the subagent responsible for the MIB with a GET, GET-NEXT, or SET request. The FRR MIB subagent retrieves the appropriate data, and returns it to the master agent. The master agent is then responsible for returning an SNMP response to the NMS. All queries occur within the IP SNMP Cisco IOS process, which runs as a low priority task.

FRR MIB Scalar Objects

Scalar objects are objects that are not in tables. A scalar object has one instance (that is, one occurrence).

Table 1 describes the FRR MIB scalar objects supported in Cisco IOS Release 12.2(33)SRA and in prior releases.

Table 1 Scalar Objects 

MIB Object
Function

cmplsFrrDetourIncoming

Number of detour link-state packets (LSPs) entering the device. This object returns 0 because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrDetourOutgoing

Number of detour LSPs leaving the device. This object returns 0 because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrDetourOriginating

Number of detour LSPs originating from the device. This object returns 0 because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrSwitchover

Number of tunnels that are being backed up because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrNumOfConfIfs

Number of MPLS interfaces FRR configured for protection; 0 indicates that LSPs traversing any interface can be protected.

cmplsFrrActProtectedIfs

Number of interfaces FRR is protecting because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrConfProtectingTuns

Number of backup Fast Reroute-protected tunnels configured because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrActProtectedTuns

Number of tunnels protected by the Fast Reroute feature. This object returns 0 because cmplsFrrConstProtectionMethod is set to facilityBackup(1).

cmplsFrrActProtectedLSPs

Number of LSPs that FRR is protecting. If cmplsFrrConstProtectionMethod is set to facilityBackup(1), this object returns 0.

cmplsFrrConstProtectionMethod

This object always returns facilityBackup(1) because Cisco supports only the facility backup protection method.

cmplsFrrNotifsEnabled

A value that indicates whether FRR notifications defined in this MIB are enabled or disabled. This object returns True(1) for enabled, or False(2) for disabled. The default is that notifications are disabled.

cmplsFrrLogTableMaxEntries

Maximum number of entries allowed in the FRR log table. This object always returns 32. Exception: In Cisco IOS Release 12.2(33)SRA, this value always is 0.

cmplsFrrLogTableCurrEntries

Current number of entries in the FRR log table. In Cisco IOS Release 12.2(33)SRA, this object always returns 0.

cmplsFrrNotifMaxRate

Maximum interval rate between FRR MIB notifications. This object always returns 0.


FRR MIB Notifications

Notifications are issued after particular FRR events occur. This section provides the following information about FRR MIB notifications supported in Cisco IOS Release 12 2(33)SRA and in prior releases:

Notification Generation Events

Notification Specification

Notification Monitoring

Notification Generation Events

When you enable FRR MIB notification functionality by issuing the snmp-server enable traps mpls fast-reroute command, notification messages are generated and sent to a designated NMS in the network to signal the occurrence of specific events in Cisco IOS software.

The FRR MIB objects involved in FRR status transitions and event notifications include cmplsFrrProtected. This message is sent to an NMS if there is a major TE tunnel change (that is, fast rerouting of TE tunnels).

Notification Specification

Each FRR notification has a generic type identifier and an enterprise-specific type identifier for identifying the notification type. The generic type for all FRR notifications is "enterprise Specific" because this is not one of the generic notification types defined for SNMP. The enterprise-specific type is 1 for cmplsFrrProtected.

Each notification contains the following objects from the FRR MIB so that the FRR tunnel can be easily identified:

ifIndex of the broken tunnel

ifIndex of the protecting tunnel

ifIndex of the protecting tunnel instance

Upon being invoked, the appropriate FRR interface indexes have already been retrieved by existing FRR code. The FRR interfaces are then used to fill in data for the three objects included in the notification.

Notification Monitoring

When FRR MIB notifications are enabled (see the snmp-server enable traps command), notification messages relating to specific FRR events within Cisco IOS software are generated and sent to a specified NMS in the network. Any utility that supports SNMPv1 or SNPv2 notifications can receive notification messages.

To monitor FRR MIB notifications, log in to an NMS that supports a utility that displays SNMP notifications, and start the display utility.

MIB Tables in the MPLS Traffic Engineering—Fast Reroute MIB

The FRR MIB consists of the following tables:

cmplsFrrConstTable

cmplsFrrLogTable

cmplsFrrFacRouteDBTable

The tables access various data structures to obtain information regarding detours, the FRR database, and logging.

cmplsFrrConstTable

cmplsFrrConstTable displays the configuration of an FRR-enabled tunnel and the characteristics of its accompanying backup tunnels. For each protected tunnel, there can be multiple backup tunnels.

The table is indexed by the following:

cmplsFrrConstIfIndex—The interface on which the protected tunnel is configured

cmplsFrrConstTunnelIndex—The SNMP interface index

cmplsFrrConstTunnelInstance—The tunnel instance

Table 2 describes the MIB objects for cmplsFrrConstTable.

Table 2 cmplsFrrConstTable Objects  

MIB Object
Function

cmplsFrrConstIfIndex

Uniquely identifies an interface on which FRR is configured. If an index has a value of 0, the configuration applies to all interfaces on the device on which the FRR feature can operate.

cmplsFrrConstTunnelIndex

Tunnel for which FRR is requested.

cmplsFrrConstTunnelInstance

Tunnel for which FRR is requested. The value always is 0 because only tunnel heads are represented, and tunnel heads have an instance value of 0.

cmplsFrrConstSetupPrio

Setup priority of the backup tunnel.

cmplsFrrConstHoldingPrio

Holding priority of the backup tunnel.

cmplsFrrConstInclAnyAffinity

Attribute bits that must be set for the tunnel to traverse a link.

cmplsFrrConstInclAllAffinity

Attribute bits that must not be set for the tunnel to traverse a link.

cmplsFrrConstExclAllAffinity

A link satisfies the exclude-all constraint only if the link contains none of the administrative groups specified in the constraint.

cmplsFrrConstHopLimit

The maximum number of hops that the backup tunnel can traverse.

cmplsFrrConstBandwidth

The bandwidth of the backup tunnels for this tunnel, in thousands of bits per second (kbps).

cmplsFrrConstRowStatus

Creates, modifies, and deletes a row in this table.


cmplsFrrLogTable


Note cmplsFrrLogTable and the show mpls traffic-eng fast-reroute log reroutes command are not supported in Cisco IOS Release 12.2(33)SRA.


cmplsFrrLogTable is indexed by the object cmplsFrrLogIndex. The index corresponds to a log entry in the FRR feature's show mpls traffic-eng fast-reroute log reroutes command. That show command stores up to 32 entries at a time. If entries are added, the oldest entry is overwritten with new log information.

cmplsFrrLogTable can store up to 32 entries at a time, overwriting older entries as newer ones are added. The index cmplsFrrLogIndex is incremented to give each log table entry of the MIB a unique index value. Therefore, it is possible to have indexes greater than 32 even though only 32 entries are displaying.

Table 3 describes the MIB objects for cmplsFrrLogTable.

Table 3 cmplsFrrLogTable Objects  

MIB Object
Function

cmplsFrrLogIndex

Number of the FRR event.

cmplsFrrLogEventTime

Number of milliseconds that elapsed from bootstrap time to the time that the event occurred.

cmplsFrrLogInterface

Identifies the interface that was affected by this FRR event. The value can be set to 0 if mplsFrrConstProtectionMethod is set to oneToOneBackup(0).

cmplsFrrLogEventType

The type of FRR event that occurred. The object returns Protected or Other.

cmplsFrrLogEventDuration

Duration of the event, in milliseconds.

cmplsFrrLogEventReasonString

Implementation-specific explanation of the event. The object returns interface down event or interface other event.


cmplsFrrFacRouteDBTable

The following indexes specify which interface and tunnel are being protected by the FRR feature:

cmplsFrrFacRouteProtectedIfIndex

cmplsFrrFacRouteProtectedTunIndex

The following indexes specify the backup tunnel that provides protection to the protected tunnel:

cmplsFrrFacRouteProtectingTunIndex

cmplsFrrFacRouteProtectedTunInstance

cmplsFrrFacRouteProtectedTunIngressLSRId

cmplsFrrFacRouteProtectedTunEgressLSRId

This implementation will attempt to leverage the work already done for the MPLS TE MIB because it contains similar lookup functions for TE tunnels.

Table 4 describes the MIB objects for cmplsFrrFacRouteDBTable.

Table 4 cmplsFrrFacRouteDBTable Objects  

MIB Object
Function

cmplsFrrFacRouteProtectedIfIndex

Interface configured for FRR protection.

cmplsFrrFacRouteProtectedTunIndex

The mplsTunnelEntry primary index for the tunnel head interface designated to protect the interface specified in mplsFrrFacRouteIfProtIdx (and all the tunnels using this interface).

cmplsFrrFacRouteProtectingTunIndex

An mplsTunnelEntry that is being protected by FRR. An index uniquely identifies a tunnel.

cmplsFrrFacRouteProtectedTunInstance

An mplsTunnelEntry that is being protected by FRR. An instance uniquely identifies a tunnel.

cmplsFrrFacRouteProtectedTunIngressLSRId

Inbound label for the backup LSR.

cmplsFrrFacRouteProtectedTunEgressLSRId

Outbound label for the backup LSR.

cmplsFrrFacRouteProtectedTunStatus

State of the protected tunnel. Valid values are:

active—Tunnel label has been placed in the Label Forwarding Information Base (LFIB) and is ready to be applied to incoming packets.

ready—Tunnel's label entry has been created, but is not in the LFIB.

partial—Tunnel's label entry has not been fully created.

cmplsFrrFacRouteProtectingTunResvBw

Amount of bandwidth, in megabytes per second, that is reserved by the backup tunnel.

cmplsFrrFacRouteProtectingTunProtectionType

Type of protection: 0 designates link protection; 1 designates node protection.


How to Configure the MPLS Traffic Engineering—Fast Reroute MIB

This section contains the following procedures:

Enabling the SNMP Agent for FRR MIB Notifications (required)

Enabling Cisco Express Forwarding (required)

Enabling MPLS Globally on Each LSR (required)

Enabling TE Tunnels (required)

Enabling MPLS FRR on Each TE Tunnel (required)

Enabling a Backup Tunnel on an Interface (required)

Enabling the SNMP Agent for FRR MIB Notifications

To enable the SNMP agent for FRR MIB notifications, perform the following steps.

SUMMARY STEPS

1. enable

2. show running-config

3. configure terminal

4. snmp-server community string [view view-name] [ro] [access-list-number]

5. snmp-server enable traps mpls fast-reroute protected

6. end

7. write memory

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

show running-config

Example:

Router# show running-config

Displays the running configuration of the router to determine if an SNMP agent is already running on the device.

If no SNMP information is displayed, continue with the next step.

If any SNMP information is displayed, you can modify or change the information.

Step 3 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 4 

snmp-server community string [view view-name] [ro] [access-list-number]

Example:

Router(config)# snmp-server community public ro

Configures read-only (ro) SNMP community strings for the FRR MIB.

Step 5 

snmp-server enable traps mpls fast-reroute protected

Example:

Router(config)# snmp-server enable traps mpls fast-reroute protected

Enables Fast Reroute traps.

Step 6 

end

Example:

Router(config)# end

Exits to privileged EXEC mode.

Step 7 

write memory

Example:

Router# write memory

Writes the modified SNMP configuration into NVRAM of the router, permanently saving the SNMP settings.


Enabling Cisco Express Forwarding

To enable Cisco Express Forwarding, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. ip cef distributed

4. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

ip cef distributed

Example:

Router(config)# ip cef distributed

Enables distributed Cisco Express Forwarding.

Step 4 

end

Example:

Router(config)# end

Exits to privileged EXEC mode.


Enabling MPLS Globally on Each LSR

To enable MPLS globally on each LSR, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. mpls ip

4. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

mpls ip

Example:

Router(config)# mpls ip

Enables MPLS forwarding of IPv4 packets along normally routed paths for the platform.

Step 4 

end

Example:

Router(config)# end

Exits to privileged EXEC mode.


Enabling TE Tunnels

To enable TE tunnels, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. ip cef

4. mpls traffic-eng tunnels

5. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

ip cef

Example:

Router(config)# ip cef

Enables standard Cisco Express Forwarding operations.

Step 4 

mpls traffic-eng tunnels

Example:

Router(config)# mpls traffic-eng tunnels

Enables the MPLS TE tunnel feature on a device.

Step 5 

end

Example:

Router(config)# end

Exits to privileged EXEC mode.

Enabling MPLS FRR on Each TE Tunnel

To enable MPLS FRR on each TE tunnel, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. tunnel mpls traffic-eng fast-reroute

4. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

tunnel mpls traffic-eng fast-reroute

Example:

Router(config)# tunnel mpls traffic-eng fast-reroute

Enables Fast Reroute on each TE tunnel.

Step 4 

end

Example:

Router(config)# end

Exits to privileged EXEC mode.

Enabling a Backup Tunnel on an Interface

To enable a backup tunnel on an interface, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. mpls traffic-eng backup-path tunnel interface

4. end

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters interface configuration mode.

Step 3 

mpls traffic-eng backup-path tunnel interface

Example:

Router(config-if)# mpls traffic-eng backup-path tunnel tunnel1

Enables a backup tunnel on a specified interface.

Step 4 

end

Example:

Router(config-if)# end

Exits to privileged EXEC mode.

Configuration Examples for the MPLS Traffic Engineering—Fast Reroute MIB

Enabling an SNMP Agent on a Host NMS: Example

Enabling Cisco Express Forwarding: Example

Enabling MPLS Globally on Each LSR: Example

Enabling TE Tunnels: Example

Enabling MPLS FRR on Each TE Tunnel: Example

Enabling a Backup Tunnel on an Interface: Example

Enabling an SNMP Agent on a Host NMS: Example

The following example shows how to enable an SNMP agent on the host NMS:

enable
 show running-config
 configure terminal
 snmp-server community public ro
 snmp-server enable traps mpls fast-reroute protected
 end
 write memory

Enabling Cisco Express Forwarding: Example

The following example shows how to enable Cisco Express Forwarding:

enable
 configure terminal
 ip cef distributed
 end

Enabling MPLS Globally on Each LSR: Example

The following example shows how to enable MPLS globally on each LSR:

enable
 configure terminal
 mpls ip
 end

Enabling TE Tunnels: Example

The following example shows how to enable traffic engineering tunnels:

enable
 configure terminal
 ip cef
 mpls traffic-eng tunnels
 end

Enabling MPLS FRR on Each TE Tunnel: Example

The following example shows how to enable MPLS Fast Reroute on each TE tunnel:

enable
 configure terminal
 tunnel mpls traffic-eng fast-reroute
 end

Enabling a Backup Tunnel on an Interface: Example

The following example shows how to enable a backup tunnel on an interface:

enable
 configure terminal
 mpls traffic-eng backup-path tunnel1
 end

Additional References

The following sections provide references related to the MPLS Traffic Engineering—Fast Reroute MIB feature.

Related Documents

Related Topic
Document Title

SNMP agent support for the MPLS Traffic Engineering MIB (MPLS TE MIB)

MPLS Traffic Engineering (TE) MIB

Fast Reroute

MPLS Traffic Engineering (TE)--Fast Reroute (FRR) Link and Node Protection, Release 12.2(33)SRA


Standards

Standard
Title

MPLS-FRR-MIB

draft-ietf-mpls-fastreroute-mib-02.txt


MIBs

MIB
MIBs Link

MPLS Traffic Engineering (TE) MIB

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

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


RFCs

RFC
Title

http://www.ietf.org/internet-drafts/draft-ietf-mpls-fastreroute-mib-01.txt

Multiprotocol Label Switching (MPLS) Traffic Engineering Management Information Base for Fast Reroute


Technical Assistance

Description
Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register on Cisco.com.

http://www.cisco.com/techsupport


Command Reference

This feature uses no new or modified commands.

Feature Information for MPLS Traffic Engineering—Fast Reroute MIB

Table 5 lists the release history for this feature.

Table 5 Feature Information for MPLS Traffic Engineering—Fast Reroute MIB 

Feature Name
Releases
Feature Information

MPLS Traffic Engineering—Fast Reroute MIB

12.0(10)ST
12.0(16)ST
12.0(22)S
12.0(26)S
12.2(33)SRA
12.2(33)SXH

The MPLS Traffic Engineering—Fast Reroute MIB provides SNMP-based network management of the Multiprotocol Label Switching (MPLS) Fast Reroute (FRR) feature in Cisco IOS software.

In 12.0(10)ST, the Fast Reroute link protection feature was introduced.

In 12.0(16)ST, link protection for Cisco series 7200 and 7500 platforms was added.

In 12.0(22)S, Fast Reroute enhancements, including node protection, were added.

In 12.0(26)S, support for the IETF MIB draft-ietf-mpls-fastreroute-mib-02.txt, which provides network management for the FRR feature, was added.

In 12.2(33)SRA, support for cmplsFrrLogTableCurrEntries and cmplsFrrNotifMaxRate was added. The cmplsFrrLogTable is not supported.

Support for 12.2(33)SXH was added.


Glossary

Cisco Express Forwarding—An advanced Layer 3 IP switching technology. Cisco Express Forwarding optimizes network performance and scalability for networks with large and dynamic traffic patterns.

index—A method of uniquely identifying a tunnel.

instance—An occurrence. An object can have one or more instances.

IS-IS—Intermediate System-to-Intermediate System. OSI link-state hierarchical routing protocol based on DECnet Phase V routing whereby ISs (routers) exchange routing information based on a single metric to determine network topology.

label—A short, fixed-length data construct that tells switching nodes how to forward data (packets or cells).

LFIB—Label Forwarding Information Base. The data structure for storing information about incoming and outgoing tags (labels) and associated equivalent packets suitable for labeling.

LSR—label switching router. A device that forwards MPLS packets based on the value of a fixed-length label encapsulated in each packet.

MIB—Management Information Base. A database of network management information that is used and maintained by a network management protocol such as Simple Network Management Protocol (SNMP). The value of a MIB object can be changed or retrieved by using SNMP commands, usually through a network management system. MIB objects are organized in a tree structure that includes public (standard) and private (proprietary) branches.

NMS—network management station. A powerful, well-equipped computer (typically an engineering workstation) that is used by a network administrator to communicate with other devices in the network. An NMS is typically used to manage network resources, gather statistics, and perform a variety of network administration and configuration tasks.

notification—A message sent by a Simple Network Management Protocol (SNMP) agent to a network management station, console, or terminal to indicate that a significant event within Cisco IOS software has occurred.

object—A variable that has a specific instance associated with it.

OSPF—Open Shortest Path First. Link-state, hierarchical Interior Gateway Protocol (IGP) routing algorithm proposed as a successor to Routing Information Protocol (RIP) in the Internet community. OSPF features include least-cost routing, multipath routing, and load balancing. OSPF was derived from an early version of the IS-IS protocol.

RSVP—Resource Reservation Protocol. Protocol for reserving network resources to provide quality of service (QoS) guarantees to application flows.

scalar object—Objects that are not instances. A scalar object has one instance.

SNMP—Simple Network Management Protocol. A network management protocol used almost exclusively in TCP/IP networks. SNMP provides a means to monitor and control network devices, manage configurations, collect statistics, monitor performance, and ensure network security.

SNMP agent—A managed node or device. The router that has the MIB implementation on it.


Note See the Internetworking Terms and Acronyms for terms not included in this glossary.