Chapter 39 Remote Loop-Free Alternate - Fast Reroute

How to Configure Remote Loop-Free Alternate - Fast Reroute

repair: attached-nexthop 6.6.6.6 MPLS-Remote-Lfa1 (12C55D24)

path 12C55D24, path list 12C856E8, share 1/1, type attached nexthop, for IPv4, flags repair, repair-only

nexthop 6.6.6.6 MPLS-Remote-Lfa1, repair, adjacency IP midchain out of MPLS-Remote-Lfa1

12D512C0

output chain: label [none23] FRR Primary (0xA74F800)

<primary: IP adj out of Vlan4004, addr 71.14.1.4 1139FAA0>

<repair: TAG midchain out of MPLS-Remote-Lfa1 11180740 label 366 TAG adj out of Vlan4003, addr 71.17.1.7 12D51520>

To display information about IS-IS FRR configurations, use the following show command.

Router#

show isis

fast-reroute summary

 

Tag null:

 

 

 

 

IPv4 Fast-Reroute

Protection Summary:

 

Prefix

Counts:

 

Total

Protected

Coverage

High

priority:

 

0

0

0%

Normal priority:

10

8

80%

Total:

 

10

8

80%

To display paths for a specific route or for all routes under a major network that are stored in the IP local Routing Information Base (RIB), use the following show command.

Router# show isis rib 171.1.1.0

IPv4 local RIB for IS-IS process

IPV4 unicast topology base (TID 0, TOPOID 0x0) =================

Repair path attributes:

DS - Downstream, LC - Linecard-Disjoint, NP - Node-Protecting

PP- Primary-Path, SR - SRLG-Disjoint

Routes under majornet 171.1.0.0/16:

171.1.1.0/24

[115/L1/10] via 71.14.1.4(Vlan4004), from 71.14.1.4, tag 0, LSP[2/18] (installed)

repair path: 6.6.6.6(MPLS-Remote-Lfa1) metric:20 (DS,SR) LSP[2]

Verifying Remote LFA-FRR Configuration for EoMPLS on a GigabitEthernet Interface

To verify the remote LFA-FRR configuration for EoMPLS on a GigabitEthernet interface, use the show commands described in the following examples.

Router# show mpls l2transport vc 1 detail

Local interface: Gi0/0 up, line protocol up, Ethernet up

Destination address: 3.3.3.3, VC ID: 1, VC status: up

Output interface: Vl4000, imposed label stack {18 16}

Preferred path: not configured

Default path: active

Next hop: 71.12.1.2

 

 

 

Create time: 00:00:06, last status

change time: 00:00:06

 

 

 

Last label FSM state change

time: 00:00:06

 

 

 

Signaling protocol: LDP, peer

3.3.3.3:0 up

 

 

 

Targeted

Hello: 1.1.1.1(LDP

Id) -> 3.3.3.3, LDP is UP

 

 

 

Graceful

restart: not configured

and not enabled

 

 

 

Non stop

routing: not configured

and not enabled

 

 

 

Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide

 

 

 

 

39-30

 

 

 

 

OL-23826-09

 

 

 

 

 

 

 

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Image 796
Cisco Systems A9014CFD manual 39-30, Router# show isis rib, Router# show mpls l2transport vc 1 detail