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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter39 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 [none|23]
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