Configuring Ip Fast Reroute Loop-Free Alternate - Cisco ASR 9000 Series Routing Configuration Manual

Configuring IP Fast Reroute Loop-free Alternate

Command or Action
Step 5
spf prefix-priority [ level { 1 | 2 }] { critical | high |
medium } { access-list-name | tag tag }
Example:
RP/0/RSP0/CPU0:router(config-isis-af)# spf
prefix-priority high tag 3
Step 6 commit
Configuring IP Fast Reroute Loop-free Alternate
This optional task describes how to enable the IP fast reroute (IPFRR) loop-free alternate (LFA) computation
to converge traffic flows around link failures.
To enable node protection on broadcast links, IPFRR and bidirectional forwarding detection (BFD) must
Note
be enabled on the interface under IS-IS.
Before You Begin
IPFRR is supported on the Cisco IOS XR. IPv4 address families and single-level interfaces are supported.
Note
Multiprotocol Label Switching (MPLS) FRR and IPFRR cannot be configured on the same interface
simultaneously.
SUMMARY STEPS
1. configure
2. router isis instance-id
3. interface type interface-path-id
4. circuit-type { level-1 | level-1-2 | level-2-only }
5. address-family ipv4 unicast
6. ipfrr lfa { level { 1 | 2 }}
7. ipfrr lfa exclude interface type interface-path-id
8. commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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Purpose
Installs all routes tagged with the value 3 first.
Implementing IS-IS