PurposeCommand or Action
Installs all routes tagged with the value 3 first.spf prefix-priority [ level { 1 | 2 }] { critical | high |
medium } { access-list-name | tag tag }
Step 5
Example:
RP/0/RSP0/CPU0:router(config-isis-af)# spf
prefix-priority high tag 3
commit
Step 6
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
be enabled on the interface under IS-IS.
Note
Before You Begin
IPFRR is supported on the Cisco IOS XR. IPv4 address families and single-level interfaces are supported.
Multiprotocol Label Switching (MPLS) FRR and IPFRR cannot be configured on the same interface
simultaneously.
Note
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
388
Implementing IS-IS
Configuring IP Fast Reroute Loop-free Alternate
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