Cisco ASR 9000 Series Configuration Manual page 347

Implementing IS-IS
DETAILED STEPS
Command or Action
Step 1
configure
Step 2 router isis instance-id
Example:
RP/0/RSP0/CPU0:router(config)# router isis isp
Step 3 interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-isis)# interface
GigabitEthernet 0/1/0/3
Step 4
circuit-type { level-1 | level-1-2 | level-2-only }
Example:
RP/0/RSP0/CPU0:router(config-isis-if)# circuit-type
level-1
Step 5
address-family { ipv4 | ipv6 } [ unicast ]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)# address-family ipv4
unicast
Step 6
fast-reroute {per-link | per-prefix}
Example:
RP/0/RSP0/CPU0:router8(config-isis-if-af)# fast-reroute
per-link
Step 7 Do one of the following:
• fast-reroute per-link { level { 1 | 2 }}
• fast-reroute per-prefix { level { 1 | 2 }}
Example:
RP/0/RSP0/CPU0:router(config-isis-if-af)#fast-reroute
per-link level 1
Or
RP/0/RSP0/CPU0:router(config-isis-if-af)#fast-reroute
per-prefix level 2
OL-30423-03
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
Configuring IP/LDP Fast Reroute
Purpose
Enables IS-IS routing for the specified routing
process, and places the router in router
configuration mode. In this example, the IS-IS
instance is called isp.
Enters interface configuration mode.
(Optional) Configures the type of adjacency.
Specifies the address family, and enters router
address family configuration mode.
• This example specifies the unicast IPv4
address family.
Specifies fast-reroute computation on per-link or
per-prefix basis.
• per-link—Used for prefix independent
per-link computation.
• per-prefix—Used for prefix dependent
computation.
Configures fast-reroute per-link or per-prefix
computation for one level; use either level 1 or
level 2.
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