Configuring Fast Reroute Support - Cisco NCS 6000 Series Configuration Manual

Configuring Fast Reroute Support

• Lowest-repair-path-metric—Eliminates candidates whose metric to the protected prefix is higher.
• Node protecting—Eliminates candidates that are not node protected.
• Primary-path—Eliminates candidates that are not ECMPs.
• Secondary-path—Eliminates candidates that are ECMPs.
Configuring Fast Reroute Support
Note
LFA computations are enabled for all routes and FRR is enabled for all supported interfaces.
SUMMARY STEPS
1.
2.
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10.
DETAILED STEPS
Command or Action
Step 1 configure
Example:
RP/0/RP0/CPU0:router# configure
Step 2 router isis process-id
Example:
RP/0/RP0/CPU0:router(config-if)# router isis core
Step 3
is-type{ level-1 | level-1-2 | level-2-only }
Example:
RP/0/RP0/CPU0:router(config-isis)#is-type
level-2-only
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
348
configure
router isis process-id
is-type{ level-1 | level-1-2 | level-2-only }
net net
address-family {ipv4 | ipv6}
metric-style wide
exit
interface Bundle-Ether bundle-id
address-family {ipv4 | ipv6}
fast-reroute per-prefix
Implementing IP Fast Reroute Loop-Free Alternate
[unicast | multicast]
[unicast | multicast]
Purpose
Enters global configuration mode.
Enables IS-IS routing for the specified routing instance,
and places the router in router configuration mode. By
default, all IS-IS instances are automatically at Level 1
and Level 2. You can change this level by a particular
routing instance using the is-type router configuration
command.
(Optional) Configures the system type (area or backbone
router).
By default, every IS-IS instance acts as a level-1-2 router.
• The level-1 keyword configures the software to
perform only Level 1 (intra-area) routing. Only Level
1 adjacencies are established. The software only