Cisco NCS 6000 Series User Manual

• 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
LFA computations are enabled for all routes and FRR is enabled for all supported interfaces.
Note
SUMMARY STEPS
1. configure
2. router isis process-id
3. is-type{ level-1 | level-1-2 | level-2-only }
4. net net
5. address-family {ipv4 | ipv6} [unicast | multicast]
6. metric-style wide
7. exit
8. interface Bundle-Ether bundle-id
9. address-family {ipv4 | ipv6} [unicast | multicast]
10. fast-reroute per-prefix
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure
Example:
Step 1
RP/0/RP0/CPU0:router# configure
Enables IS-IS routing for the specified routing instance,
and places the router in router configuration mode. By
router isis process-id
Example:
Step 2
default, all IS-IS instances are automatically at Level 1
RP/0/RP0/CPU0:router(config-if)# router isis core
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).
is-type{ level-1 | level-1-2 | level-2-only }
Example:
Step 3
By default, every IS-IS instance acts as a level-1-2 router.
RP/0/RP0/CPU0:router(config-isis)#is-type
level-2-only
• The level-1 keyword configures the software to
perform only Level 1 (intra-area) routing. Only Level
1 adjacencies are established. The software only
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
348
Implementing IP Fast Reroute Loop-Free Alternate
Configuring Fast Reroute Support

Cisco NCS 6000 Series Specifications

General

Brand	Cisco
Model	NCS 6000 Series
Category	Network Router
Language	English