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Implementing IS-IS on Cisco IOS XR Software
How to Implement IS-IS on Cisco IOS XR Software
RC-111
Cisco IOS XR Routing Configuration Guide
Restrictions
MPLS traffic engineering currently supports only a single IS-IS level and does not support routing and
signaling of LSPs over unnumbered IP links. Therefore, do not configure the feature over those links.
SUMMARY STEPS
1. configure
2. router isis instance-id
3. address-family {ipv4 | ipv6} [unicast]
4. mpls traffic-eng level {1 | 2}
5. mpls traffic-eng router-id {ip-address | interface-name}
6. metric-style wide [level {1 | 2}]
7. end
or
commit
8. show isis [instance instance-id] mpls traffic-eng tunnel
9. show isis [instance instance-id] mpls traffic-eng adjacency-log
10. show isis [instance instance-id] mpls traffic-eng advertisements
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Enters global configuration mode.
Step 2
router isis
instance-id
Example:
RP/0/RP0/CPU0:router(config)# router isis isp
Enables IS-IS routing for the specified routing instance, and
places the router in router configuration mode.
• You can change the level of routing to be performed by
a particular routing instance using the is-type router
configuration command.
Step 3
address-family {ipv4 | ipv6} [unicast]
Example:
RP/0/RP0/CPU0:router(config-isis)#
address-family ipv6 unicast
Specifies the IPv4 or IPv6 address family, and enters router
address family configuration mode.
• This example specifies the unicast IPv6 address family.
Step 4
mpls traffic-eng level {1 | 2}
Example:
RP/0/RP0/CPU0:router(config-isis-af)# mpls
traffic-eng level 1
Configures a router running IS-IS to flood MPLS TE link
information into the indicated IS-IS level.