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Implementing IS-IS on Cisco IOS XR Software
How to Implement IS-IS on Cisco IOS XR Software
RC-307
Cisco IOS XR Routing Configuration Guide
OL-14356-01
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 process, and
places the router in router configuration mode.
• By default, all IS-IS instances are automatically
Level 1 and Level 2. You can change the level of
routing to be performed by a particular routing instance
by using the is-type command.
Step 3
interface type number
Example:
RP/0/RP0/CPU0:router(config-isis)# interface
POS 0/1/0/3
Enters interface configuration mode.
Step 4
address-family ipv4 unicast
Example:
RP/0/RP0/CPU0:router(config-isis-if)#
address-family ipv4 unicast
Specifies the IPv4 address family and enters router address
family configuration mode.
Step 5
mpls ldp sync [level {1 | 2}]
Example:
RP/0/RP0/CPU0:router(config-isis-if-af)# mpls
ldp sync level 1
Enables MPLS LDP synchronization for the IPv4 address
family under interface POS 0/1/0/3.
Step 6
end
or
commit
Example:
RP/0/RP0/CPU0:router(config-isis-if-af)# end
or
RP/0/RP0/CPU0:router(config-isis-if-af)# commit
Saves configuration changes.
• When you issue the end command, the system prompts
you to commit changes:
Uncommitted changes found, commit them before
exiting(yes/no/cancel)?
[cancel]:
–
Entering yes saves configuration changes to the
running configuration file, exits the configuration
session, and returns the router to EXEC mode.
–
Entering no exits the configuration session and
returns the router to EXEC mode without
committing the configuration changes.
–
Entering cancel leaves the router in the current
configuration session without exiting or
committing the configuration changes.
• Use the commit command to save the configuration
changes to the running configuration file and remain
within the configuration session.