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Implementing IS-IS on Cisco IOS XR Software
How to Implement IS-IS on Cisco IOS XR Software
RC-303
Cisco IOS XR Routing Configuration Guide
OL-14356-01
Customizing Routes for IS-IS
This task explains how to perform route functions that include injecting default routes into your IS-IS
routing domain and redistributing routes learned in another IS-IS instance. This task is optional.
SUMMARY STEPS
1. configure
2. router isis instance-id
3. set-overload-bit [on-startup {delay | wait-for-bgp}] [level {1 | 2}]
4. address-family {ipv4 | ipv6} [unicast | multicast]
5. default-information originate [route-policy route-policy-name]
6. redistribute isis instance [level-1 | level-2 | level-1-2] [metric metric] [metric-type {internal |
external}] policy policy-name]
7. summary-prefix address/prefix-length [level {1 | 2}]
or
summary-prefix ipv6-prefix/prefix-length [level {1 | 2}]
Step 6
end
or
commit
Example:
RP/0/RP0/CPU0:router(config-isis-af)# end
or
RP/0/RP0/CPU0:router(config-isis-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.
Step 7
show isis [instance instance-id] [[ipv4 | ipv6
| afi-all] [unicast | multicast | safi-all]]
spf-log [level {1 | 2}] [ispf | fspf | prc |
nhc] [detail | verbose] [last number | first
number]
Example:
RP/0/RP0/CPU0:router# show isis instance 1
spf-log ipv6
(Optional) Displays how often and why the router has run a
full SPF calculation.
Command or Action Purpose