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Implementing OSPF on Cisco IOS XR Software
How to Implement OSPF on Cisco IOS XR Software
RC-236
Cisco IOS XR Routing Configuration Guide
OL-14356-01
Enabling Nonstop Routing for OSPFv2
This optional task describes how to enable nonstop routing (NSR) for OSPFv2 processes. NSR is
disabled by default. When NSR is enabled, OSPF processes on active RP, synchronize all necessary data
and states with the OSPF process on the standby RP. When the switchover happens, OSPF processes on
newly active RP has all the necessary data and states to continue running and does not require any help
from its neighbors.
Summary Steps
1. configure
2. router ospf instance-id
3. nsr
4. end
or
commit
Step 11
sham-link source-address destination-address
Example:
RP/0/RP0/CPU0:router(config-ospf-vrf-ar)#
sham-link 10.0.0.1 10.0.0.3
Configures a point-to-point unnumbered interface between
two VPN sites.
Step 12
cost cost
Example:
RP/0/RP0/CPU0:router(config-ospf-vrf-ar-sl)#
cost 76
Explicitly specifies the cost of sending a packet on an OSPF
interface. The specified cost overrides the auto-costing
calculated default value for interfaces.
Step 13
end
or
commit
Example:
RP/0/RP0/CPU0:router(config-ospf-vrf-ar)# end
or
RP/0/RP0/CPU0:router(config-ospf-vrf-ar)#
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.
Command or Action Purpose