Configuring Multicast Nonstop Forwarding - Cisco XR 12000 Series Configuration Manual

How to Implement Multicast Routing
Command or Action
Step 6
end
or
commit
Example:
RP/0/0/CPU0:router(config-mcast-default-
ipv4)# end
or
RP/0/0/CPU0:router(config-mcast-default-
ipv4)# commit
Step 7
show mfib [vrf vrf-name] [ipv4 | ipv6] route
[rate | statistics] [* | source-address]
[group-address [/prefix-length] [detail |
old-output] | summary] [location node-id]
Example:
RP/0/0/CPU0:router# show mfib vrf 12 route
statistics location 0/1/cpU0

Configuring Multicast Nonstop Forwarding

This task configures the nonstop forwarding (NSF) feature for multicast packet forwarding for the
purpose of alleviating network failures, or software upgrades and downgrades.
Although we strongly recommend that you use the NSF lifetime default values, the optional
through
and Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD). Use these
commands when PIM and IGMP or MLD are configured with nondefault interval or query intervals for
join and prune operations.
Generally, configure the IGMP NSF and PIM NSF lifetime values to equal or exceed the query or join
query interval. For example, if you set the IGMP query interval to 120 seconds, set the IGMP NSF
lifetime to 120 seconds (or greater).
If the Cisco IOS XR software control plane does not converge and reconnect after NSF is enabled on
your router, multicast packet forwarding continues for up to 15 minutes, then packet forwarding stops.
Multicast Configuration Guide
MCC-36
Implementing Multicast Routing on Cisco IOS XR Software Cisco ASR 9000 Series Routers
Step 9 allow you to modify the NSF timeout values for Protocol Independent Multicast (PIM)
Purpose
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.
Displays route entries in the Multicast Forwarding
Information Base (MFIB) table.
When the rate keyword is used with the source- and
•
group-address, the command displays the cumulative
rates per route for all line cards in the Multicast
Forwarding Information Base (MFIB) table.
When the statistics keyword is used, the command
•
displays the rate per route for one line card in the
Multicast Forwarding Information Base (MFIB) table.
Step 4
OL-