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Syntax: ip multicast-nonstop-routing
During a hitless upgrade and switchover, this syslog message is generated on the CLI. The message
displayed depends on which version of PIM is configured.
PIM v4 is configured
MCASTv4 protocol receives switchover event
Mcastv4 protocol switchover done
PIM v6 is configured
MCASTv6 protocol receives switchover event
Mcastv6 protocol switchover done
The syslog message shows the state transition of multicast NSR as the standby module takes over as
the active module. The multicast data traffic will continue to flow during state transition.
Displaying the multicast NSR status
To display the multicast nonstop routing (NSR) status, enter the following command:
Device# show ip pim nsr
Global Mcast NSR Status
NSR: ON
Switchover In Progress Mode: FALSE
The following table displays the output from the show ip pim nsr command.
Field
Description
NSR
The NSR field indicates whether the ip multicast-nonstop-routing command is
enabled (ON) or disabled (OFF).
Switchover in Progress
Mode
The Switchover in Progress Mode field indicates whether the multicast traffic is in the
middle of a switchover (displaying a TRUE status), or not (displaying a FALSE status).
Displaying counter and statistic information for multicast NSR
To display multicast NSR counter and statistic information, enter the following command.
device#show ip pim counter nsr
Mcache sync (entity id: 203)
pack: 0
unpack: 0
ack: 0
RPset sync (entity id: 201)
pack: 0
unpack: 0
ack: 0
BSR status (entity id: 202)
pack: 1
unpack: 0
ack: 1
Syntax: show ip pim [vrf vrf_name ] counter nsr
Displaying the multicast NSR status
FastIron Ethernet Switch IP Multicast Configuration Guide 77
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