Command Line Reference Guide

PIM-Sparse Mode (PIM-SM) | 763
Usage
Information
The router with the largest value assigned to an interface becomes the Designated Router. If two
interfaces contain the same DR priority value, the interface with the largest interface IP address
becomes the Designated Router.
ip pim graceful-restart
e
This feature permits configuration of Non-stop Forwarding (NFS or graceful restart) capability of a PIM
router to its neighbors.
Syntax
[ipv6] ip pim graceful-restart {helper-only | nsf [restart-time | stale-entry-time]}
Parameters
Defaults
as above
Command Modes
CONFIGURATION
Command
History
Usage
Information
When an NSF-capable router comes up, it announces the graceful restart capability and restart duration
as a Hello option. The receiving router notes the Hello option. Routers not NSF capable will discard
the unknown Hello option and adjacency is not affected.
When an NSF-capable router goes down, neighboring PIM speaker preserves the states and continues
the forwarding of multicast traffic while the neighbor router restarts.
ip pim join-filter
c e s
Permit or deny PIM Join/Prune messages on an interface using an extended IP access list. This
command prevents the PIM SM router from creating state based on multicast source and/or group.
Syntax
ip pim join-filter ext-access-list {in | out}
Remove the access list using the command no ip pim join-filter ext-access-list {in | out}
ipv6
Enter this keyword to enable graceful-restart for IPv6 Multicast Routes.
helper-only Enter the keyword helper-only to configure as a receiver (helper) only by
preserving the PIM status of a graceful restart PIM neighboring router.
nsf
Enter the keyword nfs to configure the Non-stop Forwarding capability.
restart-time (OPTIONAL) Enter the keyword restart-time followed by the number of
seconds estimated for the PIM speaker to restart.
Range: 30 to 300 seconds
Default: 180 seconds
stale-entry-time (OPTIONAL) Enter the keyword stale-entry-time followed by the number of
seconds for which entries are kept alive after restart.
Range: 30 to 300 seconds
Default: 60 seconds
Version 8.2.1.0
Introduced on E-Series ExaScale. Added the
ipv6 option for E-Series.
Version 7.6.1.0 Introduced on E-Series