Reference Guide

ip pim graceful-restart
This feature permits configuration of non-stop forwarding (NSF or graceful restart) capability of a PIM
router to its neighbors.
S5000
Syntax
[ipv6] ip pim graceful-restart {helper-only | nsf [restart-time
| stale-entry-time]}
Parameters
ipv6 Enter the keyword ipv6 to enable graceful-restart for the
IPv6 multicast routes.
helper-only Enter the keywords 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 nsf to configure the non-stop forwarding
capability.
restart-time (OPTIONAL) Enter the keywords restart-time followed by
the number of seconds estimated for the PIM speaker to
restart. The range is 30 to 300 seconds. The default is 180
seconds.
stale-entry-
time
(OPTIONAL) Enter the keywords stale-entry-time
followed by the number of seconds for which entries are
kept alive after restart. The range is 30 to 300 seconds. The
default is 60 seconds.
Defaults as above
Command
Modes
CONFIGURATION
Command
History
Version 9.0(1.3) Introduced on the S5000.
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 discard the unknown Hello option and
adjacency is not affected.
When an NSF-capable router goes down, the neighboring PIM speaker preserves
the states and continues the forwarding of multicast traffic while the neighbor
router restarts.
1048
PIM-Sparse Mode (PIM-SM)