Protocol Independent Multicast - Avaya Secure Router 3120 Command Reference Manual

Protocol Independent Multicast

PIM is protocol independent because it depends on existing unicast routes to calculate the
reverse path forwarding. PIM has evolved into numerous modes. The following modes are
supported in this release:
Example
• Protocol Independent Multicast-Sparse Mode (PIM-SM)
• Protocol Independent Multicast-Source-Specific Multicast (PIM-SSM)
There are two versions of the PIM-SM protocol. PIM-SM version 1 is documented in RFC 2117.
PIM-SM version 2 was constructed to address some of the shortcomings of PIM-SM version
1. This release implements only version 2 (RFC 2362).
ip pim
This is a mode command to enter PIM mode. PIM mode configures the PIM router to operate in
either sparse mode or dense mode. The default is sparse mode PIM. Use the no form of this
command to disable PIM globally.
syntax:
[no] pim
example:
To access PIM mode, enter:
SR/configure/ip> pim SR/configure/ip/pim>
applies to:
All modules
ip pim assert-holdtime
Specifies the number of seconds that Assert state should be maintained in the absence of a
refreshing Assert message. When a PIM router receives an Assert message, it modifies the
outgoing interface list for a (*,G) or (S, G) entry, as specified by the message. The lifetime of
this modification is specified by this command. If another Assert message does not refresh the
Assert state before the lifetime expires, then the outgoing interface list reverts to its previous
Avaya Secure Router 3120 Command Reference Guide
Protocol Independent Multicast
December 2010 769