Enterasys Networks 9034313-07 Configuring PIM-SM

Configuring PIM-SM

SecureStack C3 Configuration Guide 20-49

Configuring PIM-SM

Enterasys Networksrecommendsthatadministratorsconsiderthefollowingrecommendations

beforeconfiguringtheSecureStackC3foraPIM‐SMenvironment.

•ASecureStackC3cannotbeconfiguredasaCandidate‐RPoraCandidate‐BSR.

•ASecureStackC3shouldnotbethefirsthoprouterforamulticaststream.Inotherwords,the

multicaststreamshouldnotoriginateonaSecureStackC3.

•ASecureStackC3shouldnotbepositionedinthecoreofaPIM‐SMtopology,andshould

onlybepositionedattheedgeinaPIM‐SMtopology.Inotherwords,theSecureStackC3

shouldonlybeusedtodelivermulticaststreamstoendclients.

Purpose

ToenableandconfigureProtocolIndependentMulticastinSparseMode(PIM‐SM).Thisprotocol

providesthemeansofdynamicallylearninghowtoforwardmulticasttrafficinanenvironment

wheregroupmembersaresparselylocatedthroughoutthenetworkandbandwidthislimited.In

situationswheremembersaredenselylocatedandbandwidthisplentiful,DVMRPwouldsuffice

(see“ConfiguringDVMRP”onpage20‐33.)

PIM‐SMdeterminesthenetworktopologyusingtheunderlyingunicastroutingprotocoltobuild

aMulticastRoutingInformationBase(MRIB).

Commands

* Advanced License Required *

PIM-SM is an advanced routing feature that must be enabled with a license key. If you have purchased an

advanced license key, and have enabled routing on the device, you must activate your license as described in

the chapter entitled “Activating Licensed Features” in order to enable the PIM-SM command set. If you wish

to purchase an advanced routing license, contact Enterasys Networks Sales.

Note: An Enterasys Networks Feature Guide document containing an in-depth discussion of

multicast configuration is located on the Enterasys Networks web site:

http://www.enterasys.com/support/manuals/

Note: IGMP must be enabled on all VLANs running PIM-SM, and must also be globally enabled

on the SecureStack C3. For details on enabling IGMP, refer to Chapter13.

For information about... Refer to page...

Global configuration commands

ip pimsm 20-50

ip pimsm staticrp 20-50

Interface configuration commands

ip pimsm enable 20-51

ip pimsm query-interval 20-52