Enterasys SecureStack C2 User Manual

Configuring IGMP at Layer 2
11-2 IGMP Configuration
About Multicasting
Multicastingisusedtosupportreal‐timeapplicationssuchasvideoconferencesorstreaming
audio.Amulticastserverdoesnothavetoestablishaseparateconnectionwitheachclient.It
merelybroadcastsitsservicetothenetwork,andanyhoststhatwanttoreceivethemulticast
registerwiththeirlocalmulticast
switch/router.Althoughthisapproachreducesthenetwork
overheadrequiredbyamulticastserver,thebroadcasttrafficmustbecarefullyprunedatevery
multicastswitch/routeritpassesthroughtoensurethattrafficisonlypassedtothehoststhat
subscribedtothisservice.
TheSecureStackC2switchdeviceusesIGMP(InternetGroup
ManagementProtocol)toqueryfor
anyattachedhostswhowanttoreceiveaspecificmulticastservice.ThedevicelooksuptheIP
MulticastGroupusedforthisserviceandaddsanyportthatreceivedasimilarrequesttothat
group.Itthenpropagatestheservicerequestontoanyneighboring
multicastswitch/routerto
ensurethatitwillcontinuetoreceivethemulticastservice.
Configuring IGMP at Layer 2
Purpose
ToconfigureIGMPsnoopingfromtheswitchCLI.
Commands
show igmpsnooping
UsethiscommandtodisplayIGMPsnoopinginformation.
Syntax
show igmpsnooping
For information about... Refer to page...
show igmpsnooping 11-2
set igmpsnooping adminmode 11-3
set igmpsnooping interfacemode 11-4
set igmpsnooping groupmembershipinterval 11-4
set igmpsnooping maxresponse 11-5
set igmpsnooping mcrtrexpiretime 11-5
set igmpsnooping add-static 11-6
set igmpsnooping remove-static 11-7
show igmpsnooping static 11-7
show igmpsnooping mfdb 11-8
clear igmpsnooping 11-8

Enterasys SecureStack C2 Specifications

General

Brand	Enterasys
Model	SecureStack C2
Category	Switch
Language	English