Igmp Snooping - Supermicro SSE-G48-TG4 Reference Manual

Super Micro Intelligent Switch Command Line Interface User Guide

14 IGMP Snooping

IGMP (Internet Group Multicast Protocol), is the protocol a host uses to inform a router when it
joins (or leaves) an Internet multicast group. IGMP is only used on a local network; a router must
use another multicast routing protocol to inform other routers of group membership. IGS (IGMP
Snooping), is a feature that allows the switch to "listen in" on the IGMP conversation between
hosts and routers. In IGS, a host computer uses IGMP to inform a router that it intends to listen to
a specific multicast address. If another computer snoops such packets, the other computer can
learn the multicast sessions to which other computers on the local network are listening. IGMP
snooping significantly reduces traffic from streaming media and other bandwidth-intensive IP
multicast applications.
The list of CLI commands for the configuration of IGS are common to both Single Instance
and Multiple Instance except for a difference in the prompt that appears for the Switch with
Multiple Instance support.
The prompt for the Global Configuration Mode is,
SMIS(config-switch)#
The parameters specific to Multiple Instance are stated so, against the respective parameter
descriptions in this document.
The output of the Show commands differ for Single Instance and Multiple Instance. Hence
both the output are documented while depicting the show command examples.
The list of CLI commands for the configuration of IGS is as follows:
ip igmp snooping
ip igmp snooping proxy-reporting
snooping multicast-forwarding-mode
ip igmp snooping mrouter-time-out
ip igmp snooping port-purge-interval
ip igmp snooping report-suppression interval
ip igmp snooping retry-count
ip igmp snooping group-query-interval
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