Ethernet Switch CLI Reference Guide
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CHAPTER 26
IGMP and Multicasting
Commands
This chapter explains how to use commands to configure the Internet Group Membership
Protocol (IGMP) on the Switch. It also covers configuring the ports to remove the VLAN tag
from outgoing multicast packets on the Switch.
26.1 IGMP Overview
The Switch supports IGMP version 1 (IGMP-v1), version 2 (IGMP-v2) and IGMP version 3
(IGMP-v3). Refer to RFC 1112, RFC 2236 and RFC 3376 for information on IGMP versions
1, 2 and 3 respectively. At start up, the Switch queries all directly connected networks to
gather group membership. After that, the Switch periodically updates this information.
26.2 Command Summary
The following section lists the commands for this feature.
Table 65 IGMP Command Summary
COMMAND DESCRIPTION M P
router igmp Enables and enters the IGMP configuration
mode.
C13
exit Leaves the IGMP configuration mode. C 13
non-querier Sets the Switch to Non-Querier mode. (If the
Switch discovers a multicast router with a
lower IP address, it will stop sending Query
messages on that network.)
C13
no non-querier Disables non-querier mode on the Switch, (the
multicast router always sends Query
messages).
C13
unknown-multicast-frame
<drop|flooding>
Specifies the action the Switch should perform
when it receives unknown multicast frames.
C13
no router igmp Disables IGMP on the Switch. C 13
interface route-domain <ip-address>/<mask-
bits>
Enters the configuration mode for the specified
routing domain.
C13
ip igmp <v1|v2|v3> Enables IGMP in this routing domain and
specifies the version of the IGMP packets that
the Switch should use.
C13
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