Igmp Groups; Igmpv3 Snooping - Lenovo RackSwitch G8264 Application Manual

4. Verify the configuration.

IGMP Groups

IGMPv3 Snooping

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RS G8264# show ip igmp querier vlan 2
Current IGMP snooping Querier information:
IGMP Querier information for vlan 2:
Other IGMP querier ­ none
Switch­querier enabled, current state: Querier
Switch­querier type: Ipv4, address 10.10.10.1,
Switch­querier general query interval: 125 secs,
Switch­querier max­response interval: 100 'tenths of secs',
Switch­querier startup interval: 31 secs, count: 2
Switch­querier robustness: 2
IGMP configured version is v3
IGMP Operating version is v3
One IGMP entry is allocated for each unique join request, based on the VLAN and
IGMP group address. If multiple ports join the same IGMP group using the same
VLAN, only a single IGMP entry is used.
IGMPv3 includes new Membership Report messages that extend IGMP
functionality. The switch provides snooping capability for all types of IGMPv3
Membership Reports.
IGMPv3 is supported in stand‐alone (non‐stacking) mode only.
IGMPv3 supports Source‐Specific Multicast (SSM). SSM identifies session traffic by
both source and group addresses.
The IGMPv3 implementation keeps records on the multicast hosts present in the
network. If a host is already registered, when it receives a new IS_INC, TO_INC,
IS_EXC, or TO_EXC report from same host, the switch makes the correct transition
to new (port‐host‐group) registration based on the IGMPv3 RFC. The registrations
of other hosts for the same group on the same port are not changed.
The G8264 supports the following IGMPv3 filter modes:
 INCLUDE mode: The host requests membership to a multicast group and pro‐
vides a list of IPv4 addresses from which it wants to receive traffic.
EXCLUDE mode: The host requests membership to a multicast group and provides a

list of IPv4 addresses from which it does not want to receive traffic. This indicates that
the host wants to receive traffic only from sources that are not part of the Exclude list.
To disable snooping on EXCLUDE mode reports, use the following command:
#
RS G8264(config) no ip igmp snoop igmpv3 exclude
By default, the G8264 snoops the first eight sources listed in the IGMPv3 Group
Record. Use the following command to change the number of snooping sources:
#
RS G8264(config) ip igmp snoop igmpv3 sources <1‐64>
Chapter 32: Internet Group Management Protocol
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