Lenovo ThinkSystem NE2552E, Application Manual

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© Copyright Lenovo 2018 Chapter 25: Internet Group Management Protocol
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IGMP Groups
The NE2552E supports a maximum of 3072 IGMP entries, on a maximum of 1024
(1022 in stacking mode) VLANs. One IGMP entry is allocated for each unique join
request, based on the VLAN and IGMP group address only (regardless of the
port). If multiple ports join the same IGMP group using the same VLAN, only a
single IGMP entry is used.
IGMPv3
IGMPv3 includes new membership report messages to extend IGMP functionality.
The NE2552E provides snooping capability for all types of IGMP version 3
(IGMPv3) Membership Reports, as described in RFC 3376.
IGMPv3 supports Source ‐ Specific Multicast (SSM). SSM identifies session traffic by
both source and group addresses. The NE2552E uses source filtering , which allows
hosts to report interest in receiving multicast packets only from specific source
addresses, or from all but specific source addresses.
The NE2552E supports the following IGMPv3 filter modes:
 INCLUDE mode: The host requests membership to a multicast group and
provides 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:
NE2552E(config)# no ip igmp snoop igmpv3 exclude
By default, the NE2552E snoops the first eight sources listed in the IGMPv3 Group
Record. Use the following command to change the number of snooping sources:
IGMPv3 Snooping is compatible with IGMPv1 and IGMPv2 Snooping. You can
disable snooping on version 1 and version 2 reports, using the following
command:
NE2552E(config)# ip igmp snoop igmpv3 sources
<1 ‐ 64>
NE2552E(config)# no ip igmp snoop igmpv3 v1v2