Manual

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flooding through IGMP Snooping, multicast traffic is forwarded to ports associated to multicast
devices only. The switch listens to the IGMP messages between the multicast router and hosts,
and maintains multicast group forwarding table based on the listening result, and can then
decide to forward multicast packets according to the forwarding table.
Switch provides IGMP Snooping and is able to send a query from the switch so that the user
can use switch in IP multicast.
36.3.2 IGMP Snooping Configuration Task List
1. Enable IGMP Snooping
2. Configure IGMP Snooping
1. Enable IGMP Snooping
Command
Explanation
Global Mode
ip igmp snooping
no ip igmp snooping
Enables IGMP Snooping. The no operation
disables IGMP Snooping function.
2. Configure IGMP Snooping
Command
Explanation
Global Mode
ip igmp snooping vlan <vlan-id>
no ip igmp snooping vlan <vlan-id>
Enables IGMP Snooping for specified VLAN.
The no operation disables IGMP Snooping for
specified VLAN.
ip igmp snooping proxy
no ip igmp snooping proxy
Enable IGMP Snooping proxy function, the no
command disables the function.
ip igmp snooping vlan < vlan-id > limit
{group <g_limit> | source <s_limit>}
no ip igmp snooping vlan < vlan-id > limit
Configure the max group count of vlan and the
max source count of every group. The “no ip
igmp snooping vlan <vlan-id> limit” command
cancels this configuration.
ip igmp snooping vlan <vlan-id> l2-
general-querier
no ip igmp snooping vlan <vlan-id> l2-
general-querier
Set this vlan to layer 2 general querier. It is
recommended to configure a layer 2 general
querier on a segment. The “no ip igmp
snooping vlan <vlan-id> l2-general-
querier”command cancels this configuration.
ip igmp snooping vlan <vlan-id> l2-
general-querier-version <version>
Configure the version number of a general
query from a layer 2 general querier.