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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.
38.3.2 IGMP Snooping Configuration Task List
1. Enable IGMP Snooping
2. Configure IGMP Snooping
1. Enable IGMP Snooping
Command
Global Mode
ip igmp snooping
no ip igmp snooping
2. Configure IGMP Snooping
Command
Global Mode
ip igmp snooping vlan <vlan-id>
no ip igmp snooping vlan <vlan-id>
ip igmp snooping proxy
no ip igmp snooping proxy
ip igmp snooping vlan < vlan-id > limit
{group <g_limit> | source <s_limit>}
no ip igmp snooping vlan < vlan-id > limit
ip igmp snooping vlan <1-4094> interface
(ethernet | port-channel|) IFNAME limit
{group <1-65535>| source <1-65535>}
strategy (replace | drop)
no ip igmp snooping vlan <1-4094>
interface (ethernet | port-channel|)
Explanation
Enables IGMP Snooping. The no operation
disables IGMP Snooping function.
Explanation
Enables IGMP Snooping for specified VLAN.
The no operation disables IGMP Snooping for
specified VLAN.
Enable IGMP Snooping proxy function, the no
command disables the function.
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.
Configure the number of groups which are
allowed joining and the maximum of the
source in each group under the IGMP
Snooping port. Configure the strategy when it
is up to the upper limit, including "replace" and
"drop". No command configures as "no
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Troubleshooting
