PLANET XGS3-24040 - Manual (Page 393)

Chapter 43 Ipv4 Multicast Protocol
43-47
IGMP Snooping is also referred to as IGMP listening. The switch prevents multicast traffic from 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.
43.10.2 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 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.
ip igmp snooping vlan <vlan-id>
l2-general-querier-source <source>
Configure the source address of a general
query from a layer 2 general querier.