Nortel Networks 2300 Disabling or Reenabling Igmp Snooping, Set igmp enable disable vlan vlan-id

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Configuring and Managing IGMP Snooping

Disabling or Reenabling IGMP Snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335 Disabling or Reenabling Proxy Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335 Enabling the Pseudo-Querier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 Changing IGMP Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 Enabling Router Solicitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341 Configuring Static Multicast Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 Displaying Multicast Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Internet Group Management Protocol (IGMP) snooping controls multicast traffic on an WSS switch by forwarding packets for a multicast group only on the ports that are connected to members of the group. A multicast group is a set of IP hosts that receive traffic addressed to a specific Class D IP address, the group address.

The WSS switch listens for multicast packets and maintains a table of multicast groups, as well as their sources and receivers, based on the traffic. IGMP snooping is enabled by default.

You can configure IGMP snooping parameters and enable or disable the feature on an individual VLAN basis.

The current software version supports IGMP versions 1 and 2.

Disabling or Reenabling IGMP Snooping

IGMP snooping is enabled by default. To disable or reenable the feature, use the following command:

set igmp {enable disable} [vlan vlan-id]

If you do not specify a VLAN ID, the change is applied to all VLANs on the WSS switch.

Disabling or Reenabling Proxy Reporting

Proxy reporting reduces multicast overhead by sending only one report for each active group to the multicast routers, instead of sending a separate report from each multicast receiver. For example, if the WSS switch receives reports from three receivers for multicast group 237.255.255.255, the switch sends only one report for the group to the routers. One report is sufficient to cause the routers to continue sending data for the group. Proxy reporting is enabled by default.

Nortel WLAN Security Switch 2300 Series Configuration Guide