Bridge Multicast Igmp Querymode - 3Com SuperStack II 9300 Command Reference Manual

3com switch command reference guide

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bridge multicast igmp

For CoreBuilder 9000: Applies to Layer 2 switching modules only.

Enables or disables the querying function of the Internet Group

Management Protocol (IGMP). From all IGMP-capable devices on a given

subnetwork, the one with the lowest IP address is elected as the querier.

Valid Minimum Abbreviation

b mu i querym

Important Considerations

The value that you select applies to the entire system.

If you enable igmp querymode, but disable igmp snoopmode, the

system or module cannot operate as an IGMP querier.

To prevent IP multicast traffic from occupying unnecessary bandwidth,

the best device to operate as the querier is the one closest to the

source of IP multicast traffic. You can disable querying on select

devices or manipulate IP addresses with the

queryIpAddress

IGMP querying must be disabled on a CoreBuilder 9400 switch if you

configure it as a MultiPoint Link Aggregation (MPLA) core switch. For

more information about MPLA, see the CoreBuilder 9400

Implementation Guide .

For the CoreBuilder 3500 system and CoreBuilder 9000 Layer 3

modules, IGMP commands exist under the ip multicast igmp

Whether the system can

operate as the IGMP querier if

command to force this configuration.

Possible Values

bridge multicast igmp

enabled (factory

default), or

current value