C
HAPTER
38
| Multicast Filtering Commands
IGMP Filtering and Throttling
– 1222 –
COMMAND USAGE
When the maximum number of groups is reached on a port, the switch can
take one of two actions; either “deny” or “replace.” If the action is set to
deny, any new IGMP join reports will be dropped. If the action is set to
replace, the switch randomly removes an existing group and replaces it
with the new multicast group.
EXAMPLE
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp max-groups action replace
Console(config-if)#
ip igmp query-drop This command drops any received IGMP query packets. Use the no form to
restore the default setting.
SYNTAX
[no] ip igmp query-drop [vlan vlan-id]
vlan-id - A VLAN identification number. (Range: 1-4094)
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration (Ethernet)
COMMAND USAGE
This command can be used to drop any query packets received on the
specified interface. If this switch is acting as a Querier, this prevents it from
being affected by messages received from another Querier.
EXAMPLE
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp query-drop vlan 2
Console(config-if)#
ip
multicast-data-drop
This command drops all multicast data packets. Use the no form to disable
this feature.
SYNTAX
[no] ip multicast-data-drop
DEFAULT SETTING
Disabled
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