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4
Multicast Filtering Commands
This switch uses IGMP (Internet Group Management Protocol) to query for any
attached hosts that want to receive a specific multicast service. It identifies the ports
containing hosts requesting a service and sends data out to those ports only. It then
propagates the service request up to any neighboring multicast switch/router to
ensure that it will continue to receive the multicast service.
Note that IGMP query can be enabled globally at Layer 2, or enabled for specific
VLAN interfaces at Layer 3. (Layer 2 query is disabled if Layer 3 query is enabled.)
IGMP Snooping Commands
ip igmp snooping
This command enables IGMP snooping on this switch. Use the no form to disable it.
Syntax
[no] ip igmp snooping
Default Setting
Enabled
Command Mode
Global Configuration
Example
Table 4-73 Multicast Filtering Commands
Command Groups Function Page
IGMP Snooping Configures multicast groups via IGMP snooping or static assignment,
sets the IGMP version, displays current snooping and query settings,
and displays the multicast service and group members
4-228
IGMP Query (Layer 2) Configures IGMP query parameters for multicast filtering at Layer 2 4-231
Static Multicast Routing Configures static multicast router ports 4-234
IGMP (Layer 3) Configures the IGMP protocol used with multicast routing 4-236
Table 4-74 IGMP Snooping Commands
Command Function Mode Page
ip igmp snooping Enables IGMP snooping GC 4-228
ip igmp snooping vlan static Adds an interface as a member of a multicast group GC 4-229
ip igmp snooping version Configures the IGMP version for snooping GC 4-229
show ip igmp snooping Shows the IGMP snooping and query configuration PE 4-230
show mac-address-table
multicast
Shows the IGMP snooping MAC multicast list PE 4-230