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3.9.2 ip igmp snooping (Interface)
The ip igmp snooping interface configuration command enables Internet Group Management Protocol (IGMP) snooping
on a specific VLAN. To disable IGMP snooping on a VLAN interface, use the no form of this command.
Syntax
ip igmp snooping
no ip igmp snooping
Default Configuration
IGMP snooping is disabled on all VLANs in the set context.
Command Mode
Interface configuration (VLAN) mode
User Guidelines
IGMP snooping can only be enabled on static VLANs.
Example
The following example enables IGMP snooping on VLAN 2.
Console (config)# interface vlan 2
Console (config-if)# ip igmp snooping
3.9.3 ip igmp snooping mrouter
The ip igmp snooping mrouter interface configuration command enables automatic learning of multicast router ports in
the context of a specific VLAN. To remove automatic learning of multicast router ports, use the no form of this command.
Syntax
ip igmp snooping mrouter learn-pim-dvmrp
no ip igmp snooping mrouter learn-pim-dvmrp
Default Configuration
Automatic learning of mrouter ports is enabled.
Command Mode
Interface Configuration (VLAN) mode
User Guidelines
Multicast router ports can be configured statically by the bridge multicast forward-all command.
Example
The following example enables automatic learning of multicast router ports on VLANs.
Console (config) # interface vlan 2
Console (config-if)# ip igmp snooping mrouter learn-pim-dvmrp
3.9.4 ip igmp snooping host-time-out
The ip igmp snooping host-time-out interface configuration command configures the host-time-out. If an IGMP report for
a multicast group was not received for a host-time-out period, from a specific port, this port is deleted from the member list
of that multicast group. To reset to default host-time-out use the no form of this command.
Syntax
ip igmp snooping host-time-out time-out
no ip igmp snooping host-time-out
Default Configuration
The default host-time-out is 260 seconds.
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