ip igmp snooping leave-time-out
Dell™ PowerConnect™ 3324/3348 Switch CLI Guide
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Use the ip igmp snooping global configuration command to enable Internet Group Management Protocol (IGMP) snooping. To disable IGMP snooping, use the no form of this command.
ip igmp snooping
no ip igmp snooping
IGMP snooping is disabled.
Global Configuration Mode
None
The following example enables IGMP snooping.
Console (config)# ip igmp snooping |
Use the ip igmp snooping interface configuration command to enable 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.
ip igmp snooping
no ip igmp snooping
IGMP snooping is disabled on all VLANs in the set context.
Interface Configuration (VLAN) Mode
IGMP snooping can only be enabled on static VLANs.
The following example enables IGMP snooping on VLAN 2.
Console (config)# interface vlan 2 Console (config-if)# ip igmp snooping |
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.
ip igmp snooping mrouter learn-pim-dvmrp
no ip igmp snooping mrouter learn-pim-dvmrp
Automatic learning of mrouter ports is enabled.
Interface Configuration (VLAN) Mode
Auto-learning is performed by either IGMP queries or by listening to PIM (Protocol Independent Multicast) and DVMRP (Distance Vector Multicast Routing Protocol) transmissions, even though these protocols are not participated in/supported on this device (transmission is simply eavesdropped on). The senders are multicast routers, so that ports that have mrouters connected to them may be identified by simply listening.
Multicast router ports can be configured statically by using the bridge multicast forward-all command.
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 |
Use the ip igmp snooping host-time-out interface configuration command to configure 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.
ip igmp snooping host-time-out time-out
no ip igmp snooping host-time-out
The default host-time-out is 150 seconds.
Interface Configuration (VLAN) Mode
The timeout should be at least 3 times greater then the query period time of the IGMP device.
The following example configures the host timeout.
Console (config)# interface vlan 2 Console (config-if)# ip igmp snooping host-time-out 300 |
Use the ip igmp snooping mrouter-time-out interface configuration command to configure the mrouter-time-out. The mrouter-time-out is used for setting the aging-out time after multicast router ports are automatically learned. To configure the default mrouter-time-out, use the no form of this command.
ip igmp snooping mrouter-time-out time-out
no ip igmp snooping mrouter-time-out
The default value is 300 seconds.
Interface Configuration (VLAN) Mode
There are no user guidelines for this command.
The following example configures the mrouter timeout.
Console (config)# interface vlan 2 Console (config-if)# ip igmp snooping mrouter-time-out 300 |
Use the ip igmp snooping leave-time-out command to configure the leave-time-out. If an IGMP report for a multicast group is not received within the leave-time-out period after an IGMP leave message was received from a specific port, the current port is deleted from the member list of that multicast group. To configure the default leave-time-out, use the no form of this command.
ip igmp snooping leave-time-out {time-out | immediate-leave}
no ip igmp snooping leave-time-out
The default leave-time-out configuration is 10 seconds.
Interface Configuration (VLAN) Mode
The leave timeout should be set to greater than the maximum time that a host is allowed to respond to an IGMP Query.
Use immediate leave only where there is only one host connected to a port.
The following example configures the host leave-time-out.
Console (config)# interface vlan 2 Console (config-if)# ip igmp snooping leave-time-out 60 |
Use the show ip igmp snooping mrouter privileged EXEC command to display information on dynamically learned multicast router interfaces.
show ip igmp snooping mrouter [interface vlan-id]
This command has no default configuration.
Privileged EXEC Mode
There are no user guidelines for this command.
The following example displays IGMP snooping mrouter information on VLAN 1000.
Console # show ip igmp snooping mrouter interface 200 VLAN Ports ------- ----------------------------------------- 200 1/e1, 2/e1 |
Use the show ip igmp snooping interface privileged EXEC command to display IGMP snooping configuration.
show ip igmp snooping interface vlan-id
This command has no default configuration.
Privileged EXEC Mode
There are no user guidelines for this command.
The following example displays IGMP snooping information on VLAN 1000.
Use the show ip igmp snooping groups command to display the multicast groups learned by IGMP snooping.
show ip igmp snooping groups [vlan vlan-id] [address ip-multicast-address]
This command has no default configuration.
Privileged EXEC Mode
To see the full multicast address table (including static addresses) use the show bridge address-table command.
The following example displays IGMP snooping information on VLAN 1000.
Console # show ip igmp snooping groups Vlan IP Address Querier Ports ---- ------------------ ------- ------------------- 1 224-239.130|2.2.3 Yes 1/1, 2/2 19 224-239.130|2.2.8 Yes 1/9-11 |