configure mld snooping timer

configure mld snooping timer router_timeout host_timeout {{vlan} vlan_name} {{vr} vr_name}

Description

Configures the MLD snooping timers.

Syntax Description


`router_timeout`	Specifies the time in seconds before removing a router snooping entry.
`host_timeout`	Specifies the time in seconds before removing a host‘s group snooping entry.
vlan_name	Applies the configuration only to the specified VLAN. If no VLAN is specified, the configuration applies to all VLANs.
vr_name	Specifies the VR to which the configuration should be applied. If no parameter is specified, the configuration is applied to the current VR contex.

Default

The router timeout default setting is 260 seconds. The host timeout setting is 260 seconds.

Usage Guidelines

Timers should be set to approximately 2.5 times the router query interval in use on the network. Specify the following:

router_timeout—The maximum time, in seconds, that a router snooping entry can stay without receiving a router report. The range is 10 to 214,748,364 seconds (6.8 years). The default setting is 260 seconds.
host_timeout—The maximum time, in seconds, that a group snooping entry can stay without receiving a group report. The range is 10 to 214,748,364 seconds (6.8 years). The default setting is 260 seconds.

MLD snooping is a Layer 2 function of the switch. It does not require multicast routing to be enabled. The feature reduces the flooding of IPv6 multicast traffic. On the VLAN, MLD snooping optimizes the usage of network bandwidth and prevents multicast traffic from being flooded to parts of the network that do not need it. The switch does not reduce any IP multicast traffic in the local multicast domain (FF02::x).

MLD snooping is enabled by default on the switch. MLD snooping expects at least one device on every VLAN to periodically generate MLD query messages. Without an MLD querier, the switch eventually stops forwarding IPv6 multicast packets to any port, because the MLD snooping entries times out, based on the value specified in host timeout.

Example

The following example configures the MLD snooping timers to 600 seconds for both timers:

configure mld snooping timer 600 600

History

This command was first available in ExtremeXOS 11.2.

Platform Availability

This command is available on the platforms listed for the IPv6 multicast routing feature in the Switch Engine v33.1.1 Licensing Guide document.