The mld-snooping router-aging-time command sets the aging time of dynamic router interfaces.
The undo mld-snooping router-aging-time command restores the default value.
By default, the aging time of dynamic router interfaces is 180s or equals the Holdtime value contained in a Protocol Independent Multicast (PIM) Hello message.
Usage Scenario
Network congestion may delay the transmission of a Query message from an MLD Querier. If a dynamic router interface does not receive any MLD Query message with source IP addresses other than 0::0 or PIM hello message within the aging time, it becomes a non-router interface. The device will then not send Report or Done messages to the interface. This may lead to multicast data transmission interruption. Therefore, if a network is unstable, run the mld-snooping router-aging-time command to set larger aging time for dynamic router interfaces. The device resets the aging time of a dynamic router interface when the interface receives an MLD Query or PIM Hello message from the interface.
Configuration Impact
If the remaining aging time of a dynamic router interface is less than router-aging-time, the device sets the aging time of the dynamic router port to router-aging-time, irrespective of whether the device receives a PIM Hello messages or MLD Query message from the interface.
Precautions
The mld-snooping router-aging-time command fails to be run in a VLAN or VSI view in any of the following conditions:
<HUAWEI> system-view [~HUAWEI] mld-snooping enable [*HUAWEI] mpls [*HUAWEI-mpls] quit [*HUAWEI] mpls l2vpn [*HUAWEI-l2vpn] quit [*HUAWEI] vsi vsi1 [*HUAWEI-vsi-vsi1] mld-snooping router-aging-time 500
<HUAWEI> system-view [~HUAWEI] mld-snooping enable [*HUAWEI] vlan 10 [*HUAWEI-vlan100] mld-snooping router-aging-time 500