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Configure MLD snooping Router Port

MLD snooping router port is the port receiving MLD group query packets or multicast routing protocol packets. When the device receives the MLD member report or leave packet, forward the packet via MLD snooping router port. In this way, the upper-connected router can maintain the MLD member relation table correctly.

MLD snooping router port can be dynamically learned or configured manually. MLD snooping dynamic router port refreshes the age time by regularly receiving the MLD group query packets or multicast routing protocol packets. MLD snooping static router port will not be aged.

Configuration Condition

Before configuring the MLD snooping router port functions, first complete the following tasks:

  • Enable global and VLAN MLD snooping function
  • Add port member in VLAN

Configure MLD snooping Static Router Port

After configuring MLD snooping static router port, the device can forward the MLD protocol packet via the port even the port does not receive the MLD group query packet or multicast routing protocol packet. It can prevent the problem that the router port ages because the services of the upper-connected L3 multicast device are interrupted.

Table 10-11 Configure MLD snooping static router port

Step

Command

Description

Enter global configuration mode

configure terminal

-

Configure MLD snooping static router port

ipv6 mld snooping vlan vlan-id mrouter { interface interface-name | link-aggregation link-aggregation-id }

Mandatory

By default, do not configure the MLD snooping static router port.

Configure Age Time of MLD snooping Dynamic Router Port

If the configured age time of the MLD snooping dynamic router port is longer, it can prevent the problem that the router port of the upper-connected L3 multicast device is aged fast because of the service interruption.

Table 10-12 Configure age time of MLD snooping dynamic router port

Step

Command

Description

Enter global configuration mode

configure terminal

-

Configure age time of MLD snooping dynamic router port

ipv6 mld snooping vlan vlan-id timer router-port expiry expiry-value

Optional

By default, the age time of MLD snooping dynamic router port is 255s.