The mld-snooping proxy router-protocol-pass command configures an MLD snooping proxy-enabled device to transparently transmit MLD Report messages.
The undo mld-snooping proxy router-protocol-pass command restores the default configuration.
By default, an MLD snooping proxy-enabled device does not transparently transmit MLD Report messages.
Usage Scenario
If MLD snooping proxy is enabled on a Layer 2 device and its upstream device, the devices will learn the same multicast forwarding entries and constantly exchange MLD Query and Report messages, causing multicast entries not to age. Such multicast protocol and data message forwarding is meaninglessly. To address this issue, run the mld-snooping proxy router-protocol-pass command to enable the Layer 2 device to transparently transmit MLD Report messages from a router interface to other router interfaces.
Running the mld-snooping proxy router-protocol-pass command is recommended on a network where an MLD snooping proxy-enabled device is dual-homed to upstream devices.Prerequisites
MLD snooping proxy has been enabled for the VLAN/VSI using the mld-snooping proxy command.
Configuration Impact
After the mld-snooping proxy router-protocol-pass command is run, the processing action for MLD Report messages changes on router interfaces of the MLD snooping proxy-enabled device. The device does not terminate the protocol messages received from router interfaces but forwards them to upstream devices.
<HUAWEI> system-view [~HUAWEI] mpls [*HUAWEI-mpls] quit [*HUAWEI] mpls l2vpn [*HUAWEI-l2vpn] quit [*HUAWEI] vsi a [*HUAWEI-vsi-a] pwsignal ldp [*HUAWEI-vsi-a-ldp] vsi-id 1 [*HUAWEI-vsi-a-ldp] quit [*HUAWEI-vsi-a] undo mld-snooping proxy router-protocol-pass
<HUAWEI> system-view [~HUAWEI] mld-snooping enable [*HUAWEI] vlan 10 [*HUAWEI-vlan10] mld-snooping proxy router-protocol-pass