4. Enable MLD snooping in VLAN 3 on all the S7700s.
5. Enable the MLD snooping module of SwitchA to respond to changes of the Layer 2 network
topology.
Data Preparation
To complete the configuration, you need the following data:
l Source IP address contained in the MLD General Query message that the MLD snooping
module sends to respond to changes of the Layer 2 network: FE80::1
Procedure
Step 1 Enable MSTP on all the S7700s. The configuration procedure is not provided here. For the
method of configuring MSTP, see the Quidway S7700 Smart Routing Switch Configuration
Guide - Ethernet.
Step 2 Create VLAN 3 and add interfaces to VLAN 3 on all the S7700s. The configuration procedure
is not provided here.
Step 3 Run the mld-snooping enable command to enable MLD snooping globally on all the S7700s.
Step 4 Enable MLD snooping in VLAN 3 on all the S7700s.
[SwitchA] vlan 3
[SwitchA-vlan3] mld-snooping enable
[SwitchA-vlan3] quit
The configurations of other S7700s are similar to the configuration of SwitchA, and are not
provided here.
Step 5 Enable the MLD snooping module of SwitchA to respond to changes of the Layer 2 network
topology.
[SwitchA]mld-snooping send-query enable
[SwitchA] mld-snooping send-query source-address FE80::1
Step 6 Verify the configuration.
l Verify that Host 1 and Host 2 can receive multicast data.
l Run the display stp command on the S7700s to find the interfaces that are blocked and the
transmission path of multicast data.
l Assume that GE 1/0/1 is blocked and multicast data is transmitted to Host 1 through the path
SwitchA -> SwitchC -> SwitchB and to Host 2 through the path SwitchA -> SwitchD. Run
the shutdown command on GE 1/0/1 of SwitchC to shut down the interface so that the
topology of the MSTP network changes.
l Verify that Host 1 and Host 2 can still receive multicast data after the network topology
changes.
----End
Configuration Files
Configuration file of SwitchA
#
sysname SwitchA
#
mld-snooping enable
mld-snooping send-query enable
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 11 MLD Snooping Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
412
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