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# Enable IPv6 multicast routing on Switch B, MLD proxying on VLAN-interface 100, and MLD on VLAN-
interface 200.
<SwitchB> system-view
[SwitchB] multicast ipv6 routing-enable
[SwitchB] interface vlan-interface 100
[SwitchB-Vlan-interface100] mld proxying enable
[SwitchB-Vlan-interface100] quit
[SwitchB] interface vlan-interface 200
[SwitchB-Vlan-interface200] mld enable
[SwitchB-Vlan-interface200] quit
3. Verify the installation
Use the display mld interface command to view the MLD configuration and operation information on an
interface. For example,
# Display MLD configuration and operation information on VLAN-interface 100 of Switch B.
[SwitchB] display mld interface vlan-interface 100 verbose
Vlan-interface100(2001::2):
MLD proxy is enabled
Current MLD version is 1
Multicast routing on this interface: enabled
Require-router-alert: disabled
Use the display mld group command to view MLD group information. For example,
# Display the MLD group information on Switch A.
[SwitchA] display mld group
Total 1 MLD Group(s).
Interface group report information
Vlan-interface100(2001::1):
Total 1 MLD Groups reported
Group Address Last Reporter Uptime Expires
ff3e::101 2001::2 00:02:04 00:01:15
The output shows that the MLD reports sent from the hosts are forwarded to Switch A through the proxy
interface, VLAN-interface 100 of Switch B.
Troubleshooting MLD
No member information on the receiver-side router
Symptom
When a host sends a message for joining IPv6 multicast group G, no member information of multicast
group G exists on the immediate router.
Analysis
• The correctness of networking and interface connections and whether the protocol layer of the
interface is up directly affect the generation of IPv6 group member information.
• IPv6 multicast routing must be enabled on the router and MLD must be enabled on the interface
connecting to the host.
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