Verifying The Configuration; Troubleshooting Mld; No Member Information Exists On The Receiver-Side Router - HP 6125XLG Ip Multicast Configuration Manual

Verifying the configuration

# Display MLD information on VLAN-interface 200 of Switch B.
[SwitchB] display mld interface vlan-interface 200
Vlan-interface200(FE80::200:5EFF:FE66:5100):
MLD is enabled.
MLD version: 1
Query interval for MLD: 125s
Other querier present time for MLD: 255s
Maximum query response time for MLD: 10s
Querier for MLD: FE80::200:5EFF:FE66:5100 (This router)
MLD groups reported in total: 1

Troubleshooting MLD

No member information exists on the receiver-side router

Symptom
When a host sends a message to announce that it is 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. MLD must be enabled on the interface
connecting to the host.
If the MLD version on the router interface is lower than that on the host, the router cannot recognize
•
the MLD report from the host.
If the mld group-policy command has been configured on an interface, the interface cannot receive
•
report messages that fail to pass filtering.
Solution
1. Use the display mld interface command to verify that the networking, interface connections, and IP
address configuration are correct. If the command does not produce output, the interface is in an
abnormal state. The reason might be one of the following:
The shutdown command has been configured on the interface.
The interface is not correctly connected.
The IPv6 addresses are not correctly configured.
2. Use the display current-configuration command to verify that the IPv6 multicast routing is enabled.
If it is not enabled, use the ipv6 multicast routing command in system view to enable IPv6 multicast
routing. In addition, verify that MLD is enabled on the associated interfaces.
3. Use the display mld interface command to verify that the MLD version on the interface is lower than
that on the host.
4. Use the display current-configuration interface command to verify that no ACL rule has been
configured to filter out the reports sent by the host to the IPv6 multicast group G.
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