Inconsistent Memberships On Routers On The Same Subnet - HP A6600 Configuration Manual

• If the MLD version on the router interface is lower than that on the host, the router will not be able to
recognize the MLD report from the host.
If mld group-policy has been configured on an interface, the interface cannot receive report
•
messages that fail to pass filtering.
Solution
Check that the networking, interface connections, and IP address configuration are correct. Check
1.
the interface information with display mld interface. If no information is output, the interface is in an
abnormal state. This is usually because you have configured shutdown on the interface, the interface
is not properly connected, or the IPv6 address configuration is not correctly done.
Check that the IPv6 multicast routing is enabled. Carry out display current-configuration to check
2.
whether multicast ipv6 routing-enable has been executed. If not, carry out multicast ipv6
routing-enable in system view to enable IPv6 multicast routing. In addition, enable MLD on the
corresponding interface.
Check the MLD version on the interface. You can use display mld interface to check whether the MLD
3.
version on the interface is lower than that on the host.
Check that no ACL rule has been configured to restrict the host from joining IPv6 multicast group G.
4.
Carry out display current-configuration interface to check whether mld group-policy has been
executed. If an IPv6 ACL is configured to restrict the host from joining IPv6 multicast group G, the
ACL must be modified to allow IPv6 multicast group G to receive report messages.

Inconsistent memberships on routers on the same subnet

Symptom
Different memberships are maintained on different MLD routers on the same subnet.
Analysis
A router running MLD maintains multiple parameters for each interface, and these parameters
•
influence one another, forming very complicated relationships. Inconsistent MLD interface parameter
configurations for routers on the same subnet will surely result in inconsistent MLD memberships.
• Two MLD versions are available. Although routers running different MLD versions are compatible
with hosts, all routers on the same subnet must run the same MLD version. Inconsistent MLD versions
running on routers on the same subnet will also lead to inconsistent MLD memberships.
Solution
Check MLD configurations. Carry out display current-configuration to display the MLD configuration
1.
information on the interface.
Carry out display mld interface on all routers on the same subnet to check the MLD timers for
2.
consistent configurations.
Use display mld interface to check that the routers are running the same MLD version.
3.
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