3com S7906E 설치 설명서

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2) Check that the IPv6 multicast routing is enabled. Carry out the display current-configuration

command to check whether the multicast ipv6 routing-enable command has been executed. If

not, carry out the multicast ipv6 routing-enable command in system view to enable IPv6

multicast routing. In addition, enable MLD on the corresponding interface.

3) Check the MLD version on the interface. You can use the display mld interface command to

check whether the MLD version on the interface is lower than that on the host.

4) Check that no ACL rule has been configured to restrict the host from joining IPv6 multicast group G.

Carry out the display current-configuration interface command to check whether the mld

group-policy command 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 currently 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

1) Check MLD configurations. Carry out the display current-configuration command to display the

MLD configuration information on the interface.

2) Carry out the display mld interface command on all routers on the same subnet to check the MLD

timers for consistent configurations.

3) Use

the

display mld interface command to check that the routers are running the same MLD

version.