H3C LS-3100-52P-OVS-H3 Operation Manual - page 1126
1-17
z
Make sure that the other querier present interval is greater than the MLD query interval; otherwise
the MLD querier may frequently change.
z
Make sure that the MLD query interval is greater than the maximum response delay for MLD
general queries; otherwise, multicast group members may be wrongly removed.
Configuring MLD Fast Leave Processing
In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to
a port of the MLD querier. To allow fast response to the MLD done messages of the host when it
switches frequently from one IPv6 multicast group to another, you can enable MLD fast leave
processing on the MLD querier.
With fast leave processing enabled, after receiving an MLD done message from a host, the MLD querier
sends a leave notification to the upstream immediately without first sending MLD
multicast-address-specific queries. In this way, the leave latency is reduced on one hand, and the
network bandwidth is saved on the other hand.
Follow these steps to configure MLD fast leave processing globally:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter MLD view
mld
—
Configure MLD fast leave
processing
fast-leave [ group-policy
acl6-number ]
Required
Disabled by default.
Configuring MLD SSM Mapping
Due to some possible restrictions, some receiver hosts on an SSM network may run MLDv1. To provide
SSM service support for these receiver hosts, you need to configure the MLD SSM mapping feature on
the last hop router.
Configuration Prerequisites
Before configuring the MLD SSM mapping feature, complete the following tasks:
z
Configure any IPv6 unicast routing protocol so that all devices in the domain can be interoperable
at the network layer.
z
Configure MLD basic functions