SSM Mapping
For MLDv1 hosts, you can configure SSM mapping to build a multicast network of the SSM
model.
Limiting the Number of MLD Group Memberships
l Limiting the total number of MLD group memberships on a switch: The total number of
MLD group memberships created by a switch cannot exceed the limit value. When the total
number of MLD group memberships created by a switch exceeds the limit value, no MLD
entry can be created.
l Limiting the total number of MLD group memberships in a single instance: The total
number of MLD group memberships related to an instance cannot exceed the limit value.
When the total number of MLD group memberships related to an instance reaches the limit
value, no MLD entry can be created.
l Limiting the total number of MLD group memberships on an interface: The total number
of MLD group memberships created on an interface cannot exceed the limit value. When
the total number of MLD group memberships created on an interface reaches the limit
value, no MLD entry can be created.
10.3 Configuring Basic MLD Functions
By configuring basic MLD functions on an interface of a multicast device connected with the
user network segment, you can enable a user host to access the multicast network and receive
multicast data packets.
10.3.1 Establishing the Configuration Task
Before configuring basic MLD functions, familiarize yourself with the applicable environment,
pre-configuration tasks, and required data. This can help you complete the configuration task
quickly and accurately.
Applicable Environment
MLD is applicable to the switch and the hosts directly connected to the switch. The switch and
hosts need to run MLD. This section only describes how to configure MLD on a switch.
You must enable IPv6 multicast routing before configuring MLD. IPv6 multicast routing is the
prerequisite for configuring IPv6 multicast functions. If the IPv6 multicast routing is disabled,
all IPv6 multicast configurations are deleted.
Enable MLD on the interface connected to hosts. For different MLD versions, MLD packets are
different; therefore, you need to configure matching MLD versions for switchs and hosts. Other
MLD configurations can be done only after the preceding operations are complete.
To enable hosts in the network segment to which the interface is connected to join the specified
groups and receive packets to the groups, you can set a group policy on the related interface to
limit the range of groups that the interface serves.
Pre-configuration Tasks
Before configuring basic MLD functions, configure a unicast routing protocol to interconnect
the entire multicast domain.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 10 MLD Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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