l Interval for sending the MLD Last Member Query messages. This timer helps the S7700
adapt to the change of load on the network.
l Duration for suppressing the Report messages. This timer saves network bandwidth and
reduces loads on the network.
Router Alert Option
The S7700 processes MLD messages differently based on whether the Router Alert option is
contained in MLD messages.
By default, the S7700 processes an MLD message regardless of whether the IP header of message
contains the Router Alert option. The S7700 sends the MLD messages that contain the Router
Alert option in the IP headers to the hosts in the VLAN.
You can determine whether MLD messages contain the Router Alert option.
Prompt Leave of Member Interfaces
When an interface of the S7700 receives an MLD Leave message of a multicast group, the
S7700 deletes the forwarding entry of the multicast group corresponding to the interface from
the forwarding table instead of sending Query messages. This process is called prompt leave.
When an interface is connected to only one host, you can enable the prompt leave function so
that the bandwidth can be released immediately after the host leaves the multicast group.
11.3 Enabling MLD Snooping
This section describes how to enable MLD snooping, add an interface to a multicast group
statically, and configure an interface as a static router interface.
11.3.1 Establishing the Configuration Task
Applicable Environment
By default, MLD snooping is disabled on the S7700. Therefore, you need to enable MLD
snooping on the S7700 globally.
After MLD snooping is enabled on the S7700 globally, MLD snooping remains disabled in a
VLAN by default. Therefore, you also need to enable MLD snooping in the VLAN.
If the hosts connected to an interface need to receive the multicast data of a certain group, you
can add the interface statically to the multicast group. The interface is called a static member
interface. The static member interface never ages.
On a network with stable topology, you can set the router interface on the S7700 as a static router
interface. The static router interface never ages, and can be deleted only through a certain
command.
Pre-configuration Tasks
Before enabling MLD snooping, complete the following tasks:
l Creating a VLAN
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 11 MLD Snooping Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
388
To Next Page
Loading...
