No. Data
1 Whether the Router-Alert option is set in the packet
10.4.2 Configuring the Router-Alert Option of an MLD Packet
To make the multicast device connected with the user network segment or other MLD interfaces
on the same network segment receive only the MLD messages with Router-Alert options, you
can configure a Router-Alert option for MLD messages on the multicast device connected with
the user network segment.
Context
Do as follows on the switch connected to hosts:
This configuration is optional. By default, MLD packets sent by switchs carry the Router-Alert
option, but the switchs do not check the Router-Alert option. That is, the switchs process all the
received MLD packets, including those without the Router-Alert option.
NOTE
The configuration involves the following cases:
l Global configuration: It is valid on all interfaces.
l Configuration on an interface: The configuration on an interface takes precedence over the global
configuration. If the configuration on an interface is not done, the global configuration is used.
Procedure
l Global Configuration
1. Run:
system-view
The system view is displayed.
2. Run:
mld
The MLD view is displayed.
3. Run:
require-router-alert
The Router-Alert option is required in the received MLD packet.
If the received the MLD packet does not carry the Router-Alert option, the packet is
discarded.
4. Run:
send-router-alert
The Router-Alert option is set in the header of the MLD packet to be sent.
l Configuration on an Interface
1. Run:
system-view
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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