The host where the IGMP is run responds to the IGMP Query message of the S7700. If the host
gives no response and the operation times out, the S7700 considers that the multicast group does
not contain any member on the network segment and cancels data forwarding.
To enable hosts on the network segment of the interface to join the specified groups and receive
packets from the groups, you can set an ACL on the related interface to limit the range of groups
that the interface serves.
Pre-configuration Tasks
Before configuring basic IGMP functions, complete the following tasks:
l Configuring the parameters of the link layer protocol and the IP address of the interface to
enable the link-layer protocol
l Configuring the unicast routing protocol to ensure that IP routes between nodes are
reachable
Data Preparation
To configure basic IGMP functions, you need the following data.
No. Data
1 ID of the VLAN to which the interface
communicating with the host belongs
2 IGMP version
3 IP addresses of the multicast group and
multicast source
4 ACL rule for filtering multicast groups
4.3.2 Enabling IP Multicast
Context
The IP multicast function is the prerequisite of configuring other multicast protocols. Do as
follows on the S7700 connected to a host.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 (Optional) Run:
assign multicast-resource-mode optimize
The multicast forwarding table is optimized.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 4 IGMP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
71
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