Optional) Enabling The Discarding Of Unknown Multicast Data Packets In A Vlan - Huawei Quidway s3700 series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast
hosts belonging to the same multicast group, the Layer 3 device receives duplicated IGMP Report
or Leave messages from these hosts.
After IGMP Report and Leave message suppression is enable, the Layer 2 device sends only the
IGMP Report or Leave message received first for a multicast group to the Layer 3 device in one
query interval and does not send Report or Leave messages received subsequently for this
multicast group, reducing the number of packets transmitted over the network.
During the suppression time, the S3700 sends only one copy of the same IGMP messages
continuously sent by hosts upstream. This reduces the number of redundant messages.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
vlan vlan-id
The VLAN view is displayed.
Step 3 Run:
igmp-snooping report-suppress
IGMP Report and Leave message suppression is enabled.
After IGMP Report and Leave message suppression is enabled, the S3700 sends a Report or
Leave message upstream only when the first host joins a multicast group or the last member
leaves a multicast group.
Step 4 (Optional) Run:
igmp-snooping suppress-time suppress-time
The suppression time of IGMP messages is set in the VLAN.
By default, the suppression time of IGMP messages is 10 seconds. You are recommended to set
the suppression time of IGMP Report or Leave messages the same as the maximum response
time of IGMP Query messages.
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2.3.9 (Optional) Enabling the Discarding of Unknown Multicast
Data Packets in a VLAN
Context
Unknown multicast data packets are broadcast in a VLAN by default. If multicast services are
stable, for example, the static Layer 2 multicast service, unknown multicast data packets do not
need to be processed. You can enable the discarding of multicast data packets in such a case. If
multicast services are unstable, for example, users frequently join or leave multicast groups,
unknown multicast data packets need to be processed; otherwise some users cannot receive
multicast data.
Issue 01 (2011-10-26) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2 IGMP Snooping Configuration
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