interface GigabitEthernet2/0/0
port hybrid pvid vlan 21
port hybrid untagged vlan 21
#
interface GigabitEthernet3/0/0
port hybrid pvid vlan 30
port hybrid untagged vlan 30
#
pim
ssm-policy 2000
#
acl number 2000
rule 5 permit source 232.1.1.0 0.0.0.255
#
igmp
ssm-mapping 232.1.1.0 255.255.255.0 133.133.1.1
ssm-mapping 232.1.1.0 255.255.255.0 133.133.3.1
#
return
4.8.3 Example for Configuring IGMP Limit
Networking Requirements
When many users are watching multiple video programs, they occupy high bandwidth. As a
result, the device performance degrades and the multicast data received by users is unstable.
The traditional multicast technologies control the multicast networks by limiting the number of
multicast forwarding entries or the number of outgoing interfaces in a multicast forwarding entry.
These technologies, however, cannot flexibly manage the real-time video services or available
resources on the IPTV network.
The IGMP limit function allows users to plan network resources properly and limit the number
of multicast groups that users can join. As shown in Figure 4-3, the IGMP limit for the entire
system, an instance, and an interface needs to be configured on SwitchA, SwitchB, and
SwitchC connected to user hosts to limit the number of multicast groups that users can join.
When the number of users in a multicast group reaches the upper limit, no IGMP entry can be
created for the multicast group. This ensures that the multicast data received by the users in the
multicast group is stable.
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.
99
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