Figure 2-1 Networking diagram of multicast CAC
IP/MPLS
Core
BTV
UPE
DSLAM
NPE
CE
Switch
NOTE
You can choose to configure multicast CAC for a VLAN, a Layer 2 interface, or an interface in a VLAN,
or you can configure multicast CAC for all of them.
2.6.1 Establishing the Configuration Task
Applicable Environment
The UPE can work in either of the following scenarios to provide multicast services based on
VLANs:
l Static multicast groups are configured on the NPE and the UPE is configured as the querier.
In this scenario, the UPE does not process Query messages from the NPE. Instead, the UPE
only learns the Report messages sent from the user side to generate corresponding multicast
forwarding entries.
The UPE sends General Query messages periodically. If the UPE does not receive Report
messages from the user side, the corresponding entries on the UPE ages. When receiving
Leave messages, the UPE sends Group-Specific Query messages. You can also configure
static multicast groups on the UPE.
l IGMP snooping is enabled on the UPE. When receiving Query messages from the NPE,
the UPE forwards the Query messages to all members on the VLAN. After receiving Report
messages from the user side, the UPE creates corresponding multicast forwarding entries.
If the later received Query message is from the same group and the corresponding multicast
forwarding entry does not reach the aging time, the UPE directly sends a Report message
to the NPE.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 2 IGMP Snooping Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
32
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