Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510 Chapter 6 IGMP Configuration
Huawei Technologies Proprietary
6-5
Figure 6-2 is an IGMP Proxy diagram for a leaf network.
Configure Switch B as follows:
z Enable multicast routing on VLAN interface 1 and VLAN interface 2, and then
configure the PIM protocol on it. And configure the IGMP protocol on
VLAN-interface 1 at the same time.
z On VLAN interface 2, configure VLAN interface 1 as the outbound IGMP Proxy
interface to external networks. You must enable the IGMP protocol on the interface
first, and then configure the igmp proxy command.
Configure Switch A as follows:
z Enable multicast routing and configure the IGMP protocol on VLAN interface 1.
z Configure the pim neighbor-policy command to filter PIM neighbors in the
network segment 33.33.33.0/24. That is, Switch A does not consider Switch B as
its PIM neighbor.
In this case, when Switch B of leaf network receives from VLAN interface 2 an IGMP
join or IGMP leave message sent by the host, it will change the source address of the
IGMP information to the address of VLAN interface 1: 33.33.33.2 and send the
information to VLAN interface 1 of Switch A. For Switch A, this works as if there is a
host directly connected to VLAN interface 1.
Similarly, when Switch B receives the IGMP general group or group-specific query
message from the Layer 3 Switch A, it will also change the source address of the query
message to the IP address of VLAN interface 2: 22.22.22.1 and send the message from
VLAN interface 2.
In
Figure 6-2, VLAN interface 2 of Switch B is called the client and VLAN interface 1 of
Switch B is called the proxy.
6.2 IGMP Configuration
You cannot perform other IGMP configuration tasks until you enable the IGMP protocol
after multicast is enabled.
IGMP configuration tasks include:
Table 6-1 Configuration task overview
Operation Description Related section
Configure IGMP version
Optional
Section
6.2.1 Configuring IGMP
Version
Configure IGMP query
packets
Optional
Section 6.2.2 Configuring IGMP
Query Packets
Configure IGMP multicast
groups on the interface
Optional
Section 6.2.3 Configuring IGMP
Multicast Groups on the Interface
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