3com 4200G ユーザーズマニュアル

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C
HAPTER
 16: M
ULTICAST
 C
ONFIGURATION
 G
UIDE
Configuring IGMP 
Snooping Only
Network Diagram
Figure 37   Network diagram for IGMP Snooping only configuration
 
Networking and
Configuration
Requirements
Where it is unnecessary or infeasible to build a Layer 3 multicast network, enabling 
IGMP Snooping on all the devices in the Layer 2 network can implement some 
multicast functions.
As shown in Figure 37, in a Layer 2 only network, Switch C connects to the 
multicast source through Ethernet 1/0/3. At least one receiver is attached to 
Switch B and Switch C respectively.
Enable IGMP Snooping on Switch A, Switch B, and Switch C. Switch A acts as the 
IGMP Snooping querier.
Enable Switch A and Switch B to drop unknown multicast traffic so that multicast 
traffic for unknown multicast groups are not flooded in the VLAN.
Application Product
Matrix
Configuration Procedure
Configuring Switch A
# Enable IGMP Snooping globally.
<SwitchA> system-view
[SwitchA] igmp-snooping enable
Enable IGMP-Snooping ok. 
# Create VLAN 100, assign Ethernet 1/0/1 through Ethernet 1/0/2 to VLAN 100, 
and enable IGMP Snooping in this VLAN.
Source
1.1.1 .1/24
Host A
Receiver
Switch C
Switch A
Switch B
Host B
Receiver
Host C
Receiver
Querier
Eth1 /0/1
Eth1/0/2
Eth1/0/1
Eth1 /0/1
Eth1/0/2
Eth1/0/3
Eth1/0/2
Eth1/0 /3
Product series 
Software version 
Hardware version 
Switch 5500
Release V03.02.04 
All versions 
Switch 5500G
Release V03.02.04 
All versions 
Switch 4500
Release V03.03.00 
All versions
Switch 4210
 Release V03.01.00 
All versions