Multicast
H3C Low-End Ethernet Switches Configuration Examples
Chapter 2 Multicast Protocol Configuration
Examples
2-16
2.3 IGMP Snooping-Only Configuration Examples
2.3.1 Network Requirements
In case that it is unnecessary or infeasible to build a Layer-3 multicast network,
enabling IGMP Snooping on all the devices in a Layer 2 network can implement some
multicast functions.
2.3.2 Configuration Plan
1) As shown in
Figure 2-3
, in a Layer-2 network without Layer-3 devices, 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.
2)
Enable IGMP Snooping on Switch A, Switch B, and Switch C, with Switch A acting
as the IGMP Snooping querier.
3)
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.
2.3.3 Network Diagram
Figure 2-3
Network diagram for IGMP Snooping–only configuration
2.3.4 Configuration Procedure
I. Configuring switch A
# Enable IGMP Snooping globally.
<SwitchA> system-view
[SwitchA] igmp-snooping enable
Enable IGMP-Snooping ok.