40
Eth1/0/3 (S)
Eth1/0/5 (S)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 2 port.
Eth1/0/3
Eth1/0/5
The output shows that Ethernet 1/0/3 and Ethernet 1/0/5 on Switch C have become static member
ports for multicast group 224.1.1.1.
IGMP snooping querier configuration example
Network requirements
As shown in
, in a Layer 2–only network environment, two multicast sources Source 1 and
Source 2 send multicast data to multicast groups 224.1.1.1 and 225.1.1.1 respectively, Host A and Host C
are receivers of multicast group 224.1.1.1, and Host B and Host D are receivers of multicast group
225.1.1.1.
All the receivers run IGMPv2, and all the switches run IGMPv2 snooping. Switch A, which is close to the
multicast sources, is chosen as the IGMP snooping querier.
To prevent flooding of unknown multicast traffic within the VLAN, be sure to configure all the switches to
drop unknown multicast data packets.
Because a switch does not enlist a port that has heard an IGMP query with a source IP address of 0.0.0.0
(default) as a dynamic router port, configure a non-all-zero IP address as the source IP address of IGMP
queries to ensure normal creation of Layer 2 multicast forwarding entries.
Figure 15
Network diagram
Configuration procedure
1.
Configure switch A:
# Enable IGMP snooping and the function of dropping unknown multicast traffic globally.
<SwitchA> system-view
