H3C Technologies H3C S5120 Series Switches - Manual (Page 331)

2-26
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
GE1/0/2 (D) ( 00:01:23 )
IP group(s):the following ip group(s) match to one mac group.
IP group address:224.1.1.1
(0.0.0.0, 224.1.1.1):
Attribute: Host Port
Host port(s):total 2 port.
GE1/0/3 (S)
GE1/0/5 (S)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 2 port.
GE1/0/3
GE1/0/5
As shown above, GigabitEthernet 1/0/3 and GigabitEthernet 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
z As shown in Figure 2-6 , 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, while Host B and Host D are receivers of
multicast group 225.1.1.1.
z All the receivers are running IGMPv2, and all the switches need to run IGMP snooping version 2.
Switch A, which is close to the multicast sources, is chosen as the IGMP-Snooping querier.
z To prevent flooding of unknown multicast traffic within the VLAN, it is required to configure all the
switches to drop unknown multicast data packets.
z 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.