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Configuring IGMP Snooping Only 141
<Switch A> display igmp-snooping group
Total 1 IP Group(s).
Total 1 MAC Group(s).
Vlan(id):100.
Total 1 IP Group(s).
Total 1 MAC Group(s).
Router port(s):
IP group(s):the following ip group(s) match to one mac group.
IP group address:224.1.1.1
Host port(s):Ethernet1/0/1
MAC group(s):
MAC group address:0100-5e7f-fffe
Host port(s):Ethernet1/0/1
As shown above, a multicast group entry for the multicast group 224.1.1.1 has
been created on Switch A, with Ethernet 1/0/1 as the member port. Acting as the
IGMP Snooping querier, Switch A does not have a router port.
3 View the information on Switch C
# View the IGMP packet statistics on Switch C.
<SwitchC> display igmp-snooping statistics
Received IGMP general query packet(s) number:10.
Received IGMP specific query packet(s) number:0.
Received IGMP V1 report packet(s) number:0.
Received IGMP V2 report packet(s) number:0.
Received IGMP leave packet(s) number:.0
Received error IGMP packet(s) number:0.
Sent IGMP specific query packet(s) number:0.
Switch C received only IGMP general queries from the querier.
# View the multicast group information on Switch C.
<Switch C> display igmp-snooping group
Total 0 IP Group(s).
Total 0 MAC Group(s).
Vlan(id):100.
Total 0 IP Group(s).
Total 0 MAC Group(s).
Router port(s):Ethernet1/0/1
As shown above, no multicast entries have been created on Switch C. The switch
must flood multicast data in the VLAN to allow the multicast data to flow to the
receivers downstream. Therefore, do not enable the function of dropping
unknown multicast packets on Switch C.
Complete Configuration Configuration on Switch A
#
unknown-multicast drop enable
#
igmp-snooping enable
#