Configuration Guide Configuring IGMP Snooping
A# configure terminal
A(config)# ip multicast-routing
A(config)# interface GigabitEthernet 0/1
A(config-if-GigabitEthernet 0/1)# ip pim sparse-mode
A(config-if-GigabitEthernet 0/1)# exit
A(config)# interface vlan 1
A(config-if-VLAN 1)# ip pim sparse-mode
A(config-if-VLAN 1)# exit
B# configure terminal
B(config)# ip igmp snooping ivgl
Send packets from the source (10.1.1.1) to G (229.1.1.1) to add Receiver 1 to G.
 Confirm that the packets (10.1.1.1 and 229.1.1.1) are received by Receiver 1.
 Display the IGMP snooping forwarding entry on B and ensure that the port (10.1.1.1, 229.1.1.1, 1)
includes only Fa0/2.
 Check whether the IGMP snooping working mode is IVGL.
B# show ip igmp snooping gda-table
Multicast Switching Cache Table
D: DYNAMIC
S: STATIC
M: MROUTE
(*,224.1.1.1, 1):
VLAN(1) 2 OPORTS:
FastEthernet 0/1(M)
FastEthernet 0/2(D)
B# show ip igmp snooping
IGMP Snooping running mode: IVGL
IGMP Snooping L2-entry-limit: 65536
Source port check: Disable
Source ip check: Disable
IGMP Fast-Leave: Disable
IGMP Report suppress: Disable
IGMP Global Querier: Disable
IGMP Preview: Disable
IGMP Tunnel: Disable
IGMP Preview group aging time : 60(Seconds)
Dynamic Mroute Aging Time : 300(Seconds)
Dynamic Host Aging Time : 260(Seconds)
vlan 1