607
Usage Guide:
This command can only be configured on L2 general querier. The
Suppression-query-time refers to the period of suppression state in which the querier
enters when receives query from the layer 3 IGMP in the segments.
Example:
Switch(config)#ip igmp snooping vlan 2 suppression-query-time 270
15.4 IGMP Snooping Example
Scenario 1. IGMP Snooping function
Fig 14-1 Enabling IGMP Snooping function
Example: As shown in the above figure, a VLAN 100 is configured in the switch and
includes ports 1, 2, 6, 10 and 12 on slot 1. Four hosts are connected to port 2, 6, 10, 12
respectively and the multicast router is connected to port 1. As IGMP Snooping is
disabled by default either in the switch or in the VLANs, If IGMP Snooping should be
enabled in VLAN 100, the IGMP Snooping should be first enabled for the switch in Global
Mode and in VLAN 100 and set port 1 of VLAN 100 to be the M-Router port.
The configuration steps are listed below:
Switch#config
Switch(C
onfig)#ip igmp snooping
Switch(C
onfig)#ip igmp snooping vlan 100
Switch(C
onfig)#ip igmp snooping vlan 100 mrouter interface ethernet 1/1
Multicast Configuration
Suppose two programs are provided in the Multicast Server using multicast address
Multica
Mrouter Port
IGMP Snooping
Group 1
Group 1
Group 1 Group 2
Switch
