Manual

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Москва, Новозаводская ул., 18, стр. 1
253
Multicast Configuration
Suppose two programs are provided in the Multicast Server using multicast address Group1
and Group2, three of four hosts running multicast applications are connected to port 2, 6, 10
plays program1, while the host is connected to port 12 plays program 2.
IGMP Snooping listening result:
The multicast table built by IGMP Snooping in VLAN 100 indicates ports 1, 2, 6, 10 in Group1
and ports 1, 12 in Group2.
All the four hosts can receive the program of their choice: ports 2, 6, 10 will not receive the
traffic of program 2 and port 12 will not receive the traffic of program 1.
Scenario 2: L2-general-querier
The switches as IGMP Queries
The configuration of Switch2 is the same as the switch in scenario 1, SwitchA takes the place
of Multicast Router in scenario 1. Let’s assume VLAN 60 is configured in SwitchA, including
ports 1, 2, 6, 10 and 12. Port 1 connects to the multicast server, and port 2 connects to
Switch2. In order to send Query at regular interval, IGMP query must enabled in Global mode
and in VLAN60.
The configuration steps are listed below:
SwitchA#config
SwitchA(config)#ip igmp snooping
SwitchA(config)#ip igmp snooping vlan 60
SwitchA(config)#ip igmp snooping vlan 60 L2-general-querier
SwitchB#config
Multica
st
Server
Group
1
Group
2
Group
1
Group
1
Group
1
Group
2
Switch A
IGMP Snooping
L2 general
querier
Switch B
IGMP
Snooping
Multicast port