Igmp Filtering (Controlling Multicast Distribution); Example - Allied Telesis AR400 Series How To Configure

IGMP filtering (controlling multicast distribution)

IGMP filtering lets you control the distribution of multicast services on each switch port.
Filtering is useful for subscription services when clients must be explicitly authorised to view
a multicast stream.
IGMP Filtering is available in Software Version 2.7.5 or later.

Example

This example uses the same network configuration as
convenience, the diagram is reproduced below.
The network contains a Windows 2000 workstation that regularly sends SVRLOC messages
(an IGMP Membership Report for 224.0.1.22). This group gets added to the list of groups in
vlan100 on switch 1, as shown in the following output of the show ip igmp command.
Manager Switch 1> show ip igmp
IGMP Protocol
------------------------------------------------------------------------
Status ........................... Enabled
Default Query Interval ........... 125 secs
Default Timeout Interval ......... 260 secs
...
Interface Name .......... vlan100
Group List ..............
------------------------------------------------------------------------
We do not need to receive this multicast, so we will filter it out.
Page 35 | AlliedWare™ OS How To Note: IGMP
Multicast Server
Rapier 24i
Switch 2:
Snooper
port 2
Client 1
Group. 224.0.1.22
Ports 1
IGMP filtering (controlling multicast distribution) > Example
port 1
AT-8948
port 50
(blocked by STP)
port 26
port 25
Last Adv. 172.31.0.99
"IGMP snooping" on page
Switch 1:
Querier
port 49
port 26
Rapier 24i
port 25
port 3
Client 2
(DR)
Refresh time 251 secs
9. For
Switch 3:
Snooper
igmp-snooper.eps