Igmp Throttling (Limiting The Number Of Streams For Each Subscriber); Example - Allied Telesis AR400 Series How To Configure

IGMP throttling (limiting the number of streams
for each subscriber)
IGMP throttling allows you to limit the number of streams that subscribers may access at a
given time, for example, to protect from bandwidth oversubscription. When the number of
multicast group memberships associated with a switch port reaches the configured limit, the
port can either deny further Membership Reports, or replace an existing membership with
the new group.
IGMP filtering and throttling can be applied separately or together. The switch applies the
filters first, then subjects any multicast group memberships passed by the filter to the limits
imposed by throttling.
IGMP Throttling is available in Software Version 2.7.5 or later.

Example

This example builds on
uses the same network configuration as
diagram is reproduced below.
Page 40 | AlliedWare™ OS How To Note: IGMP
IGMP throttling (limiting the number of streams for each subscriber) > Example
"IGMP filtering (controlling multicast distribution)" on page 35
Multicast Server
port 26
Rapier 24i
Switch 2:
Snooper
port 2
Client 1
"IGMP snooping" on page
port 1
AT-8948
Switch 1:
Querier
port 50 port 49
(blocked by STP)
port 25
9. For convenience, the
port 26
Rapier 24i
Switch 3:
port 25
Snooper
port 3
Client 2
igmp-snooper.eps
and