Igmp Fast Leave; Example - Allied Telesis AR400 Series How To Configure

IGMP fast leave

IGMP Fast Leave enhances your control over router or switch bandwidth. Enabling Fast Leave
tells IGMP snooping to stop the transmission of a group multicast stream to a port as soon as
it receives a Leave message on that port. No timeouts are observed.
Ordinarily, when IGMP snooping sees a Leave message, it waits for a Membership Query
message before setting the entry timeout to 2 seconds. Fast Leave tells IGMP to drop the
entry from the port as soon as the Leave message is seen. For this reason, Fast Leave should
only be configured on interfaces that have one clien t per port.
Availability IGMP Fast Leave is available in Software Version 2.7.5 or later. In Software Versions
earlier than 281-03 and 2.9.1, configure it by using the command:
In Software Versions 281-03 and 2.9.1, the syntax changed to make it consistent with
Query
now:
Software Version 291-08 introduced multiple mode for Fast Leave. See
mode for fast leave" on page

Example

This example uses the same network configuration as
convenience, the diagram is reproduced below.
Page 61 | AlliedWare™ OS How To Note: IGMP
set igmpsnooping fastleave={on|off} interface=vlanx
Solicitation. Therefore, the above syntax is still valid but the recommended syntax is
set igmpsnooping vlan=vlanx fastleave={on|off}
67.
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
IGMP fast leave > Example
"Multiple host
port 26
Rapier 24i
Switch 3:
port 25
Snooper
port 3
Client 2
igmp-snooper.eps
9. For