Allied Telesis AR400 manual Statically specifying that a port is a router port, Example

Statically specifying that a port is a router port > Example

Statically specifying that a port is a router port

Since software versions 281-04 and 291-04, you can statically configure particular ports as multicast router ports. This feature is useful in some unusual network configurations in which the learning process cannot identify all router ports. You could also use it creatively in special circumstances, when a Querier is unnecessary.

To specify router ports, use the command:

add igmpsnooping vlan={vlan-name1..4094} routerport={port-listall}

This command causes the switch to immediately forward all IGMP and multicast data packets to the designated router port.

Note that this is an IGMP snooping command, designed to give administrators greater control of layer 2 multicasting. It does not provide static multicast routing.

Example

The following sequence explores the effect of adding a static router port on a Rapier 48i switch.

1.Enable IGMP debugging so you can see some of the mechanics behind the commands.

Manager Rapier 48i> enable ip igmp debug

Info (1005003): Operation successful.

2.Check the current IGMP snooping entries.

Note that there is one All Groups entry for port 50.

Manager Rapier 48i> show igmpsnooping

IGMP Snooping

------------------------------------------------------------------------

Status	...........................	Enabled
Disabled All-groups ports		........ None
Vlan Name (vlan id) ..... default (1)
Fast Leave		Off
Query Solicitation		On
Static Router Ports ..... None
Group List
Group. 239.255.255.250		Entry timeout 190 secs
Ports	7
All Groups		Entry timeout 255 secs
Ports	50

------------------------------------------------------------------------

Page 101 AlliedWare™ OS How To Note: IGMP