Configuring The Version Of Igmp Snooping; Configuring Igmp Snooping Port Functions; Configuration Prerequisites - 3Com 4210G Series Configuration Manual

IGMP Snooping must be enabled globally before it can be enabled in a VLAN.
When you enable IGMP Snooping in a specified VLAN, this function takes effect for the ports in
this VLAN only.

Configuring the Version of IGMP Snooping

By configuring an IGMP Snooping version, you actually configure the version of IGMP messages that
IGMP Snooping can process.
IGMP Snooping version 2 can process IGMPv1 and IGMPv2 messages, but not IGMPv3
messages, which will be flooded in the VLAN.
IGMP Snooping version 3 can process IGMPv1, IGMPv2 and IGMPv3 messages.
Follow these steps to configure the version of IGMP Snooping:
To do...
Enter system view
Enter VLAN view
Configure the version of IGMP
Snooping
If you switch IGMP Snooping from version 3 to version 2, the system will clear all IGMP Snooping
forwarding entries from dynamic joins, and will:
Keep forwarding entries for version 3 static (*, G) joins;
Clear forwarding entries from version 3 static (S, G) joins, which will be restored when IGMP
Snooping is switched back to version 3.
For details about static joins, Refer to

Configuring IGMP Snooping Port Functions

Configuration Prerequisites

Before configuring IGMP Snooping port functions, complete the following tasks:
Enable IGMP Snooping in the VLAN
Configure the corresponding port groups.
Before configuring IGMP Snooping port functions, prepare the following data:
Aging time of dynamic router ports,
Aging time of dynamic member ports, and
Multicast group and multicast source addresses
Use the command...
system-view
vlan vlan-id
igmp-snooping version
version-number
Configuring Static Ports.
2-7
Remarks
—
—
Optional
Version 2 by default