Configuring Basic Functions Of Igmp Snooping - 3Com Switch 4800G 24-Port Configuration Manual

Configuring Basic
Functions of IGMP
Snooping
Configuration
Prerequisites
Enabling IGMP Snooping
Configuring the Version
of IGMP Snooping
Before configuring the basic functions of IGMP Snooping, complete the following
task:
Configure the corresponding VLANs.
■
Before configuring the basic functions of IGMP Snooping, prepare the following
data:
Version of IGMP Snooping.
■
Follow these steps to enable IGMP Snooping:
To do...
Enter system view
Enable IGMP Snooping
globally and enter
IGMP-Snooping view
Return to system view
Enter VLAN view
Enable IGMP Snooping in the
VLAN
n
IGMP Snooping must be enabled globally before it can be enabled in a VLAN.
■
After enabling IGMP Snooping in a VLAN, you cannot enable IGMP and/or PIM
■
on the corresponding VLAN interface, and vice versa.
When you enable IGMP Snooping in a specified VLAN, this function takes
■
effect for Ethernet ports in this VLAN only.
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
c
CAUTION: 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

Configuring Basic Functions of IGMP Snooping

Use the command...
system-view
igmp-snooping
quit
vlan vlan-id
igmp-snooping enable
Use the command...
system-view
vlan vlan-id
igmp-snooping version
version-number
559
Remarks
-
Required
Disabled by default
-
-
Required
Disabled by default
Remarks
-
-
Optional
Version 2 by default