Configuring Basic Igmp Snooping Functions; Enabling Igmp Snooping; Specifying The Version Of Igmp Snooping - HP 6125G Configuration Manual

effective only on the current port. For a given port, a configuration that you make in IGMP snooping
view is effective only if you do not make the same configuration in Layer 2 Ethernet interface view
or Layer 2 aggregate interface view.
• For IGMP snooping, the configurations that you make on a Layer 2 aggregate interface do not
interfere with those you make on its member ports, nor do they participate in aggregation
calculations. Configurations that you make on a member port of an aggregate group do not take
effect until it leaves the aggregate group.

Configuring basic IGMP snooping functions

Before you configure basic IGMP snooping functions, complete the following tasks:
• Configure the corresponding VLANs.
Determine the version of IGMP snooping.
•

Enabling IGMP snooping

When you enable IGMP snooping, follow these guidelines:
You must enable IGMP snooping globally before you enable it in a VLAN.
•
• After you enable IGMP snooping in a VLAN, do not enable IGMP or PIM on the corresponding
VLAN interface.
When you enable IGMP snooping in a specified VLAN, IGMP snooping works only on the ports in
•
this VLAN.
To enable IGMP snooping:
Step
1. Enter system view.
2. Enable IGMP snooping globally
and enter IGMP-snooping view.
3. Return to system view.
4. Enter VLAN view.
5. Enable IGMP snooping in the
VLAN.

Specifying the version of IGMP snooping

Different versions of IGMP snooping can process different versions of IGMP messages:
• IGMPv2 snooping can process IGMPv1 and IGMPv2 messages, but cannot process IGMPv3
messages, which will be flooded in the VLAN.
IGMPv3 snooping can process IGMPv1, IGMPv2 and IGMPv3 messages.
•
If you change IGMPv3 snooping to IGMPv2 snooping, the system:
Clears all IGMP snooping forwarding entries that are dynamically added.
•
Keeps static IGMPv3 snooping forwarding entries (*, G).
•
Clears static IGMPv3 snooping forwarding entries (S, G), which will be restored when IGMP
•
snooping is switched back to IGMPv3 snooping.
Command
system-view
igmp-snooping
quit
vlan vlan-id
igmp-snooping enable
18
Remarks
N/A
Disabled by default
N/A
N/A
Disabled by default