R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

110
Enabling MLD snooping
When you enable MLD snooping, follow these guidelines:
• You must enable MLD snooping globally before you enable it for a VLAN.
• MLD snooping for a VLAN works only on the ports in that VLAN.
To enable MLD snooping:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable MLD snooping
globally and enter
MLD-snooping view.
mld-snooping
By default, MLD snooping is
disabled.
3. Return to system view.
quit N/A
4. Enter VLAN view.
vlan vlan-id N/A
5. Enable MLD snooping for the
VLAN.
mld-snooping enable
By default, MLD snooping for a
VLAN is disabled.
Specifying the MLD snooping version
Different versions of MLD snooping can process different versions of MLD messages:
• MLDv1 snooping can process MLDv1 messages, but it floods MLDv2 messages in the VLAN
instead of processing them.
• MLDv2 snooping can process MLDv1 and MLDv2 messages.
If you change MLDv2 snooping to MLDv1 snooping, the system does the following:
• Clears all MLD snooping forwarding entries that are dynamically created.
• Keeps static MLDv2 snooping forwarding entries (*, G).
• Clears static MLDv2 snooping forwarding entries (S, G), which will be restored when MLD
snooping is switched back to MLDv2 snooping.
For more information about static MLD snooping forwarding entries, see "Configuring static ports."
T
o specify the MLD snooping version:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter VLAN view.
vlan vlan-id N/A
3. Specify the version of MLD
snooping.
mld-snooping version
version-number
The default setting is MLDv1
snooping.