Multicast Listener Discovery (MLD) Snooping per VLAN


MLD snooping provides support per individual VLANs. In addition to current global enable and disable support, you can do the following using the mld-snooping-modify command:


  • Specify a range of VLANs on which MLDv1 and MLDv2 messages are used. These two VLAN ranges are mutually exclusive. When a MLDv1 query is received on a VLAN configuredforMDv2, the MLDv2 query is moved to a VLAN configured with MLDv1 if there is only one multi-cast router for this VLAN. If a MLDv2 message is later received for the same VLAN, existing entries are removed and the supported version is changed to MLDv2.


  • Specify VLAN ranges for snooping link-local addresses and ND Solicited Node addresses. You must include these VLANs in one MLDv1 and MLDv2 VLAN list.

 

Use these command options for the mld-snooping-modify command:


CLI (network-admin@Spine1) > mld-snooping-modify

 

mld-snooping-modify

Enables or disables Multicast Listener Discovery (MLD) snooping

 One or more of the following options:

 

scope local|fabric

Specify the MLDsnooping scope - fabric or local

enable|disable

Enable or disable MLD snooping

mldv1-vlans vlan-list

Specify the VLANs to enable snooping and use MLDv1 protocol. Default: none

mldv2-vlans vlan-list

Specify the VLANs on which to enable snooping and use MLDv2 protocol. Default 1 - 4092

snoop-linklocal-vlans vlan-list

Allow snooping of link-local groups(ff02::/16) on these vlans. Default 1 - 4092

snoop-nd-vlans vlan-list

Allow snooping of ND SN Multicast addresses (ff02::1:ff/104) on these vlans. Default 1 - 4092

 

These command options replace these Netvisor One versions earlier than 2.5.2 command options:


The mld-snooping-modify show format all command displays the following sample output:

 

CLI (network-admin@Spine1) > mld-snooping-show format all

 

switch:

Name of Switch

enable:

no

mldv1-vlans:

none

mldv2-vlans:

1 - 4092

snoop-linklocal-vlans:

1 - 4092

snoop-nd-vlans:

1 - 4092

nvOS-managed-vlans:

none

interop-v1-vlans:

none

vlans:

1 - 4092