HP 6125G Command Reference Manual page 189

Default level
2: System level
Parameters
None
Description
Use voice vlan security enable to enable the voice VLAN security mode.
Use undo voice vlan security enable to disable the voice VLAN security mode.
By default, the voice VLAN security mode is enabled.
When you enable the security mode for a voice VLAN, only voice traffic can be transmitted in the voice
VLAN.
The device matches the source MAC addresses of the packets against the supported OUI addresses to
determine whether they are voice traffic and filters all non-voice traffic, guaranteeing high priority and
high quality for voice traffic.
When a voice VLAN operates in common mode, other data traffic is also transmitted in the voice VLAN.
Examples
# Disable voice VLAN security mode.
<Sysname> system-view
[Sysname] undo voice vlan security enable
181