H3C Technologies H3C S7500E Series Switches - Manual (Page 250)

18-4
IP phones send untagged voice traffic
When IP phones send untagged voice traffic, you can only configure the voice traffic receiving ports on
the device to operate in manual voice VLAN assignment mode.
Required configurations on ports of different links types in order for the ports to support tagged voice
traffic
Port link type
Voice VLAN
assignment
mode
Support for
untagged voice
traffic
Configuration requirements
Automatic No —
Access
Manual Yes
Configure the default VLAN of the port as the
voice VLAN.
Automatic No —
Trunk
Manual Yes
Configure the default VLAN of the port as the
voice VLAN and assign the port to the voice
VLAN.
Automatic No —
Hybrid
Manual Yes
Configure the default VLAN of the port as the
voice VLAN and configure the port to permit
packets of the voice VLAN to pass through
untagged.
If an IP phone sends tagged voice traffic and its connecting port is configured with 802.1X
authentication and Guest VLAN, you should assign different VLAN IDs for the voice VLAN, the
default VLAN of the connecting port, and the 802.1X guest VLAN.
If an IP phone sends untagged voice traffic, to realize the voice VLAN feature, you must configure
the default VLAN of the connecting port as the voice VLAN. In this case 802.1X authentication
function cannot be realized.