H3C Technologies H3C S7500E Series Switches - Manual (Page 249)

18-3
through the device and ports on the device only transmit voice traffic, as shown in Figure 18-2 . In
this mode, ports assigned to a voice VLAN transmit voice traffic exclusively, which prevents the
impact of data traffic on the transmission of voice traffic.
Figure 18-2 Only IP phones access the network
Both modes forward tagged packets according to their tags.
The following tables list the required configurations on ports of different link types in order for these
ports to support tagged or untagged voice traffic sent from IP phones when different voice VLAN
assignment modes are configured.
IP phones send tagged voice traffic
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
tagged voice
traffic
Configuration requirements
Automatic
Access
Manual
No —
Automatic
Configure the default VLAN of the port, which
cannot be the voice VLAN, and assign the port to
its default VLAN.
Trunk
Manual
Yes
Make all the configurations required for the
automatic mode; in addition, assign the port to
the voice VLAN.
Automatic
Configure the default VLAN of the port, which
cannot be the voice VLAN, and configure the port
to permit packets of its default VLAN to pass
through untagged.
Hybrid
Manual
Yes
Make all the configurations required for the
automatic mode; in addition, configure the port to
permit packets of the voice VLAN to pass
through tagged.