Voice Vlan Assignment Modes - H3C S5120-EI Series Operation Manual

Voice VLAN Assignment Modes

A port can be assigned to a voice VLAN in one of the following two modes:
In automatic mode, the system matches the source MAC addresses in the untagged packets sent
when the IP phone is powered on against the OUI addresses. If a match is found, the system
automatically assigns the port to the voice VLAN, issues ACL rules and configures the packet
precedence. You can configure voice VLAN aging time on the device. The system will remove a
port from the voice VLAN if no packet is received from the port after the aging time expires.
Assigning/removing ports to/from a voice VLAN are automatically performed by the system.
In manual mode, you should assign an IP phone connecting port to a voice VLAN manually. Then,
the system matches the source MAC addresses in the packets against the OUI addresses. If a
match is found, the system issues ACL rules and configures the packet precedence. In this mode,
assigning/removing ports to/from a voice VLAN are performed manually.
Both modes forward tagged packets according to their tags.
The following table lists the co-relation between the port voice VLAN mode, the voice traffic type of an IP
phone, and the port link type.
Table 3-2 Co-relation
Voice VLAN
assignment mode
Automatic mode
Manual mode
Voice traffic type
Tagged voice traffic
Untagged voice traffic
Tagged voice traffic
Untagged voice
traffic
3-2
Port link type
Access: not supported
Trunk: supported if the default VLAN of the
connecting port exists and is not the voice VLAN and
the connecting port belongs to the default VLAN
Hybrid: supported if the default VLAN of the
connecting port exists and is not the voice VLAN and
the traffic of the default VLAN is permitted to pass
through the connecting port
Access, Trunk, hybrid: not supported
Access: not supported
Trunk: supported if the default VLAN of the
connecting port exists and is not the voice VLAN and
the connecting port belongs to the default VLAN
Hybrid: supported if the default VLAN of the
connecting port exists and is not the voice VLAN, the
traffice of the default VLAN is permitted to pass
through the port, and the traffic of the Voice VLAN is
permitted to pass through the connecting port tagged
Access: supported if the default VLAN of the
connecting port is the voice VLAN
Trunk: supported if the default VLAN of the
connecting port is the voice VLAN and that the voice
VLAN is permitted to pass through the connecting
port
Hybrid port: supported if the default VLAN of the
connecting port is the voice VLAN and is permitted to
pass through the connecting port untagged