H3C S5500-SI Series Operation Manual page 14

Operation Manual – VLAN
H3C S5500-SI Series Ethernet Switches
In automatic mode, the system identifies the source MAC address contained in the
untagged packet sent when the IP phone is powered on and matches it against the
OUI addresses. If a match is found, the system will automatically add the port into
the Voice VLAN and send ACL rules to ensure the packet precedence. An aging
time can be configured on the device. The system will remove a port from the
voice VLAN if no voice packets are received from it within the aging time. The
adding and deleting of ports are automatically realized by the system.
In manual mode, the administrator adds the IP phone access port directly to the
voice VLAN. The system then identifies the source MAC address contained in the
packets on the port, matches it against the OUI addresses, and decides whether
to forward the packets in the voice VLAN. When the administrator adds a port to
the voice VLAN, the device automatically applies ACL rules to the port to configure
packet priority. In this mode, the adding or deleting of ports is realized by the
administrators.
In any of the two modes, the port forwards tagged packets in the same manner: forward
the tagged packets based on the VLAN IDs contained in them.
The above two working modes are configured in Ethernet port view. The voice VLAN
working modes of different ports are independent and different ports can be configured
to work in different modes.
The following table lists the co-relation between voice VLAN modes, voice traffic types
of IP phones, and port types.
Table 2-2 Port modes and voice stream types
Port voice VLAN
mode
Automatic mode
Voice
Port type
stream type
Access
Trunk
Tagged voice
stream
Hybrid
Access
Untagged
Trunk
voice stream
Hybrid
2-2
Chapter 2 Voice VLAN Configuration
Supported or not
Not supported
Supported
Make sure the default
VLAN of the port exists
and is not a voice VLAN.
And the port permits the
packets of the default
VLAN.
Supported
Make sure the default
VLAN of the port exists
and is in the list of the
tagged VLANs
packets are permitted by
the port.
Not supported.
whose