3Com 4500G Family Configuration Manual page 168

Device A uses voice VLAN 2 to transmit voice packets for IP phone A and voice VLAN 3 to transmit
voice packets for IP phone B.
Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to work in automatic voice VLAN
assignment mode. In addition, if one of them has not received any voice packet in 30 minutes, the port
is removed from the corresponding voice VLAN automatically.
Figure 3-3 Network diagram for automatic voice VLAN assignment mode configuration
VLAN 2
IP phone A
010-1001
MAC: 0011-1100-0001
Mask: ffff-ff00-0000
PC A
MAC: 0022-1100-0002
Configuration procedure
# Create VLAN 2 and VLAN 3.
<DeviceA> system-view
[DeviceA] vlan 2 to 3
# Set the voice VLAN aging time to 30 minutes.
[DeviceA] voice vlan aging 30
# Since GigabitEthernet 1/0/1 may receive both voice traffic and data traffic at the same time, to ensure
the quality of voice packets and effective bandwidth use, configure voice VLANs to work in security
mode, that is, configure the voice VLANs to transmit only voice packets. (Optional. By default, voice
VLANs work in security mode.)
[DeviceA] voice vlan security enable
# Configure the allowed OUI addresses as MAC addresses prefixed by 0011-1100-0000 or
0011-2200-0000. In this way, Device A identifies packets whose MAC addresses match any of the
configured OUI addresses as voice packets.
[DeviceA] voice vlan mac-address 0011-1100-0001 mask ffff-ff00-0000 description IP phone A
[DeviceA] voice vlan mac-address 0011-2200-0001 mask ffff-ff00-0000 description IP phone B
# Configure GigabitEthernet 1/0/1 to operate in automatic voice VLAN assignment mode. (Optional. By
default, a port operates in automatic voice VLAN assignment mode.)
[DeviceA] interface gigabitethernet 1/0/1
[DeviceA-GigabitEthernet1/0/1] voice vlan mode auto
# Configure GigabitEthernet 1/0/1 as a hybrid port.
[DeviceA-GigabitEthernet1/0/1] port link-type hybrid
# Configure VLAN 2 as the voice VLAN for GigabitEthernet 1/0/1.
[DeviceA-GigabitEthernet1/0/1] voice vlan 2 enable
Device A
GE1/0/1
GE1/0/2
IP phone B
010-1002
MAC: 0011-2200-0001
Mask: ffff-ff00-0000
PC B
MAC: 0022-2200-0002
3-8
Device B
Internet
GE1/0/1
VLAN 3
0755-2002