3Com Switch 4800G 24-Port - Displaying and Maintaining Voice VLAN; Voice VLAN Configuration Examples

Displaying and Maintaining Voice VLAN 103
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■ Only one VLAN of a device can have the voice VLAN function enabled at a
time, and the VLAN must be an existing static VLAN.
■ A port that is in a link aggregation port group cannot have the voice VLAN
feature enabled.
■ If a port is enabled with voice VLAN and works in the manual voice VLAN
mode, you need to add the port to the voice VLAN manually to make the voice
VLAN takes effect on the port.
Displaying and
Maintaining Voice
VLAN
Voice VLAN
Configuration
Examples
Automatic Voice VLAN
Mode Configuration
Example
Network requirement
■ Create VLAN 2 and configure it as a voice VLAN with an aging time of 100
minutes.
■ The voice traffic sent by the IP phones is tagged. Configure GigabitEthernet
1/0/1 as a Hybrid port and as the access port, with VLAN 6 as the default VLAN.
■ The device allows voice packets from GigabitEthernet 1/0/1 with an OUI
address of 0011-2200-0000 and a mask of ffff-ff00-0000 to be forwarded
through the voice VLAN.
Configure the working mode
as manual
undo voice vlan mode auto Required
Disabled by default
Add the ports
in manual
mode to the
voice VLAN
Access port Refer to “Configuring an
Access-Port-Based VLAN” on
page 88.
Use one of the three
approaches.
After you add an Access port
to the voice VLAN, the voice
VLAN becomes the default
VLAN of the port
automatically.
Trunk port Refer to “Configuring a
Trunk-Port-Based VLAN” on
page 89.
Hybrid port Refer to “Configuring a
Hybrid-Port-Based VLAN” on
page 90.
Configure the
voice VLAN as
the default
VLAN of the
port
Trunk port Refer to section “Configuring
a Trunk-Port-Based VLAN” on
page 89
Optional
This operation is required if
the inbound voice traffic is
untagged. If the inbound
voice traffic is tagged, do not
configure the voice VLAN as
the default VLAN of the port.
Hybrid port Refer to “Configuring a
Hybrid-Port-Based VLAN” on
page 90.
Enable the voice VLAN feature
on the port
voice vlan enable Required
To do… Use the command… Remarks
To do… Use the command… Remarks
Display the voice VLAN state display voice vlan state Available in any view
Display the OUI addresses currently
supported by system
display voice vlan oui Available in any view