3Com Switch 7750 Configuration Guide Guide

104 CHAPTER 11: VOICE VLAN CONFIGURATION
■ Voice VLAN function can be effective only for the static VLAN. Once a dynamic
VLAN is enabled with voice VLAN function, it automatically changes to static
VLAN.
■ When a voice VLAN operates in the security mode, the devices in it only permit
packets whose source addresses are the voice OUI addresses that can be
identified. Packets whose source addresses cannot be identified, including
certain authentication packets (such as 802.1x authentication packets), will be
dropped. So, do not transmit both voice data and service data in a voice VLAN.
If you have to do so, make sure the voice VLAN do not operate in the security
mode.
■ After the voice VLAN function is enabled on a port, you cannot enable the
QinQ feature on the port, and vice versa, that is, after the QinQ feature is
enabled on a port, you cannot enable the voice VLAN function on the port.
■ A voice VLAN-enabled port will automatically learn OUI addresses, without
being limited by the function of prohibiting MAC address learning and the
specified maximum number of MAC addresses to be learnt.
Voice VLAN
Configuration
Displaying
After the above configurations, you can execute the display command in any
view to view the running status and verify the configuration effect.
Voice VLAN
Configuration
Example
Voice VLAN
Configuration Example
(Automatic Mode)
Network requirements
■ Create VLAN 2 and configure it as a voice VLAN.
■ Configure Ethernet1/0/1 port as a Trunk port, with VLAN 6 as the default port.
■ Ethernet1/0/1 port can be added to/removed from the voice VLAN
automatically according to the type of the data stream that reaches the port.
Configuration procedure
# Create VLAN 2.
<SW7750> system-view
[SW7750] vlan 2
# Configure Ethernet1/0/1 port to be a Trunk port, with VLAN 6 as the default
VLAN, and permit packets of VLAN 6 to pass through the port.
Tabl e 53 Display configurations of a Voice VLAN
Operation Command Description
Display the voice VLAN
configuration status
display voice vlan status
You can execute the display
command in any view.
Display the currently valid OUI
addresses
display voice vlan oui
Display the ports operating in
the current voice VLAN
display vlan vlan-id