3Com Switch 7750 Series
Command Reference Guide – Extended VLAN Applications Chapter 1 Voice VLAN Configuration Commands
1-7
Use the undo voice vlan mac-address command to disable a MAC address from
being used to identify voice devices.
A switch can use up to 16 MAC addresses to identify voice devices, including the five
default OUI addresses (as listed in Table 1-2). When the number of MAC addresses
reaches 16, you will fail to add new MAC addresses.
Table 1-2 Default OUI addresses of a switch
Number OUI addresses Vendor
1 0003-6b00-0000 Cisco phone
2 000f-e200-0000 H3C Aolynk phone
3 00d0-1e00-0000 Pingtel phone
4 00e0-7500-0000 Polycom phone
5 00e0-bb00-0000 3com phone
Related command: display voice vlan oui.
Example
# Specify 00aa-bb00-0000 as an OUI address, with the description string being “ABC”.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] voice vlan mac-address 00aa-bb00-0000 mask ffff-ff00-0000 description
ABC
1.1.8 voice vlan mode Syntax
voice vlan mode auto
undo voice vlan mode auto
View
Ethernet port view
Parameter
None
Description
Use the voice vlan mode auto command to configure an Ethernet port to operate in
the automatic voice VLAN mode.