CLI Reference Guide-R04

Chapter 22 | VLAN Commands
Configuring Voice VLANs
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Note that when the switchport voice vlan command is set to auto mode, the
remaining aging time displayed by the show voice vlan command will be
displayed. Otherwise, if the switchport voice vlan command is disabled or set to
manual mode, the remaining aging time will display “NA.”
Example
The following example configures the Voice VLAN aging time as 3000 minutes.
Console(config)#voice vlan aging 3000
Console(config)#
voice vlan
mac-address
This command specifies MAC address ranges to add to the OUI Telephony list. Use
the no form to remove an entry from the list.
Syntax
voice vlan mac-address mac-address mask mask-address
[description description]
no voice vlan mac-address mac-address mask mask-address
mac-address - Defines a MAC address OUI that identifies VoIP devices in the
network. (Format: xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx; for example,
01-23-45-00-00-00)
mask-address - Identifies a range of MAC addresses. (Format: xx-xx-xx-xx-xx-
xx or xxxxxxxxxxxx; Range: 80-00-00-00-00-00 to FF-FF-FF-FF-FF-FF)
description - User-defined text that identifies the VoIP devices. (Range: 1-30
characters)
Default Setting
None
Command Mode
Global Configuration
Command Usage
◆ VoIP devices attached to the switch can be identified by the manufacturer’s
Organizational Unique Identifier (OUI) in the source MAC address of received
packets. OUI numbers are assigned to manufacturers and form the first three
octets of device MAC addresses. The MAC OUI numbers for VoIP equipment can
be configured on the switch so that traffic from these devices is recognized as
VoIP.
◆ Setting a mask of FF-FF-FF-00-00-00 identifies all devices with the same OUI
(the first three octets). Other masks restrict the MAC address range. Setting a
mask of FF-FF-FF-FF-FF-FF specifies a single MAC address.