C
HAPTER
35
| VLAN Commands
Configuring Voice VLANs
– 1153 –
description - User-defined text that identifies the VoIP devices.
(Range: 1-32 characters)
DEFAULT SETTING
None
COMMAND MODE
Global Configuration
COMMAND USAGE
â—† 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.
â—† Selecting 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. Selecting FF-FF-FF-FF-FF-FF specifies a single MAC address.
EXAMPLE
The following example adds a MAC OUI to the OUI Telephony list.
Console(config)#voice vlan mac-address 00-12-34-56-78-90 mask ff-ff-ff-00-00-
00 description A new phone
Console(config)#
switchport
voice vlan
This command specifies the Voice VLAN mode for ports. Use the no form to
disable the Voice VLAN feature on the port.
SYNTAX
switchport voice vlan {manual | auto}
no switchport voice vlan
manual - The Voice VLAN feature is enabled on the port, but the
port must be manually added to the Voice VLAN.
auto - The port will be added as a tagged member to the Voice
VLAN when VoIP traffic is detected on the port.
DEFAULT SETTING
Disabled
COMMAND MODE
Interface Configuration
COMMAND USAGE
â—† When auto is selected, you must select the method to use for detecting
VoIP traffic, either OUI or 802.1ab (LLDP) using the switchport voice
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