Cisco Catalyst 2960 Series User Manual

How to Configure Voice VLAN
Configuring Cisco IP Phone Voice Traffic
You can configure a port connected to the Cisco IP Phone to send CDP packets to the phone to configure the
way in which the phone sends voice traffic. The phone can carry voice traffic in IEEE 802.1Q frames for a
specified voice VLAN with a Layer 2 CoS value. It can use IEEE 802.1p priority tagging to give voice traffic
a higher priority and forward all voice traffic through the native (access) VLAN. The Cisco IP Phone can also
send untagged voice traffic or use its own configuration to send voice traffic in the access VLAN. In all
configurations, the voice traffic carries a Layer 3 IP precedence value (the default is 5).
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
interface interface-id
4.
mls qos trust cos
5.
switchport voice {vlan{vlan-id | dot1p | none | untagged}}
6.
end
7.
Use one of the following:
•
show interfaces interface-id switchport
•
show running-config interface interface-id
8.
copy running-config startup-config
DETAILED STEPS
PurposeCommand or Action
Enables privileged EXEC mode. Enter your password if prompted.enable
Step 1
Example:
Switch> enable
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 2
Specifies the interface connected to the phone, and enters interface
configuration mode.
interface interface-id
Example:
Switch(config)# interface
Step 3
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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How to Configure Voice VLAN

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000