Cisco Ip Phone Voice Traffic; Cisco Ip Phone Data Traffic - Cisco Catalyst 2960 series Configuration Manual

Configuring Voice VLANs
Figure 7: Cisco 7960 IP Phone Connected to aSwitch

Cisco IP Phone Voice Traffic

You can configure an access port with an attached Cisco IP Phone to use one VLAN for voice traffic and
another VLAN for data traffic from a device attached to the phone. You can configure access ports on the
switch to send Cisco Discovery Protocol (CDP) packets that instruct an attached phone to send voice traffic
to the switch in any of these ways:
• In the voice VLAN tagged with a Layer 2 CoS priority value
• In the access VLAN tagged with a Layer 2 CoS priority value
• In the access VLAN, untagged (no Layer 2 CoS priority value)
Note In all configurations, the voice traffic carries a Layer 3 IP precedence value (the default is 5 for voice
traffic and 3 for voice control traffic).
Related Topics
Configuring Cisco IP Phone Voice Traffic
Example: Configuring Cisco IP Phone Voice Traffic, on page 103

Cisco IP Phone Data Traffic

The switch can also process tagged data traffic (traffic in IEEE 802.1Q or IEEE 802.1p frame types) from the
device attached to the access port on the Cisco IP Phone. You can configure Layer 2 access ports on the switch
to send CDP packets that instruct the attached phone to configure the phone access port in one of these modes:
• In trusted mode, all traffic received through the access port on the Cisco IP Phone passes through the
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phone unchanged.
Catalyst 2960-X Switch VLAN Configuration Guide, Cisco IOS Release 15.0(2)EX
Cisco IP Phone Voice Traffic
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