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16-3
Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 16 Configuring Voice VLAN
Configuring Voice VLAN
Voice VLAN Configuration Guidelines
These are the voice VLAN configuration guidelines:
• You should configure voice VLAN on switch access ports.
• The Port Fast feature is automatically enabled when voice VLAN is configured. When you disable
voice VLAN, the Port Fast feature is not automatically disabled.
• If you enable port security on a voice VLAN port and if there is a PC connected to the IP phone, you
should set the maximum allowed secure addresses on the port to more than 1.
• You cannot configure static secure MAC addresses in the voice VLAN.
• Voice VLAN ports can also be these port types:
–
Dynamic access port. See the “Configuring Dynamic Access Ports on VMPS Clients” section
on page 14-29 for more information.
–
Secure port. See the “Configuring Port Security” section on page 18-4 for more information.
–
802.1X authenticated port. See the “Enabling 802.1X Authentication” section on page 8-8 for
more information.
–
Protected port. See the “Configuring Protected Ports” section on page 18-3 for more
information.
Configuring a Port to Connect to a Cisco 7960 IP Phone
Because a Cisco 7960 IP Phone also supports a connection to a PC or other device, a port connecting the
switch to a Cisco 7960 IP Phone can carry mixed traffic.
You can configure the port to carry voice traffic in one of these ways:
• Configuring Ports to Carry Voice Traffic in 802.1Q Frames, page 16-4
• Configuring Ports to Carry Voice Traffic in 802.1P Priority Tagged Frames, page 16-4
You can configure the IP phone to carry data traffic in one of these ways:
• Overriding the CoS Priority of Incoming Data Frames, page 16-5
• Configuring the IP Phone to Trust the CoS Priority of Incoming Data Frames, page 16-6