Overriding The Cos Priority Of Incoming Data Frames; Configuring The Ip Phone To Trust The Cos Priority Of Incoming Data Frames - Cisco Catalyst 2950 Software Configuration Manual

Chapter 15 Configuring Voice VLAN

Overriding the CoS Priority of Incoming Data Frames

You can connect a PC or other data device to a Cisco 7960 IP Phone port. The PC can generate packets
with an assigned CoS value. You can configure the switch to override the priority of frames arriving on
the IP phone port from connected devices.
Beginning in privileged EXEC mode, follow these steps to override the CoS priority received from the
nonvoice port on the Cisco 7960 IP Phone:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
switchport priority extend
cos value
Step 4
end
Step 5 show interfaces interface-id
switchport
Step 6 copy running-config startup-config (Optional) Save your entries in the configuration file.
Use the no switchport voice vlan interface configuration command or the switchport priority extend
none interface configuration command to return the port to its default setting.

Configuring the IP Phone to Trust the CoS Priority of Incoming Data Frames

You can connect a PC or other data device to a Cisco 7960 IP Phone port. The PC can generate packets
with an assigned CoS value. You can configure the switch to trust the priority of frames arriving on the
IP phone port from connected devices.
Beginning in privileged EXEC mode, follow these steps to trust the CoS priority received from the
nonvoice port on the Cisco 7960 IP Phone:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
switchport priority extend trust
Step 4
end
Step 5
show interfaces interface-id
switchport
Step 6 copy running-config startup-config (Optional) Save your entries in the configuration file.
78-11380-04
Purpose
Enter global configuration mode.
Enter interface configuration mode, and enter the switch port to be
configured.
Set the IP phone port to override the priority received from the PC or the
attached device.
The CoS value is a number from 0 to 7. Seven is the highest priority. The
default is 0.
Return to privileged EXEC mode.
Verify your entries.
Purpose
Enter global configuration mode.
Enter interface configuration mode, and enter the switch port to be
configured.
Set the IP phone port to trust the priority received from the PC or the attached
device.
Return to privileged EXEC mode.
Verify your entries.
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring Voice VLAN
15-5