Cisco Catalyst 2960 Series, Configuration Manual

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DETAILED STEPS
Purpose Command or Action
Enters the global configuration mode. configure terminal
Example:
Switch# configure terminal
Step 1
Enables CDP globally. By default, CDP is enabled. cdp run
Example:
Switch(config)# cdp run
Step 2
Specifies the port connected to the Cisco IP Phone, and enters
interface configuration mode. interface interface-id
Example:
Switch(config)# interface
Step 3
Valid interfaces include physical ports.
gigabitethernet 2/1/1
Enables CDP on the port. By default, CDP is enabled. cdp enable
Example:
Switch(config-if)# cdp enable
Step 4
Configures the switch port to trust the CoS value in traffic
received from the Cisco IP Phone. Use one of the following: Step 5
• mls qos trust cos
or
• mls qos trust dscp
Configures the routed port to trust the DSCP value in traffic
received from the Cisco IP Phone.
Example:
Switch(config-if)# mls qos trust cos
By default, the port is not trusted.
Specifies that the Cisco IP Phone is a trusted device.
mls qos trust device cisco-phone
Step 6
Example:
Switch(config-if)# mls qos trust
You cannot enable both trusted boundary and auto-QoS ( auto
qos voip interface configuration command) at the same time;
they are mutually exclusive.
device cisco-phone
To disable the trusted boundary feature, use the no mls
qos trust device interface configuration command.
Note
Returns to privileged EXEC mode. end
Example:
Switch(config-if)# end
Step 7
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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How to Configure QoS