Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Step 2
cdp run
Example:
Switch(config)# cdp run
Step 3 interface interface-id
Example:
Switch(config)# interface
gigabitethernet 2/1/1
Step 4 cdp enable
Example:
Switch(config-if)# cdp enable
Step 5
Use one of the following:
• mls qos trust cos
• mls qos trust dscp
Example:
Switch(config-if)# mls qos trust cos
Step 6
mls qos trust device cisco-phone
Example:
Switch(config-if)# mls qos trust
device cisco-phone
Step 7
end
Example:
Switch(config-if)# end

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

Purpose
Enters the global configuration mode.
Enables CDP globally. By default, CDP is enabled.
Specifies the port connected to the Cisco IP Phone, and enters
interface configuration mode.
Valid interfaces include physical ports.
Enables CDP on the port. By default, CDP is enabled.
Configures the switch port to trust the CoS value in traffic
received from the Cisco IP Phone.
or
Configures the routed port to trust the DSCP value in traffic
received from the Cisco IP Phone.
By default, the port is not trusted.
Specifies that the Cisco IP Phone is a trusted device.
You cannot enable both trusted boundary and auto-QoS (auto
qos voip interface configuration command) at the same time;
they are mutually exclusive.
To disable the trusted boundary feature, use the no mls
Note
qos trust device interface configuration command.
Returns to privileged EXEC mode.
How to Configure QoS
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