Reference v4.1.0 Instruction Manual

Network OS Command Reference 587

53-1003115-01

qos trust cos

Specifies the interface QoS trust Class of Service (CoS) mode for incoming traffic.

Synopsis qos trust cos

no qos trust cos

Operands None

Defaults The QoS trust mode set to the untrusted state.

Command Modes Interface subtype configuration mode

Description Use this command to specify the interface ingress QoS trust CoS mode, which controls user

priority mapping of incoming traffic. The untrusted mode overrides all incoming priority markings

with the Interface Default CoS. The CoS mode sets the user priority based on the incoming CoS

value, if the incoming packet is not priority tagged, then fallback is to the Interface Default CoS

value.

Usage Guidelines When a CEE map is applied on an interface, the qos trust cos command is not allowed. The CEE

map always puts the interface in the CoS trust mode.

Enter no qos trust cos to return to the default.

Examples To set the interface QoS to the CoS trust mode for a specific 10-gigabit Ethernet interface:

switch(config)# interface tengigabitethernet 178/0/9

switch(conf-if-te-178/0/9)# qos trust cos

To return the interface QoS to the default value or to the untrusted state:

switch(config)# interface tengigabitethernet 178/0/9

switch(conf-if-te-178/0/9)# no qos trust cos

When a CEE map is applied, the switch does not allow the qos trust cos command and displays

the following error:

switch(conf-if-te-0/1)# cee demo

switch(conf-if-te-0/1)# qos trust cos

% Error: QoS is not in non-CEE Provisioning mode

See Also interface qos cos, show qos maps