Reference v4.1.0 Instruction Manual

588 Network OS Command Reference

53-1003115-01

qos trust dscp

Enables Differentiated Services Code Point (DSCP) mode for incoming traffic.

Synopsis qos trust dscp

no qos trust dscp

Operands None

Defaults The QoS trust DSCP mode set to the untrusted state.

Command Modes Interface subtype configuration mode

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

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

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

DSCP value, When this feature is not enabled, DSCP values in the packet are ignored.

When DSCP trust is enabled, the following lists the default mapping of DSCP values to user priority.

Usage Guidelines QoS Trust Mode is automatically applied if dscp-cos map or qos dscp traffic class is applied to the

interface.

Enter no qos trust dscp to return to the default.

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

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

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

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 dscp

NOTE

This command is only supported on Brocade VDX 8770-4, VDX 8770-8, and later switches.

See Also interface, qos map dscp-cos, qos map dscp-traffic-class, show qos interface,

show qos maps dscp-traffic-class

Default DSCP priority mapping

DSCP Values User Priority

0-7 0

8-15 1

16-23 2

24-31 3

32-39 4

40-47 5

48-55 6

56-63 7