Command Reference Guide Ethernet Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 635

qos [trust cos | default-cos <cos value>]

Use the qos (quality of service) command to set the interface to the trusted state and to set the default cost
of service (CoS) value. To return to defaults, use the no version of this command.
Syntax Description
trust cos Sets the interface to the trusted state.
default-cos
<cos value>
Sets the default CoS value for untrusted ports and all untagged packets
(0 to 7).
Default Values
By default, the interface is untrusted with a default CoS of 0.
Applicable Platforms
This command applies to the NetVanta 300, 1000, and 1000R Series units.
Command History
Release 5.1 Command was introduced.
Functional Notes
Set the interface to trust cos if received 802.1P CoS values are considered valid (i.e., no need to
reclassify) and do not need to be tagged with the default value. When set to untrusted, the default-cos
value for the interface is used.
Usage Examples
The following example sets eth 0/1 as a trusted interface and assigns untagged packets a CoS value of 1:
(config)#interface eth 0/1
(config-eth 0/1)#qos trust cos
(config-eth 0/1)#qos default-cos 1