Cisco IE-3000-8TC Software Configuration Manual page 706

Configuring Standard QoS
Command
Step 5
trust [cos | dscp | ip-precedence]
Step 6 set {dscp new-dscp | ip precedence
new-precedence}
Cisco IE 3000 Switch Software Configuration Guide
36-46
Purpose
Configure the trust state, which QoS uses to generate a CoS-based or
DSCP-based QoS label.
Note This command is mutually exclusive with the set command
within the same policy map. If you enter the trust command,
go to Step 6.
By default, the port is not trusted. If no keyword is specified when the
command is entered, the default is dscp.
The keywords have these meanings:
cos—QoS derives the DSCP value by using the received or default
•
port CoS value and the CoS-to-DSCP map.
dscp—QoS derives the DSCP value by using the DSCP value from
•
the ingress packet. For non-IP packets that are tagged, QoS derives
the DSCP value by using the received CoS value; for non-IP
packets that are untagged, QoS derives the DSCP value by using
the default port CoS value. In either case, the DSCP value is
derived from the CoS-to-DSCP map.
ip-precedence—QoS derives the DSCP value by using the IP
•
precedence value from the ingress packet and the
IP-precedence-to-DSCP map. For non-IP packets that are tagged,
QoS derives the DSCP value by using the received CoS value; for
non-IP packets that are untagged, QoS derives the DSCP value by
using the default port CoS value. In either case, the DSCP value is
derived from the CoS-to-DSCP map.
For more information, see the
section on page 36-51.
Classify IP traffic by setting a new value in the packet.
• For dscp new-dscp, enter a new DSCP value to be assigned to the
classified traffic. The range is 0 to 63.
For ip precedence new-precedence, enter a new IP-precedence
•
value to be assigned to the classified traffic. The range is 0 to 7.
Chapter 36
"Configuring the CoS-to-DSCP Map"
Configuring QoS
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