Cisco Systems 3560 Manual De Usuario
34-37
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 34 Configuring QoS
Configuring Standard QoS
Beginning in privileged EXEC mode, follow these steps to configure the port to trust the classification
of the traffic that it receives:
of the traffic that it receives:
To return a port to its untrusted state, use the no mls qos trust interface configuration command.
For information on how to change the default CoS value, see the
. For information on how to configure the CoS-to-DSCP map, see the
.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface interface-id
Specify the port to be trusted, and enter interface configuration
mode.
mode.
Valid interfaces include physical ports.
Step 3
mls qos trust [cos | dscp | ip-precedence]
Configure the port trust state.
By default, the port is not trusted. If no keyword is specified, the
default is dscp.
default is dscp.
The keywords have these meanings:
•
cos—Classifies an ingress packet by using the packet CoS value.
For an untagged packet, the port default CoS value is used. The
default port CoS value is 0.
For an untagged packet, the port default CoS value is used. The
default port CoS value is 0.
•
dscp—Classifies an ingress packet by using the packet DSCP
value. For a non-IP packet, the packet CoS value is used if the
packet is tagged; for an untagged packet, the default port CoS is
used. Internally, the switch maps the CoS value to a DSCP value
by using the CoS-to-DSCP map.
value. For a non-IP packet, the packet CoS value is used if the
packet is tagged; for an untagged packet, the default port CoS is
used. Internally, the switch maps the CoS value to a DSCP value
by using the CoS-to-DSCP map.
•
ip-precedence—Classifies an ingress packet by using the
packet IP-precedence value. For a non-IP packet, the packet CoS
value is used if the packet is tagged; for an untagged packet, the
default port CoS is used. Internally, the switch maps the CoS
value to a DSCP value by using the CoS-to-DSCP map.
packet IP-precedence value. For a non-IP packet, the packet CoS
value is used if the packet is tagged; for an untagged packet, the
default port CoS is used. Internally, the switch maps the CoS
value to a DSCP value by using the CoS-to-DSCP map.
Step 4
end
Return to privileged EXEC mode.
Step 5
show mls qos interface
Verify your entries.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.