25-6
Catalyst 2360 Switch Software Configuration Guide
OL-19808-01
Chapter 25 Configuring QoS
Configuring QoS
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
“Configuring the CoS Value for an
Interface” section on page 25-6
Configuring the CoS Value for an Interface
QoS assigns the CoS value specified with the
mls qos cos
interface configuration command to untagged
frames received on trusted and untrusted ports.
Beginning in privileged EXEC mode, follow these steps to define the default CoS value of a port or to
assign the default CoS to all incoming packets on the port:
To return to the default setting, use the
no mls qos cos
{
default-cos
|
override
} interface configuration
command.
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.
Command
Purpose
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface
interface-id
Specify the port to be configured, and enter interface configuration mode.
Valid interfaces include physical ports.
Step 3
mls qos cos
{
default-cos
|
override
}
Configure the default CoS value for the port.
•
For
default-cos,
specify a default CoS value to be assigned to a port. If
the packet is untagged, the default CoS value becomes the packet CoS
value. The CoS range is 0 to 7. The default is 0.
•
Use the
override
keyword to override the previously configured trust
state of the incoming packet and to apply the default port CoS value to
the port on all incoming packets. By default, CoS override is disabled.
Use the
override
keyword when all incoming packets on specified ports
deserve higher or lower priority than packets entering from other ports.
Even if a port was previously set to trust CoS, this command overrides
the previously configured trust state, and all the incoming CoS values
are assigned the default CoS value configured with this
command. If an
incoming packet is tagged, the CoS value of the packet is modified with
the default CoS of the port at the ingress port.
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.
