Configuring Standard Qos - Cisco Catalyst 2960 Software Configuration Manual

Chapter 33 Configuring QoS
qos voip command, auto-QoS is considered disabled even though the auto-QoS-generated global
configuration commands remain (to avoid disrupting traffic on other ports affected by the global
configuration).
You can use the no mls qos global configuration command to disable the auto-QoS-generated global
configuration commands. With QoS disabled, there is no concept of trusted or untrusted ports because
the packets are not modified (the CoS, DSCP, and IP precedence values in the packet are not changed).
Traffic is switched in pass-through mode (packets are switched without any rewrites and classified as
best effort without any policing).
Displaying Auto-QoS Information
To display the initial auto-QoS configuration, use the show auto qos [interface [interface-id]]
privileged EXEC command. To display any user changes to that configuration, use the show
running-config privileged EXEC command. You can compare the show auto qos and the show
running-config command output to identify the user-defined QoS settings.
To display information about the QoS configuration that might be affected by auto-QoS, use one of these
commands:
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Note

Configuring Standard QoS

Before configuring standard QoS, you must have a thorough understanding of these items:
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These sections contain this configuration information:
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OL-26520-01
show mls qos
show mls qos maps cos-dscp
show mls qos interface [interface-id] [buffers | queueing]
show mls qos maps [cos-dscp | cos-input-q | cos-output-q | dscp-cos | dscp-input-q |
dscp-output-q]
show mls qos input-queue
show running-config
Catalyst 2960-S switches do not support ingress queueing.
The types of applications used and the traffic patterns on your network.
Traffic characteristics and needs of your network. Is the traffic bursty? Do you need to reserve
bandwidth for voice and video streams?
Bandwidth requirements and speed of the network.
Location of congestion points in the network.
Default Standard QoS Configuration, page 33-38
Standard QoS Configuration Guidelines, page 33-40
Enabling QoS Globally, page 33-42
Configuring Classification Using Port Trust States, page 33-42
Configuring a QoS Policy, page 33-49
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
(required)
(required)
Displaying Auto-QoS Information
(required
33-37