Cisco Catalyst 3560X-24P Command Reference Manual page 89

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
The switch applies the auto-QoS-generated commands as if the commands were entered from the
Note
command-line interface (CLI). An existing user configuration can cause the application of the generated
commands to fail or to be overridden by the generated commands. These actions occur without warning.
If all the generated commands are successfully applied, any user-entered configuration that was not
overridden remains in the running configuration. Any user-entered configuration that was overridden can
be retrieved by reloading the switch without saving the current configuration to memory. If the generated
commands fail to be applied, the previous running configuration is restored.
After auto-QoS is enabled, do not modify a policy map or aggregate policer that includes AutoQoS in its
name. If you need to modify the policy map or aggregate policer, make a copy of it, and change the
copied policy map or policer. To use the new policy map instead of the generated one, remove the
generated policy map from the interface, and apply the new policy map.
To display the QoS configuration that is automatically generated when auto-QoS is enabled, enable
debugging before you enable auto-QoS. Use the debug auto qos privileged EXEC command to enable
auto-QoS debugging. For more information, see the
To disable auto-QoS on a port, use the no auto qos trust interface configuration command. Only the
auto-QoS-generated interface configuration commands for this port are removed. If this is the last port
on which auto-QoS is enabled and you enter the no auto qos trust 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).
Examples
This example shows how to enable auto-QoS for a trusted interface with specific cos classification.
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# auto qos trust cos
You can verify your settings by entering the show auto qos interface interface-id privileged EXEC
command.
Related Commands Command
debug auto qos
mls qos trust
srr-queue bandwidth share
queue-set
show auto qos
show mls qos interface
OL-21522-02
debug auto qos
Description
Enables debugging of the auto-QoS feature.
Configures the port trust state.
Assigns the shared weights and enables bandwidth sharing
on the four egress queues mapped to a port.
Maps a port to a queue-set.
Displays auto-QoS information.
Displays QoS information at the port level.
Catalyst 3750-X and 3560-X Switch Command Reference
auto qos trust
command.
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