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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 52 Configuring QoS
Configuring QoS on the Switch
Note Configure the marked-down DSCP values that map to the CoS values that are consistent with the
markdown penalty (see the “Mapping the Internal DSCP Values to the Egress CoS Values” section on
page 52-74).
To revert to the default DSCP markdown value mapping, perform this task in privileged mode:
This example shows how to revert to the DSCP markdown map defaults:
Console> (enable) clear qos policed-dscp-map
QoS dscp-cos-map setting restored to default.
Console> (enable)
Note Without the normal-rate or the excess-rate keywords, the clear qos policed-dscp-map command clears
only the normal policed-dscp map.
Displaying QoS Information
To display the QoS information, perform this task:
This example shows how to display the QoS runtime information for port 2/1:
Console> show qos info config 2/1
QoS setting in NVRAM:
QoS is enabled
Port 2/1 has 2 transmit queue with 2 drop thresholds (2q2t).
Port 2/1 has 1 receive queue with 4 drop thresholds (1q4t).
Interface type:vlan-based
ACL attached:
The qos trust type is set to untrusted.
Default CoS = 0
Queue and Threshold Mapping:
Queue Threshold CoS
----- --------- ---------------
1 1 0 1
1 2 2 3
2 1 4 5
2 2 6 7
Rx drop thresholds:
Rx drop thresholds are disabled for untrusted ports.
Queue # Thresholds - percentage (abs values )
Task Command
Step 1
Revert to the DSCP markdown map defaults. clear qos policed-dscp-map
[normal-rate | excess-rate]
Step 2
Verify the configuration. show qos maps {config | runtime}
[cos-dscp-map | ipprec-dscp-map |
dscp-cos-map | policed-dscp-map]
Task Command
Display the QoS information. show qos info [runtime | config]
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