Notes on changing priority settings
If you try to modify the priority associated with a DSCP codepoint in a DSCP policy using the
qos dscp-map priority command, and if the DSCP policy is currently used by one or more global QoS or classifier-based QoS policies, the following error message is displayed:
Cannot modify DSCP Policy codepoint - in use by other qos rules.
In this case, enter the following QoS
show commands to identify in which global and classifier-based QoS configurations the DSCP policy is currently used:
show policy
qos-policy
show qos tcp-udp-port-priority
show qos device-priority
show qos type-of-service
show qos protocol
show qos vlan
show qos port-priority
After determining the QoS configurations in which the DSCP-priority mapping is used, you can either delete a QoS configuration and reset the DSCP-priority mapping to
No-override, or change either the 802.1p priority or the codepoint used in the QoS configuration.
Changing the priority of a codepoint
If codepoint 000001 is currently mapped to priority 6, and several global QoS policies use this codepoint to assign a priority to their respective types of matching traffic, you can change the priority associated with the codepoint using the following procedure.
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Identify the global and classifier-based QoS policies that use the codepoint.
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Do one of the following:
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Reconfigure each QoS policy by re-entering a different DSCP codepoint or a different 802.1p priority associated with the codepoint.
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Enter the
no qos classifierorno policy qos-policycommand to remove the current DSCP policy with codepoint 000001 and reset the priority toNo-override.
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Use the
qos dscp-map 000001 priority 0 - 7command to remap DSCP 000001 to the desired priority. -
Do one of the following:
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Reconfigure codepoint 000001 in the QoS policies in which you want to use the new DSCP-priority mapping to mark matching packets.
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Leave a QoS policy in which you use DSCP 000001 to mark matching packets with the associated
No-overridepriority mapping.
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