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Cisco Bug: CSCvt53392 - DNAC App Policy failed when changing Queuing policy bandwidth allocation

Last Modified

Aug 14, 2020

Products (1)

  • Cisco DNA Center

Known Affected Releases

DNAC1.3.1.4

Description (partial)

Symptom:
DNA Center will report a failed App Policy deployment status when changing the bandwidth settings in the Queueing policy that is already applied to an App Policy. 

When restoring the switch config and reapplying the same App policy with the same changes no error is seen.

Conditions:
DNAC 1.3.1.4
9300 16.9.4
9500 16.12.2


The error is seen when the existing configuration includes 'random detect dscp-based' and 'random-detect dscp' in a class-map. 

Example:
class DNA-EZQOS_2P6Q3T_9K#BULK-DATA
bandwidth remaining percent x
random-detect dscp-based
random-detect dscp af11 percent x y

AND when changing the queuing policy the DNA Center generates a config to update the class with the following command without removing 'random-detect dscp-based' first before 'bandwidth remaining percent'.

sample update config:
policy-map DNA-dscp#APIC_QOS_Q_OUT
class DNA-EZQOS_2P6Q3T_9K#BULK-DATA
no bandwidth remaining percent

Error seen in DNA Center deployment status is 'no bandwidth remaining percent random-detect is allowed without a bandwidth or shape feature. Remove random-detect before removing bandiwidth’.

When executing the CLI manually on the switch the following error is seen:
Edge2(config-pmap)#class DNA-EZQOS_2P6Q3T_9K#BULK-DATA
Edge2(config-pmap-c)#no queue-buffers ratio 10
Edge2(config-pmap-c)#no bandwidth remaining percent
random-detect is not allowed without a bandwidth or shape feature.
Remove random-detect before removing bandwidth.

This is the correct sequence of the CLI template that correctly updates the class. 
 
Edge2(config-pmap)#class DNA-EZQOS_2P6Q3T_9K#BULK-DATA
Edge2(config-pmap-c)# no random-detect dscp-based
Edge2(config-pmap-c)#no bandwidth remaining percent
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