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Cisco Bug: CSCvv75297 - [BP-ICUPS]: flow limit is not applied if dynamic rule installed for ongoing session

Last Modified

Sep 28, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.17.9

Description (partial)

Symptom:
We have observed following problem in customer iCUPS setup .  Same flow is working perfectly in legacy nodes.

UE created an active charging session with an ruledef which doesn't have flow limit in charging-action . 
Packet hitting right rules and UE can send traffic without any bandwidth limit . 
Now while session is active and if we install and high priority dynamic only rule from pcrf , which is mapped to charging-action with flow limit defined . 

Observation is , 
1. Packet is now hitting the new activated dynamic rule and charging-action which is expected . 
2. Even-though its hitting right charging-action , flow limit is not applied to that flow . This is not expected .
3. If dynamic rule is installed during the session setup ( CCA-I ) then we see flow limit is applied as expected

Conditions:
We have observed following problem in customer iCUPS setup .  Same flow is working perfectly in legacy nodes.

UE created an active charging session with an ruledef which doesn't have flow limit in charging-action . 
Packet hitting right rules and UE can send traffic without any bandwidth limit . 
Now while session is active and if we install and high priority dynamic only rule from pcrf , which is mapped to charging-action with flow limit defined . 

Observation is , 
1. Packet is now hitting the new activated dynamic rule and charging-action which is expected . 
2. Even-though its hitting right charging-action , flow limit is not applied to that flow . This is not expected .
3. If dynamic rule is installed during the session setup ( CCA-I ) then we see flow limit is applied as expected
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