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Cisco Bug: CSCvv29314 - [UPF-IVT] UPF denies SessEstReq and reporting aaamgr memory limit exhausts

Last Modified

Aug 08, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.15.41.76446

Description (partial)

Symptom:
1) PDU session establishment fails
2) SMF reports session disconnect reason: UPF_Setup_Exchange_Failure
3) UPF stats indicate "Denied" counter incrementing for "Session Establishment Response"

Conditions:
1) 5G attach with some X calls (300K attempted but many of them failed due to this reason)
2) N4 link goes down. UPF does local purge
3) 5G attach call-model started again
4) At this stage, UPF reports these issues.
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