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Cisco Bug: CSCup13397 - GW returns wrong "Default-EPS-Bearer-Qos-modification-failure" on attach

Last Modified

Jan 28, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(19)

Description (partial)

Symptom:
Problem Details: The PGW is incorrectly reporting "Default-EPS-Bearer-Qos-modification-failure" to PCRF on initial attach.  The reporting of the Event-trigger to PCRF, the PGW incorrectly indicating QCI ?5 as default bearer, while is should be QCI 8.

- Create Session Request ? PKT# 29
- CCR-I to PCRF (with the HSS provided QoS ? 8 , ARP ? 10) - PKT # 36
- CCA-I from PCRF installs rule RTRRule3300  (with Default bearer QoS ? Qci ? 8) - PKT# 37
- CCR-I to RTR.  PKT # 38
- CCA-I to RTR (Successful) - PKT# 39
- CCR-U to PCRF (DEFAULT-EPS-BEARER-QOS-MODIFICATION-FAILURE) with Default QoS, QCI ? 5.  PKT# 40   <<<<< This is where the issue appears to be
- Create Session Response (successful with QCI ? 8) - PKT# 44
- CCA-U from PCRF sends Default-EPS-Bearr-QoS with QoS-QCI ? 5 # PKT# 42

This is forcing PGW to send the update bearer request.  Rightfully the access side/MME is rejecting the UBRequest.

Conditions:
Normal use.
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