Cisco Bug: CSCvv88570 - SMF to handle DSReq (System-failure) -DBReq (RAT-Change) collision
Oct 11, 2020
- Cisco Wireless Mobile Application
Known Affected Releases
Symptom: Wifi to LTE HO calls are dropped Conditions: UE is moving from WiFi to LTE Datapath Switching is already done for default bearer SMF is waiting for CBResp from SGW for initiated CBReq. SMF has not updated Session Info from WiFi->LTE. eDPG sends DSReq (Sytem-Failure) when SMF is waiting on CBResp in LTE. SMF clean up session when DBReq is received in WiFi Context and shall not send DBReq to LTE. Since session cleaning up on SMF and UPF, the SGW might have received ?GTP-U Error Indication? and SGW might have done local-purge.. Later, eNB starts session cleanup.
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