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Cisco Bug: CSCvs72210 - CUPS CP: SM crash Assertion failure at sess/snx/drivers/sgw/sgw_pdn_fsm_util.c:3895 sgwdrv_send_crea

Last Modified

May 27, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.15.17.74096

Description (partial)

Symptom:
Sessmgr reload happen for multi pdn call

Conditions:
- Idle mode TAU SGW handoff for collapsed PDN happened.
- There seems to be MME misbehavior Idle mode TAU SGW handoff in CreatesSessionReq linked_eps_bearer_id is not coming So we are assuming this as GNGP handoff as per spec our behavior seems correct.
- In connecting state due to this GNGP handoff assumption and mean time some deletion is trigger during this hand-off window wrong state handling triggering leading to inconsistency in system
- New Pure-S PDN create request came in this inconsistent state lead to sessmgr restart
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