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Cisco Bug: CSCtc23336 - ESS: Stuck EVSI delete allows only one HW-Err for multiple EVSI Reuses

Last Modified

Feb 28, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

12.2XN

Description (partial)

Symptom:
Under heavy PTA or LNS Broadband session flapping or intermittent
feature timing conditions, QFP session resources may not be freed
and will be reused in subsequent new session creations.
This reuse may generate IOS console and/or OS-XR tracelog 
error messages such as, but not limited to:
---
02/14 17:21:02.432 [errmsg]: (ERR): %FMFP-3-OBJ_DWNLD_TO_CPP_FAILED: intf EVSI67206136, handle 67206136, cpp handle 0 download to CPP failed

OR ...

09/28 12:35:50.489 [ess]: (ERR): ess segment get evsi AOM 
obj failed, evsi 16500 seg_id 0x0040740172dc6c ret 0(Success) the evsi is pending for delete.
---

These types of error messages may cause the active session to 
experience internet access failures.

Conditions:

Large scaling of 8K or more and/or heavy session flapping greater than 10% of the active max sessions may trigger this condition.

PPP Keep-Alives will "not" teardown the failed session since the 
Keep-Alive packet handling remains functional.
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