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Cisco Bug: CSCvw00892 - IKEv1 IPSec CAC (Call Admission Control) counter leak leading to %CRYPTO-4-IKE_DENY_SA_REQ

Last Modified

Oct 14, 2020

Products (1)

  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

16.9.3

Description (partial)

Symptom:
A leak in IPSec SA in-neg counter has been observed leading to %CRYPTO-4-IKE_DENY_SA_REQ.

The leak is observed in the "show crypto call admission statistics" output in section "Total IPSEC SA" and counter "negotiating".

------------------ show crypto call admission statistics ------------------

---------------------------------------------------------------------
               Crypto Call Admission Control Statistics
---------------------------------------------------------------------
System Resource Limit:        0 Max IKE SAs:     0 Max in nego:    100
Total IKE SA Count:         200 active:        195 negotiating:     5
Incoming IKE Requests:     1111 accepted:     1111 rejected:        0
Outgoing IKE Requests:    5555 accepted:    5555 rejected:        0
Rejected IKE Requests:        0 rsrc low:        0 Active SA limit: 0
                                                   In-neg SA limit: 0
IKE packets dropped at dispatch:        0

Max IPSEC SAs:     0
Total IPSEC SA Count:         296 active:        196 negotiating:    100 <<<<<<<<<<<<<<<<<<<<<<<<<
Incoming IPSEC Requests:      555 accepted:      555 rejected:        0
Outgoing IPSEC Requests:    11111 accepted:    11111 rejected:        0

Phase1.5 SAs under negotiation:         0

Conditions:
- Using the following CAC configuration: crypto call admission limit all in-negotiation-sa <limit>
- IKE + IPSec in-neg counters reach the defined threshold
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