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Cisco Bug: CSCuq51504 - CWS: IOS HTTPS Stale Sessions after receiving Client HELLO

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.3(3)M3

Description (partial)

Symptom:
1) High Memory Utilization stats
2) Low memory /memory fragmentation errors
3) stale sessions in cws table with 519:0 bytes counter

Conditions:
The client is trying to open https connection and ISR is redirecting HTTPS traffic to CWS
the client sends a FIN ACK right after the Client HELLO. In some cases the client might receive an ACK to the Client HELLO and then send a FIN ACK packet
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