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Cisco Bug: CSCuj08831 - Crash @ ipc_compare_seats part 2

Last Modified

Jun 13, 2019

Products (4)

  • Cisco IOS
  • Cisco Catalyst 6500 Series Virtual Switching Supervisor Engine 720 with 10GE uplinks
  • Cisco Catalyst 6500 Series Supervisor Engine 2T
  • Cisco Catalyst 6500 Series Supervisor Engine 720 / MSFC3

Known Affected Releases

15.1(1)SY1

Description (partial)

Symptom:
A crash is seen:

 17:53:55 UTC Wed Aug 28 2013: Unexpected exception to CPU: vector 1400, PC = 0x61F7428 , LR = 0x61FE1E8 
-Traceback= 61F7428 61FE1E8 61F8718 61E3C4C 61E43F0 4FCED04 4FCF99C 8711854 8712EDC 8704E78 523A288 4FD5024 4FD5024 523A338

Conditions:
In one case a server was being used to automatically update a huge ACL list when traffic from untrusted IPs hit it. When the traffic is classified as trusted, the ACL statements are changed to allow that IP address automatically. The ACL is huge and does cause overhead. Since the issue deals with IPC, it might be something that is relevant to trigger the issue since adding a large amount of statements could cause some IPC messages to be sent between line cards and the Sup. This is still being investiaged to find out the relevance as well as to investigate any other possible conditions that might be causing the issue. The issue is related to IPC so the idea is that a large amount of IPC communciation might help trigger this issue.
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