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Community Member

OUTPUT INTERPRETOR - TRACEBACK DECODER

hi all

i'm trying to find the cause of my 4500 reloading - the crashdump shows:

Nov 28 11:29:19: %C4K_SWITCHINGENGINEMAN-3-PPECELLDUPDETECTED: Free cell duplicate(s) detected 5343. System will be reset

however when i try and use the output interpretor for the stack decode i get an error msg:

ERROR: Traceback information was not found.
In order to decode the Traceback information, the Stack Decoder requires the platform
and version information to be present in the output and precede any Tracebacks
or Stack Traces.
TRY THIS: Collect the output of the 'show version' command, and the Traceback or
Stack Trace information and submit it to the Output Interpreter.
Here is an example of a Traceback output with version information:

Cisco Internetwork Operating System Software
IOS (tm) RSP Software (RSP-PV-M), Version 12.0(19)S2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
TAC Support: http:www.cisco.comtac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sat 02-Feb-02 21:27 by dchih
Image text-base: 0x60010968, data-base: 0x60DAE000
Traceback=  0x60251F84  0x60254820  0x60250A58  0x602549F0  0x60257E0C
0x601E6B8C  0x601E6C38  0x6015332C  0x60153500  0x601CC454  0x601CC440
NOTE: Stack Trace information or Alignment Data can be substituted for the Traceback
information.

this is what i tried pasting:

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-ENTSERVICESK9-M), Version 12.2(44)SG, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Mon 24-Mar-08 21:04 by prod_rel_team

Image text-base: 0x10000000, data-base: 0x11D1C2D8

ROM: 12.2(31r)SG3

Dagobah Revision 95, Swamp Revision 28

Traceback: 1180147C 11CCAB20 11C773A0 11D18204 11C7854C 11D182D4 117EC66C 117EC6D4 116B7FB0 116B816C 116B8324 116B84B4 105A6564 1059D7EC

any idea's why i get this error?

2 REPLIES

OUTPUT INTERPRETOR - TRACEBACK DECODER

Hi Michael,




"C4K_SWITCHINGENGINEMAN-3-PPECELLDUPDETECTED" prior to switch reboot indicates software has detected duplicate packet cell in PPE freelist memory. The PPE freelist tracks all free and available packet cells whose buffers can be used for incoming packets. Software detects cell duplication and resets the box to avoid corruption in the packet cell freelist. The decision to have the switch reset is done because duplicate cells on the freelist causes further freelist corruption resulting in weird packet processing behaviors, packet errors and packet buffer leaks which can eventually lead to stoppage of all packet switching through the box. For the ASIC on this SUP, duplicate cells can sometimes appear on the freelist as a result of a parity error in this memory. This has generally been found to be a very rare occurrence and was not found by development to occur more than once on any SUP. Thus, it is recommended that the switch be left running in a monitoring status. If the problem is seen further, it is likely the SUP is becoming faulty and would require replacement.


Please rate the helpfull posts.
Regards,
Naidu.

Community Member

OUTPUT INTERPRETOR - TRACEBACK DECODER

hi latchum,

yes thank you for your interest - i have also found that info on another post - but what i'm really looking to know is why the output interpretor is not giving me the traceback decode???

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