Unexpected exception to CPUvector 700, PC = 51E1F4

[Victor Khomenko]

Hi all, i have old switch Cisco catalyst WS-C3560-24 TS, with installed software iOS C3560-ADVIPSERVICES9-M 12.2(46) SE. The SW was operating normally then give the following error and go in a boot loop:

Unexpected exception to CPUvector 700, PC = 51E1F4
-Traceback = 51E1F4 486180 6AA2D8 6ADA14 6ADDE0 610918 6108C0 6122CC 612784 6109C8 97C68C 97C664 97A5BC

Writing crashinfo to flash:/crashinfo_ext/crashinfo_ext_16

Program Exception (0x0700)!
SRR0 = 0x0051E1F4   SRR1 = 0x00029230   SRR2 = 0x006113D4   SRR3 = 0x00021200
ESR = 0x08000000   DEAR = 0x00000000   TSR = 0x84000000 DBSR = 0x00000000

CPU Register Context:
Vector = 0x00000700   PC 0x0051E1F4   MSR = 0x00029230   CR = 0x20000022
LR = 0x0048624C  CTR = 0x0051E1F0   XER = 0x60000050
R0 = 0x00486180   R1 = 0x02CC1DB8   R2 = 0x00000000   R3 = 0x03031F74
R4 = 0x00000003   R5 = 0x00000000   R6 = 0x0027198D4   R7 = 0x0271A148
R8 = 0x00000000   R9 = 0x0051E1F0   R10 = 0x0x02190000   R11 = 0x00000000
R12 = 0x20000022   R13 = 0x00110000   R14 = 0x08000000   R15 = 0x08000000
R16 = 0x08000000   R17 = 0x0260B484   R18 = 0x0260B44C   R19 = 0x02610000
R20 = 0x0000000F   R21 = 0x024F0000   R22 = 0x02610000   R23 = 0x00000000
R24 = 0x00000576   R25 = 0x00000000   R26 = 0x00000003   R27 = 0x02E8994C
R28 = 0x03031F74   R29 = 0x00000003   R30 = 0x03031F74   R31 = 0x00000000

Stack trace:
PC = 0x0051E1F4,   SP = 0x02CC1DB8
Frame 00: SP = 0x02CC1DC8    PC = 0x02EBDEE0
Frame 01: SP = 0x02CC1E18    PC = 0x00486180
Frame 02: SP = 0x02CC1E40    PC = 0x006AA2D8
Frame 03: SP = 0x02CC1E70    PC = 0x006ADA14
Frame 04: SP = 0x02CC1E90    PC = 0x006ADDE0
Frame 05: SP = 0x0257A9B4    PC = 0x00610918
Frame 06: SP = 0x0257A9C4    PC = 0x006108C0
Frame 07: SP = 0x0257A9DC    PC = 0x006122CC
Frame 08: SP = 0x0257A9E4    PC = 0x00612784
Frame 09: SP = 0x0257AA30    PC = 0x006109C8
Frame 10: SP = 0x026D60D8    PC = 0x0097C68C
Frame 11: SP = 0x026D6120    PC = 0x0097C664
Frame 12: SP = 0xFFFFFFFF    PC = 0x0097A5BC

Switch uptime is 1 minute, 26 seconds

Any help please?

[Richard Burts]

Your output starts with a traceback. traceback is an indicator of a software problem. If you power down, wait a bit, and power up does the switch boot successfully or does it go into a boot loop?

With a traceback we would frequently suggest upgrading the code. But for a switch this old, and guessing that you do not have an active service contract for this switch, I am not sure that a code upgrade is feasible.

[Victor Khomenko]

Richard Burts thx for your answer, and i'm apologize for my late answer - I haven't been on my work for a while, where this switch is situated. When i came back and trying to boot this switch, It seems that this issue is disappeared. It boot perfectly, and there are no boot loops or any errors during his work (for last 2 weeks). I think this topic can be closed, thanks for your answer one more time!

[Richard Burts]

Thanks for the update. I know that when equipment is at a different site that it can take a while to get to it. So delayed response is not a problem. Glad to know that now the switch is working fine. With the traceback I believe that it reflects a software problem. Hopefully whatever triggers the error is rare and will not happen again for a long time.