[c-nsp] 2960-X Reboot Loop

[Christopher Werny]

Hello,

may I query the wisdom of this list for feedback regarding an issue we have
with a 2960-X 

Since today, our 2960-X is in a rebooting loop and I see the following error
messages on the local console during the boot process:

Initializing Flash...
mifs[5]: 12 files,Err: Interrupt: Machine check (0x200): Data access error:
    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000
(Bailed out.)
Err: Interrupt: Machine check (0x200): Data access error:
    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000
(Bailed out.)
Err: Interrupt: Machine check (0x200): Data access error:
    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000
(Bailed out.)
Err: Interrupt: Machine check (0x200): Data access error:
    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000
(Bailed out.)
Err: Interrupt: Machine check (0x200): Data access error:
    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000
(Bailed out.)
Err: Interrupt: Machine check (0x200): Data access error:

    PC: 0x1f19f8bc, MSR: 0x00021000, ESR: 0x00000000, MCSR: 0x84800000

(Bailed out.)

 

Panic: Too many exceptions: Turn off Machine Check interrupt!!


 1 directories
mifs[5]: Total bytes     :    1806336
mifs[5]: Bytes used      :     834560
mifs[5]: Bytes available :     971776
mifs[5]: mifs fsck took 2 seconds.
mifs[6]: 1 files, 1 directories
mifs[6]: Total bytes     :    3870720
mifs[6]: Bytes used      :     971264
mifs[6]: Bytes available :    2899456
mifs[6]: mifs fsck took 1 seconds.
mifs[7]: 5 files, 1 directories
mifs[7]: Total bytes     :     258048
mifs[7]: Bytes used      :       8192
mifs[7]: Bytes available :     249856
mifs[7]: mifs fsck took 0 seconds.
mifs[8]: 5 files, 1 directories
mifs[8]: Total bytes     :     258048
mifs[8]: Bytes used      :       8192
mifs[8]: Bytes available :     249856
mifs[8]: mifs fsck took 0 seconds.
mifs[9]: 9 files, 2 directories
mifs[9]: Total bytes     :  122185728
mifs[9]: Bytes used      :   48398848
mifs[9]: Bytes available :   73786880
mifs[9]: mifs fsck took 45 seconds.
...done Initializing Flash.
Loading "flash:c2960x-universalk9-mz.152-4.E1.bin"...Verifying image
flash:c2960x-universalk9-mz.152-4.E1.bin....................................
............n
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@
File "flash:c2960x-universalk9-mz.152-4.E1.bin" uncompressed and installed,
entry point: 0x3000
executing...

 : Unexpected exception to CPUvector 200, PC = 36A0484 
-Traceback= 0x36A0484z 


=== Flushing messages () ===

Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version
15.2(4)E1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Thu 28-Jan-16 15:56 by prod_rel_team

Machine Check Exception (0x0200)!
ESR: 0x00000000
SRR0: 0x036A0484 SRR1: 0x00029200 SRR2: 0x02F35B70 SRR3: 0x00028000
MCSR: 0x84800000
L2MCSR: 0x00000000
 
CPU Register Context:
Vector = 0x00000200  PC = 0x036A0484  MSR = 0x00029200  CR = 0x00000000
LR = 0x0369C1A4  CTR = 0x0369421C  XER = 0xE000007E
R0 = 0x00000000  R1 = 0x0779DD88  R2 = 0x00000000  R3 = 0x00000000
R4 = 0x036A0484  R5 = 0x00029200  R6 = 0xBEEFCAFE  R7 = 0xBEEFCAFE
R8 = 0x00400080  R9 = 0x00000001  R10 = 0x07791160  R11 = 0x07791150
R12 = 0x33003033  R13 = 0x1F1828CC  R14 = 0x02918E6C  R15 = 0x00000000
R16 = 0x00000000  R17 = 0x00000000  R18 = 0x00000000  R19 = 0x00000000
R20 = 0x00000000  R21 = 0x00000000  R22 = 0x00000000  R23 = 0x00000000
R24 = 0x00000000  R25 = 0x00000000  R26 = 0x00000000  R27 = 0x00000000
R28 = 0x00000000  R29 = 0x00000000  R30 = 0x00000000  R31 = 0x00000000

Stack trace:
PC = 0x036A0484, SP = 0x0779DD88
Frame 00: SP = 0x00000000    PC = 0x02951BEC

The only thing I was able to find was a post on the support forum with the
same issue, but with no resolution. I wasn't able to find bug id that would
indicate an IOS bug (but my search skills may have failed me).

https://supportforums.cisco.com/discussion/13092381/cisco-switch-2960-x-seri
es-error

I need to check with TAC, but from your point of view, does it look more
like a hardware failure or a potential IOS bug?

Thanks in advance for your feedback

Cheers,
Christopher