I have (2) WS-C3750G-12S switches that I am reutilizing (extras IT had available) that were both initially at fw 12.2(25)SEC configured in a stack. Switch 1 appeared to have a problem and would not boot after a power outage (Unexpected exception to CPUvector 1100, PC = 44EC5C
-Traceback= 44EC5C 4536DC 459918 45E998 45EBDC 79FC48 799E8C) and is now showing checksum errors... (I was able to get the system up at one point (see below). I don't know how, but was able to upgrade the fw to 12.2(55)SE6).
Currently switch 1 is getting checksum errors and is reloading without ever actually completing the boot process - both connected in the stack and standalone, no differences. The output from this is below.
... cisco Systems, Inc.
170 West Tasman Drive
San Jose, California 95134-1706
Cisco IOS Software, C3750 Software (C3750-IPSERVICESK9-M), Version 12.2(55)SE6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Mon 23-Jul-12 13:22 by prod_rel_team
Image text-base: 0x01000000, data-base: 0x02F00000
Initializing flashfs...
flashfs[1]: 79 files, 6 directories
flashfs[1]: 0 orphaned files, 0 orphaned directories
flashfs[1]: Total bytes: 15998976
flashfs[1]: Bytes used: 13567488
flashfs[1]: Bytes available: 2431488
flashfs[1]: flashfs fsck took 2 seconds.
flashfs[1]: Initialization complete....done Initializing flashfs.
Checking for Bootloader upgrade.. not needed
Code checksum failed--memory corruption likely
%Software-forced reload
Preparing to dump core...
00:00:09 UTC Mon Mar 1 1993: Unexpected exception to CPUvector 2000, PC = 1BD2A98
-Traceback= 1BD2A98 1BD2A98 2AF6BF0 1BD4A68 1BCB4E0
=== Flushing messages (00:00:09 UTC Mon Mar 1 1993) ===
Buffered messages:
Queued messages:
Cisco IOS Software, C3750 Software (C3750-IPSERVICESK9-M), Version 12.2(55)SE6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Mon 23-Jul-12 13:22 by prod_rel_team
Debug Exception (Could be NULL pointer dereference) Exception (0x2000)!
SRR0 = 0x02B032B4 SRR1 = 0x00029230 SRR2 = 0x01BD2A98 SRR3 = 0x00029230
ESR = 0x00000000 DEAR = 0x00000000 TSR = 0x84000000 DBSR = 0x10000000
CPU Register Context:
Vector = 0x00002000 PC = 0x01BD2A98 MSR = 0x00029230 CR = 0x20000008
LR = 0x01BD2A98 CTR = 0x01BCD74C XER = 0x6000006A
R0 = 0x01BD2A98 R1 = 0x04371340 R2 = 0x00000000 R3 = 0x00000000
R4 = 0x02B032B4 R5 = 0x00029230 R6 = 0x00029230 R7 = 0xBEEFCAFE
R8 = 0x00000000 R9 = 0x03EC0000 R10 = 0x03DD3180 R11 = 0x03DD3090
R12 = 0x000024C4 R13 = 0x00110000 R14 = 0x02AF6BDC 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 = 0x02DD9C08 R30 = 0x06A14953 R31 = 0x00000003
Stack trace:
PC = 0x01BD2A98, SP = 0x04371340
Frame 00: SP = 0x04371350 PC = 0x01BD2A98
Frame 01: SP = 0x04371370 PC = 0x01BD5D94
Frame 02: SP = 0x04371388 PC = 0x02AF6BF0
Frame 03: SP = 0x04371390 PC = 0x01BD4A68
Frame 04: SP = 0x00000000 PC = 0x01BCB4E0
Switch uptime is 11 seconds
cisco WS-C3750G-12S (PowerPC405) processor (revision M0) with 131072K bytes of memory.
Processor board ID CAT0926X07J
Ok, the memory might be on it's way out on switch 1 - but I can get into the bootloader prompt but that is as far as I seem to be able to get. Anything I look at or change, produces the same result.
The big issue I have now is that I have no way to access switch 2, even if I disconnect the switch from the stack and run it standalone. When I apply power, the Syst LED flashes a few times and then goes solid. Nothing is written out of the console port.
I had a failed xmodem transfer attempt to put another firmware (.bin) file on the switch that failed due to insufficient memory earlier and had taken the switch out of the stack, connected the stack cables between ports 1 and 2 (a 1 switch stack) and that let me get into the switch 2 and set an IP address etc. (switch# setup). After I did that, I was able to power the switch down, disconnect the cables, boot the switch (successfully) then connect switch 1 again and power it up. Everything appeared to be OK, they saw that they were a stack and assigned stack numbers as expected. This is when I was able to update the firmware (archive download-sw /overwrite /reload....) which updated both switches in the stack, however it gave me a message that it skipped the reload because changes had been made. I saved the configuration and rebooted the switch and that is when I got back into the boot loop on switch1 with switch 2 being unresponsive.
Can anyone help me understand how I can gain access to switch 2 again? Previously, I could get to the bootloader prompt on switch 2, but now, nothing.
Also, not that I think it really matters, but it may... I have removed all of the SFPs - mixture of 1000F (fiber)and 1000T (copper) - all Cisco. The two switches have different bootloader versions (12.2(44)xxx (not sure) on switch 1 and 12.2(25r)SEB1 on switch 2.
Any insight would be helpful.
