WS-C3750G-12S stack problems can't recover switches even in standalone mode (no stack)
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
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.
Sending that with xmodem (.bin file only, not .tar which has web pages which are desirable to non-IT folks like me...) as your reply came in. Needed someone in IT w/access to service contract info to download. SE6 was most recent I could get without the service contract number.
There was a glimmer of hope that was quickly dashed.
Switch 1 (now disconnected from stack with cable between stack port 1 and 2) booted, ran for 30 -120 seconds then got the same %Software-forced reload.
I had something going on in there so I have formatted the flash: file system from the bootloader prompt. I'm sending xmodem xfer again to see if there might have been some random 'ghost' due to numerous power outages / crashes etc..
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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