08-15-2003 08:34 PM - edited 03-02-2019 09:38 AM
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-JS-M), Version 12.1(3a)T1, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Sat 29-Jul-00 11:48 by ccai
Image text-base: 0x60008950, data-base: 0x61346000
ROM: System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
System returned to ROM by watchdog timer expired
System restarted at 12:00:11 Beijing Sat Aug 16 2003
System image file is "flash:c3640-js-mz.121-3a.T1.bin"
Thanks
08-15-2003 10:40 PM
Hi,
Do have the output of "show stack" after the crash.
FG
08-20-2003 12:44 AM
yeah........ it will restart.. but in majority of the cases apart from the hardware issue........ high throttling and overloading is the one to blame upon....... in that case just try upgrading to a mainline IOS. In the show interface status specially ethernet u can get this indication of high throttling..... or otherwise if the router is having some modular cards, errors in those can also be the cause.
But the best bet is to analyse the show stack.....
08-20-2003 02:02 AM
Your router restarted because of:
"System returned to ROM by watchdog timer expired".
Cisco processors have timers that guard against certain types of system hangs. The CPU periodically resets a watchdog timer. The watchdog timer basically controls the time of each process. If the timer is not reset, a trap occurs. If a process is longer than it should be, the watchdog timer is used to escape from this process.
There are two main types of watchdog timeouts.
The first type is usually caused by a software problem.
The second type of watchdog timeout is usually due to a hardware problem and is reported in one or both of these two ways:
The show version command output shows:
Router uptime is 17 minutes
System returned to ROM by watchdog timer expired
System image file is "flash:c3640-is-mz.122-3.bin"
The console logs show:
System returned to ROM by watchdog timer expired
*** Watch Dog Timeout ***
PC = 0x800001b4, SP = 0x61e19590
Both of these are potential software issues and need further investigation based on their symptoms. For troubleshooting Watchdog Timeout crashes, see:
http://www.cisco.com/warp/public/122/crashes_watchdog_timeout.shtml
HTH
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