08-13-2008 10:03 PM - edited 03-06-2019 12:47 AM
Cisco 3661 router hanging problem .evev though console is not available needs to hard reboot.
#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3660-IO3-M), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 16:55 by dchih
ROM: System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)
COS-DADAR-3661 uptime is 1 minute
System returned to ROM by bus error at PC 0x6955210C, address 0x0
System image file is "flash:c3660-io3-mz.123-26.bin"
cisco 3660 (R527x) processor (revision 1.0) with 46080K/19456K bytes of memory.
Processor board ID JAB042387EB
R527x CPU at 225MHz, Implementation 40, Rev 10.0, 2048KB L2 Cache
Channelized E1, Version 1.0.
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.
3660 Chassis type: ENTERPRISE
1 FastEthernet/IEEE 802.3 interface(s)
65 Serial network interface(s)
2 Channelized E1/PRI port(s)
DRAM configuration is 64 bits wide with parity disabled.
125K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
08-13-2008 10:14 PM
08-14-2008 03:33 AM
Yogesh
The bus error mentioned in your output might be due to a software error or might be a hardware error. With the output of show version or of show tech you might be able to use the output interpreter on the Cisco web site to identify your problem.
This link is a good article on dealing with bus errors:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00800cdd51.shtml
And if the router is covered under a maintenance plan you could open a case with TAC and have them help you to diagnose and correct the problem.
HTH
Rick
08-14-2008 03:39 AM
Yogesh
After my first post I decided to take the show version output from your original post and put it into the output interpreter. Here is the significant part of the output:
ERROR: This router was last restarted by a bus error:
'bus error at PC 0x6955210C, address 0x0'
The system encounters a bus error when the processor tries to access a memory location
that either does not exist (a software error) or does not respond properly (a hardware
problem).
TRY THIS: Issue a 'show region' and check if the address location (the 'address'
part of the bus error - 0x0) falls within an existing address range. If the address
reported by the bus error does not fall within the ranges displayed in the 'show
region' output, this means that the router was trying to access an invalid address.
This indicates that it is a Cisco IOS Software problem. Paste the output from the
'show stacks' command to decode the output and identify the Cisco IOS Software
bug that is causing the bus error. If the address falls within one of the ranges
in the 'show region' output, it means that the router was accessing a valid memory
address, but the hardware corresponding to that address is not responding properly.
This indicates a hardware problem. Try reseating the hardware belonging to this
address range before attempting to replace it. Use the Troubleshooting Bus Error
Crashes document for additional assistance.
HTH
Rick
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