[c-nsp] 7206VXR Rebooting (heat related)

[Steve Coleman]

IT's a physical region, so apparently not a IOS problem.  however, the "region" is pretty ambigious. What is that region?  

cisco3.slc#sh region address 1630810206
Address 0x6134305E is located physically in :

  Name  : data
  Class : IData
  Media : R/W
  Start : 0x61302000
  End   : 0x61E1B3BF
  Size  : 0x00B193C0


cisco3.slc#sh region
Region Manager:

      Start         End     Size(b)  Class  Media  Name
 0x0E000000  0x0FFFFFFF    33554432  Iomem  R/W    iomem2
 0x20000000  0x21FFFFFF    33554432  Iomem  R/W    iomem
 0x5E000000  0x5FFFFFFF    33554432  Iomem  R/W    iomem2:(iomem2_cwt)
 0x60000000  0x6DFFFFFF   234881024  Local  R/W    main
 0x60008940  0x61301343    19892740  IText  R/O    main:text
 0x61302000  0x61E1B3BF    11637696  IData  R/W    main:data
 0x61E1B3C0  0x6210A9DF     3077664  IBss   R/W    main:bss
 0x6210A9E0  0x6DFFFFFF   200234528  Local  R/W    main:heap
 0x70000000  0x71FFFFFF    33554432  Iomem  R/W    iomem:(iomem_cwt)
 0x80000000  0x8DFFFFFF   234881024  Local  R/W    main:(main_k0)
 0xA0000000  0xADFFFFFF   234881024  Local  R/W    main:(main_k1)
  ----- Original Message ----- 
  From: Gerhard Bauer 
  To: Steve Coleman ; cisco-nsp at puck.nether.net 
  Sent: Tuesday, June 21, 2005 1:16 AM
  Subject: Re: [c-nsp] 7206VXR Rebooting (heat related)


  Hi Steve, i think this is a memory problem. i have decode the bus error. see below. gb Back to top SHOW VERSION NOTIFICATIONS (if any) Jump to Section: CONFIGURATION REGISTER ANALYSIS ERROR: This router was last restarted by a bus error: 'bus error at PC 0x60104C78, address 0x6134305E at 12:4' 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 - 0x6134305E) 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. 

  I have a 7206VXR that is extremely sensitive to heat. We had a hot day today (93 outside), and our primary A/C failed, so our server room got warm (85 'ish) before the A/C was fixed. Anytime the ambient air gets above about 80, the 7206 starts to reboot itself every 5 to 10 minutes. 
  > 
  > It's definitely heat related. It's happened before, and you can practically set your watch to it. As soon as the room cools back down, it runs normally again. 
  > 
  > According to Cisco, the 7206 can withstand environmental conditions up to 104 degrees. When I did a "sh env" it reported everything as normal, even when it was continually rebooting itself. A "sh env all" would show all the temperatures within an acceptable limit, despite it being warm in the room. 
  > 
  > I even removed the unit from the cabinet and placed a large fan blowing towards the fan inlets on the left side of the unit, but it didn't help. Not until the ambient temperature in the room came back down to under 80 would it work reliably. No other piece of equipment failed due to the heat. Fortunately we have two other Cisco routers that were running fine. 
  > 
  > Why is this router so sensitive? Any thoughts on this? 
  > 
  > Cisco Internetwork Operating System Software
  > IOS (tm) 7200 Software (C7200-IS-M), Version 12.2(17a), RELEASE SOFTWARE (fc1)
  > Copyright (c) 1986-2003 by cisco Systems, Inc.
  > Compiled Thu 19-Jun-03 12:41 by pwade
  > Image text-base: 0x60008940, data-base: 0x61302000
  > 
  > ROM: System Bootstrap, Version 12.0(19990210:195103) [12.0XE 105], DEVELOPMENT S
  > OFTWARE
  > BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(21)S, EARLY DEPLOYMENT RELEA
  > SE SOFTWARE (fc1)
  > 
  > cisco3.slc uptime is 1 hour, 16 minutes
  > System returned to ROM by bus error at PC 0x60104C78, address 0x6134305E at 12:4
  > 7:08 UTC Mon Jun 20 2005
  > System image file is "disk0:c7200-is-mz.122-17a.bin"
  > 
  > cisco 7206VXR (NPE300) processor (revision B) with 229376K/65536K bytes of memor
  > y.
  > Processor board ID 30468806
  > R7000 CPU at 262Mhz, Implementation 39, Rev 1.0, 256KB L2, 2048KB L3 Cache
  > 6 slot VXR midplane, Version 2.7
  > 
  > Last reset from power-on
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