Guest

Cisco 7200 Series Routers

Field Notice: FN - 61703 - NPE-G1, uBR7200-NPE-G1, C7301 and 7304-NPE-G100 May Experience a Software Error Resulting in an Unexpected Reload Due to Watchdog Timeout (WDT)


Revised March 22, 2010

July 01, 2005

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Products Affected
7223 - UBR7200-NPE-G1-BUN
7246 - UBR7200-NPE-G1-BUN
7246-VXR - UBR7200-NPE-G1
7246-VXR - UBR7200-NPE-G1-BUN
PWRUP - UBR7246VXR-NPE-G1
UBR7200 - UBR7200-NPE-G1-BUN
UBR7200 - UBR7200-NPE-G1=
7200 - NPE-G1-BUN
7200 - NPE-G1=
7204 - NPE-G1
7206 - NPE-G1
7206 - NPE-G1-BUN
7300 - CISCO7301-2AC=
7300 - CISCO7301-2DC48=
7301 - CISCO7301
7301 - CISCO7301-BB
7301 - CISCO7301-BB-8K
7301 - CISCO7301=
7304 - 7300-NPE-G100
7304 - 7304-NPE-G100
7304 - 7304-NPE-G100
7304 - 7304-NPE-G100/2
7304 - 7304-NPE-G100/2=
7304 - 7304-NPE-G100=
7200VPN - NPE-G1-BUN
7301VPN - CISCO7301/2+VPNK9
7301VPN - CISCO7301/2VPNK9

Problem Description

The products mentioned in the Products Affected table might unexpectedly reload during normal operation. The router will not generate a crash info file and the CLI command show version issued after the unexpected reload will display Last reset from watchdog reset.

Background

The router has a watchdog system on board which generates interrupts every four milliseconds. The software responds to the interrupts and resets the watchdog. If the software fails to respond and resets the watchdog within 32 milliseconds, the watchdog will first issue a Non-Maskable Interrupt (NMI) to the CPU. If the CPU fails to respond to the NMI a further 42 milliseconds, the watchdog will then issue a "L2 watchdog timeout" and could reset the router.

Under certain rare conditions, specific code sequences can prevent the CPU from executing additional instructions. New versions of software are available which eliminate these failures without affecting system performance or functionality.

Problem Symptoms

The system may reload during normal operation. No crash information will be generated by the router. Below are sample IOS CLI command output show versions from the failed routers.

Note: The CLI phrase "Last reset from watchdog reset" will only be cleared after a power-cycle of the affected route processor. Executing a reload command will not clear the phrase from the boot up message for subsequent reboots.

NPE-G1 and uBR-7200-NPE-G1:

Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-JS-M), Version 12.2(14)S3, EARLY DEPLOYMENT

RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 01-Jul-03 17:53 by kellythw
Image text-base: 0x60008BD4, data-base: 0x6187A000

ROM: System Bootstrap, Version 12.2(8r)B, RELEASE SOFTWARE (fc1)
BOOTLDR: 7200 Software (C7200-KBOOT-M), Version 12.2(4)BW2, EARLY
DEPLOYMENT RELEASE SOFTWARE (fc1)

erc01sinyodo012 uptime is 6 minutes
System returned to ROM by reload at 15:32:45 UTC Fri Aug 22 2003 System image file is "disk2:c7200-js-mz.122-14.S3.bin"

cisco 7206VXR (NPE-G1) processor (revision A) with 245760K/16384K bytes of memory.
Processor board ID 28340933
Unknown CPU at 700Mhz, Implementation 1025, Rev 0.2, 512KB L2 Cache 6 slot VXR midplane, Version 2.6

Last reset from watchdog reset
:

CISCO7301:

7301>sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7301 Software (C7301-JS-M), Version 12.3(5a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Mon 24-Nov-03 18:33 by kellythw
Image text-base: 0x60008AF4, data-base: 0x61F26000

ROM: System Bootstrap, Version 12.2(20021205:022609) [bchang-taz2.rommon 101], D
EVELOPMENT SOFTWARE
BOOTLDR: 7301 Software (C7301-BOOT-M), Version 12.2(16)B, EARLY DEPLOYMENT RELEA
SE SOFTWARE (fc1)

esc-7301 uptime is 1 week, 6 days, 7 hours, 55 minutes
System returned to ROM by reload at 15:33:32 UTC Thu Mar 22 2001
System image file is "tftp://171.68.191.135/c7301-js-mz.123-5a"

cisco 7301 (NPE) processor (revision A) with 983040K/65536K bytes of memory.
Processor board ID 0
SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache
1 slot midplane, Version 2.0

Last reset from watchdog reset
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
3 Gigabit Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
509K bytes of non-volatile configuration memory.

32768K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x0

esc-7301>

7304-NPE-G100:

7304#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7300 Software (C7300-JS-M), Version 12.2(14)SZ3, EARLY DEPLOYMENT RELEA
SE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Wed 30-Jul-03 12:24 by pwade
Image text-base: 0x40008BEC, data-base: 0x42346000

ROM: System Bootstrap, Version 12.2(14r)SZ1, RELEASE SOFTWARE (fc1)
Currently running ROMMON from ROM 1
BOOTLDR: 7300 Software (C7300-JS-M), Version 12.2(14)SZ3, EARLY DEPLOYMENT RELEA
SE SOFTWARE (fc1)

9man-rp03 uptime is 2 weeks, 5 days, 4 hours, 45 minutes
System returned to ROM by power-on
System image file is "disk0:c7300-js-mz.122-14.SZ3.bin"

cisco 7300 (NPEG100) processor (revision A) with 917504K/131072K bytes of memory.
Processor board ID SCA0727014D
SB-1 CPU at 800Mhz, Implementation 1025, Rev 0.2, 512KB L2 Cache
4 slot midplane, Version 67.49

Last reset from watchdog reset

Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
3 Gigabit Ethernet/IEEE 802.3 interface(s)
3 Packet over SONET network interface(s)
1021K bytes of non-volatile configuration memory.

62592K bytes of ATA compact flash in bootdisk (Sector size 512 bytes).
125440K bytes of ATA compact flash in disk0 (Sector size 512 bytes).
Configuration register is 0x2102

Workaround/Solution

The following workarounds are currently available on Cisco Software Center. Affected customers should upgrade to the below noted IOS revisions (or later versions) to correct this issue. Customers should  refer to the noted DDTS and Cisco Software Center for additional releases as they become available. 

NPE-G1
12.2(33)SB3+
12.4(18a) or 12.4(20) or higher

uBR7200-NPE-G1
12.3(13a)BC4
12.3(17a)BC1

Cisco7301
12.2(33)SB6
12.4(18a) or 12.4(20) or higher

7304-NPE-G100
12.2(33)SB6

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCsj78920 (registered customers only)

TITLE: 7200/ubr7200: Router Hang / Watchdog Hard Reset

CSCir01277 (registered customers only)

TITLE: 7304 NPE-G100 Router reboot due to watch dog reset

Revision History

Revision

Date

Comment

1.4

22-MAR-2010

Updated the Workaround/Solution section.

1.3

08-JUN-2009

Updated with a new DDTS to address the failure symptom, and solution.

1.2

07-JUN-2007

Updated 12.4 version for NPE-G1 and 7301 in Workaround/Solution section.

1.1

06-JUN-2007

Added a note to the Problem Symptoms section. Removed all the older DDTS versions shown in the DDTS section and added two new DDTS entries. Changed the software versions in the Workaround/Solution section.

1.0

01-JUL-2005

Initial Public Release

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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