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

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Updated:October 20, 2017
Document ID:FN61703

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Notice

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.

Revision History

Revision Publish Date Comments
1.0
22-Mar-10
Initial Release
10.0
20-Oct-17
Migration to new field notice system

Products Affected

Affected Product ID Comments
7300-NPE-G100
7304-NPE-G100
7304-NPE-G100/2
7304-NPE-G100/2=
7304-NPE-G100=
CISCO7301
CISCO7301-2AC=
CISCO7301-2DC48=
CISCO7301-BB
CISCO7301-BB-8K
CISCO7301/2+VPNK9
CISCO7301/2VPNK9
CISCO7301=
NPE-G1
NPE-G1-BUN
NPE-G1=
UBR7200-NPE-G1
UBR7200-NPE-G1-BUN
UBR7200-NPE-G1=
UBR7246VXR-NPE-G1=

Defect Information

Defect ID Headline
CSCsj78920 TITLE: 7200/ubr7200: Router Hang / Watchdog Hard Reset
CSCir01277 TITLE: 7304 NPE-G100 Router reboot due to watch dog reset

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 4 ms. The software responds to the interrupts and resets the watchdog. If the software fails to respond and resets the watchdog within 32 ms, the watchdog will first issue a Non-Maskable Interrupt (NMI) to the CPU. If the CPU fails to respond to the NMI a further 42ms, 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 Symptom

The system may reload during normal operation.  No crash information will be generated by the router.  Below is a sample IOS CLI command output 'show version' from a failed router.

 

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%3Cbr%3E 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%3Cbr%3E http://www.cisco.com/tac%3Cbr%3E%3C/a%3E 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

 

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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