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UNHANDLED ROMMON EXCEPTION on WS-C4948-10GE

weichenb2
Beginner
Beginner

Hello,

While attempting to load a new IOS (cat4500-entservicesk9-mz.150-2.SG2) onto a 4948. I put new IOS on the 4948, deleted the old IOS, and reloaded it; ensuring that IOS was to be loaded from flash. That is went I noticed the UNHANDLED EXCEPTION and the 4948 continually reboots. I, then, changed it to have it boot from TFTP (same IOS) and same problem. Does any have an idea what might be going on?

1 Accepted Solution

Accepted Solutions

Hi,

Your ROMMON version is 12.2(31r)SGA, which is affected by DDTS CSCsw91043. This Bug is related to Rommon Code and you are required to upgrade it to 12.2(31r)SGA4.

Please find the link below for instructions:

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst4500/release/note/OL_9592.html#wp305422

New ROMMON file can be found at:

http://www.cisco.com/cisco/software/release.html?mdfid=279636820&release=12.2(31r)SGA4&relind=AVAILABLE&flowid=3589&softwareid=280805687&rellifecycle=&reltype=latest

Note that the above link is for 4948 10 Gig Ethernet switch.

Kind Regards,

Ivan Shirshin

**Please grade this post if you find it useful.

Kind Regards,
Ivan

View solution in original post

9 Replies 9

Arumugam Muthaiah
Cisco Employee
Cisco Employee

Hi,

The switch might end up in a continuous reboot sequence if the boot variable is not set to the correct system image file and proper destination device. For example, the configuration register value of 0x2102 requires that a boot variable is specified by issuing the boot system flash configuration command

  • Issue the show bootvar command to check the current boot variable
  • Ensure that you specify the correct image with below boot sequence.

     Example:

     #boot system flash bootflash:cat4500e-ipbasek9-mz.122-53.SG2.bin

  • Save the config
  • Check the boot variable again to make sure it is set properly so that the switch boots up the correct system file on the next reboot. Issue the show bootvar command in order to do this

Regards,

Aru

*** Please rate if the post is useful ***

Regards, Aru *** Please rate if the post useful ***

The 4948 is in ROMMON now, so I do not this those commands will work.

Hi,

Sorry for the late response. Please see below detail to recover from Rommon mode,

Issue the dir bootflash: command to list the files present in the bootflash, or issue the dir slot0: command to list the files present in the Compact Flash device.

Example:

rommon 1 >dir bootflash:

   File size                  Checksum      File name
   --------------------------------------------------
   6516904 bytes (0x6370a8)   0x7b7edb21    cat4000-is-mz.121-11b.EW

   Total space = 61341696 bytes, Available = 54824664 bytes

rommon 2 >dir slot0:

   File size                  Checksum      File name
   --------------------------------------------------
   6516904 bytes (0x6370a8)   0x7b7edb21    cat4000-is-mz.121-11b.EW

   Total space = 128057344 bytes, Available = 121540312 bytes

Note:
The reason the switch reboots continuously is because the system image file name specified does not exist, but there is a valid file in the bootflash and slot0:. Also, the system image file name specified is case sensitive. If it is not specified correctly, it causes a continuous reboot


If the required system image file present in the bootflash:, you can issue the boot bootflash:<filename> command to boot the switch. Issue the boot slot0:<filename> command if you want to load the system from the file present in slot0:

Example:
rommon 2 >boot bootflash:cat4000-is-mz.121-11b.EW

Once the switch restore, Plesae check the previous steps which i shared already to avoid continuous reload

Refer:

http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a0080094ecf.shtml

Regards,

Aru

*** Please rate if the post is useful ***

Regards, Aru *** Please rate if the post useful ***

I entered the follwoing command.

boot bootflash:cat4500-entservicesk9-mz.150-2.SG2.bin

As you can see the file is in the flash.

rommon 2 >dir bootflash:

   File size                  Checksum      File name

   --------------------------------------------------

  19459812 bytes (0x128eee4)  0x2155b5b6    cat4500-entservicesk9-mz.150-2.SG2.bin

   Total space = 61341696 bytes, Available = 41881756 bytes

While rebooting, I see the following statement in the output, but continue to receive "UNHANDLED ROMMON EXCEPTION at PC=0453ab5c".

******** The system will autoboot now ********

config-register = 0xa441

Autobooting using the first file from bootflash.....

Hi,

I have noticed that you have config-register set to a value 0xa441 (is it an error or a leftover of previous troubleshooting? I did not see such value being used before). Could you try setting it to default 0x2102, please? Command is "confreg 0x2102" in ROMMON or "configi-reg 0x2102" in IOS config mode.

If it still fails, please share the console logs showing complete boot sequence from boot start to the crash following by reset to ROMMON.

Kind Regards,
Ivan Shirshin

**Please grade this post if you find it useful.

Kind Regards,
Ivan

rommon 2 >set

PS1=rommon ! >

RommonVer=12.2(31r)SGA

CV=bootflash:cat4000-i5s-mz.122-25.EWA10.bin

DiagMonitorAction=Normal

ConsecPostPassedCnt=14

IpAddr=192.168.1.2

Netmask=255.255.255.0

Broadcast=192.168.1.255

Gateway=192.168.1.10

TftpServer=192.168.1.10

ConfigReg=0xa002

BootedFileName=bootflash:cat4000-ios-promupgrade-122_25r_EWA

rommon 3 >confreg 0x2102

usage: confreg

Here my attempt to use boot bootflash: command.

rommon 5 >boot bootflash:cat4500-entservicesk9-mz.150-2.SG2.bin

Rommon reg: 0x00004180

############

k2diags version 5.7

prod: WS-C4948-10GE  part: 73-9344-09  serial: FOX112905U3

Power-on-self-test for Module 1:  WS-C4948-10GE

Port/Test Status: (. = Pass, F = Fail, U = Untested)

Cpu Subsystem Tests ...

seeprom: . temperature_sensor: .

Port Traffic: L2 Serdes Loopback ...

0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .

12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .

24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: . 32: . 33: . 34: . 35: .

36: . 37: . 38: . 39: . 40: . 41: . 42: . 43: . 44: . 45: . 46: . 47: .

62: . 63: .

Port Traffic: L2 Asic Loopback ...

UNHANDLED ROMMON EXCEPTION at PC=0453ab5c

Vector=00000100 MSR=02029230 LR=0453ab24

MCSR=00000000

CISR0=00000000 CISR1=40000000

DDR_ERR_DETECT=00000000

**********************************************************

*                                                        *

* Welcome to Rom Monitor for WS-C4948-10GE System.       *

* Copyright (c) 2003-2006 by Cisco Systems, Inc.         *

* All rights reserved.                                   *

*                                                        *

**********************************************************

Rom Monitor Program Version 12.2(31r)SGA

Supervisor: WS-C4948-10GE  Chassis: WS-C4948

Hardware Revisions - Board: 8.5 CPLD Gill: 20

MAC Address  : 00-1d-45-66-bb-ff

IP Address   : 192.168.1.2

Netmask      : 255.255.255.0

Gateway      : 192.168.1.10

TftpServer   : 192.168.1.10

***** The system will autoboot in 5 seconds *****

Type control-C to prevent autobooting.

. . .

Autoboot cancelled......... please wait!!!

Hi,

Your ROMMON version is 12.2(31r)SGA, which is affected by DDTS CSCsw91043. This Bug is related to Rommon Code and you are required to upgrade it to 12.2(31r)SGA4.

Please find the link below for instructions:

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst4500/release/note/OL_9592.html#wp305422

New ROMMON file can be found at:

http://www.cisco.com/cisco/software/release.html?mdfid=279636820&release=12.2(31r)SGA4&relind=AVAILABLE&flowid=3589&softwareid=280805687&rellifecycle=&reltype=latest

Note that the above link is for 4948 10 Gig Ethernet switch.

Kind Regards,

Ivan Shirshin

**Please grade this post if you find it useful.

Kind Regards,
Ivan

Kibimbwa.r
Beginner
Beginner

Hello Team,

Please, anybody can help me ?

I have the same issue, my WS-C4948-10GE can load ios normaly just rommon mode.

rommon 5 >set
 PS1=rommon ! >
 RommonVer=12.2(31r)SGA
 CV=bootflash:cat4000-i5s-mz.122-25.EWA7.bin
 ConfigReg=0x2101
 DiagMonitorAction=Normal
 ConsecPostPassedCnt=62
 BOOT=
 IpAddr=172.26.10.134
 Netmask=255.255.255.192
 Broadcast=172.26.10.191
 Gateway=172.26.10.129
 TftpServer=172.26.10.167
 BootedFileName=bootflash:cat4500-entservicesk9-mz.150-2.SG11.bin
rommon 6 >

I would like to know, how I can upgrade cat4500-ios-promupgrade-122_31r_SGA7 on ROMMON MODE because he can work with this IOS cat4500-entservicesk9-mz.150-2.SG11.bin

I'm in ROMMON MODE now !!!

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