Cisco help needed!!!

I have a bit of a problem. I was upgrading my cisco IOS the other night to fix a problem with my mail client not authenticating properly... and to just get the newest IOS.

I DO have console access and it is my router... The router is a Cisco 806 broadband router.

After uploading my new IOS, I reloaded it like you normally would... this is what I get...

Quote:

System Bootstrap, Version 12.2(4r)XM3, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 2002 by cisco Systems, Inc.
C800/SOHO series (Board ID: 17-100) platform with 32768 Kbytes of main memory

program load complete, entry point: 0x80013000, size: 0x4c589c

Error : compressed image checksum is incorrect 0x7CAF0C71
þ Expected a checksum of 0x7CAF0C9E
*** System received a Software forced crash ***
signal= 0x17, code= 0x5, context= 0x0
PC = 0xbaddaddd, Vector = 0xbaddaddd, SP = 0xbaddaddd

I tried to upgrade it to c806-o3sy6-mz.123-2.T.bin from c806-o3sy6-mz.122-4.YH.bin
Everytime I reboot it... I get that message so I can't get to CLI to erase flash to load a different IOS image... :(

Here is what I have tired so far...

Using the process here I have gotten into ROMMON to change the registers...

Quote:

Press Break on the terminal keyboard within 60 seconds of the power-up to put the router into ROMMON.

If the break sequence doesn't work, see Possible Key Combinations for Break Sequence During Password Recovery for other key combinations.

Type confreg 0x2142 at the rommon 1> prompt to boot from Flash without loading the configuration.

Type reset at the rommon 2> prompt.

The router reboots but ignores its saved configuration.

Since I can get to ROMMON I can change the registers...

Quote:

Configuration Registers

The global configuration command - config-register is used to modify the behaviour of the router. Weather or not it boots from saved configuration. Weather or not it boots from the flash or the boot-proms.

The following page is an excellent reference for configuration registers http://www.cisco.com/univercd/cc/td/...ig/vconfig.htm

In summary these Boot Registers are quite handy:

The value range is from 0x0 to 0xFFFF.
0x2102 is the factory-default configuration register value.
0x2142 boots from flash without using NVRAM contents good for password recovery.
0x2101 boots from boot prom image not flash, good for upgrading image on flash.
0x2141 boots from boot prom and ignores NVRAM contents.
0x141, which disables the Break key, ignores the NVRAM configuration, and
boots the default system image from ROM.

Source

I have tried ALL of these registers.. and I can't get to CLI.
Everything I have tried still results in the message that is in my first quote.

I have just seen the boot helper image.. and am going to mess with that for a bit.

Quote:

Configuring the Boot Field
The lowest four bits of the processor configuration register (bits 3, 2, 1, and 0) form the boot field. (See Table D-2.)

Table D-2 Explanation of Boot Field (Configuration Register Bits 00-03)

Boot Field Meaning
00
Stays at the system bootstrap prompt (ROM monitor) on a reload or power cycle

01
Boots the boot helper image as a system image

02-F
Specifies a default netboot filename

Enables default booting from system Flash memory

Enables boot system commands that override the default netboot filename1

1Values of the boot field are 2-15 in the form cisco<n>-processor_name, where 2 < n < 15.

The boot field specifies a number in binary. If you set the boot field value to 0, you must have console port access to boot the operating system manually. Boot the operating system manually by entering the b command at the bootstrap prompt as follows:

> b [tftp] flash filename
Definitions of the various command options follow:

b—Boots the default system software from ROM
b flash—Boots the first file in Flash memory
b filename [host]—Boots over the network using TFTP
b flash [filename]—Boots the file (filename) from Flash memory
For more information about the b [tftp] flash filename command, see the appropriate Cisco IOS software publications.

If you set the boot field value to a value of 2 through F, and there is a valid system boot command stored in the configuration file, the router boots the system software as directed by that value. (See Table D-3.) If you set the boot field to any other bit pattern, the router uses the resulting number to form a default boot filename for booting from a network (TFTP) server.

If there are no boot commands in the configuration file, the router attempts to boot the first file in system Flash memory. If no file is found in system Flash memory, the router attempts to netboot a default file whose name is derived from the value of the boot field (for example: cisco2-4500). If the attempt to boot from a network (TFTP) server fails, the boot helper image in boot Flash will boot up.

If boot commands are in the configuration file, the router software processes each boot command in sequence until the process is successful or the end of the list is reached. If the end of the list is reached without a file being successfully booted, the router will retry the netboot commands up to six times unless the boot default ROM software if netboot fails bit (bit 13 of the virtual configuration register) is set. If bit 13 is set, the system boots the boot helper image found in boot Flash memory without any retries.

In the following example, the virtual configuration register is set to boot the router automatically from Flash memory and to ignore Break at the next reboot of the router

Mybe I'm missing something here... but how do I change the boot register to get the boot helper image instead of the sysem image stored in flash?! Will I be able to delete the other image in flash from the boot helper?
http://www.cisco.com/univercd/cc/td/...ig/vconfig.htm
Can Someone help me understand?

When I change confreg 00 or 0x00 or what? will that leave me at bootstrap where I can try to load a system image from a tftp server? I have other system images I know that works... I just need to load it to flash...

Quote:

Configuration Register
The virtual configuration register is in nonvolatile RAM (NVRAM) and has the same functionality as other Cisco routers. You can view or modify the virtual configuration register from either the ROM monitor or the operating system software. Within ROM monitor, you can change the configuration register by entering the register value in hexadecimal format, or by allowing the ROM monitor to prompt you for the setting of each bit.

Changing the Configuration Register Manually
To change the virtual configuration register from the ROM monitor manually, enter the command confreg followed by the new value of the register in hexadecimal, as shown in the following example:

rommon 1 > confreg 0x2101

You must reset or power cycle for new config to take effect
rommon 2 >

The value is always interpreted as hexadecimal. The new virtual configuration register value is written into NVRAM but does not take effect until you reset or reboot the router.

Changing the Configuration Register Using Prompts
Entering confreg without an argument displays the contents of the virtual configuration register and a prompt to alter the contents by describing the meaning of each bit.

In either case, the new virtual configuration register value is written into NVRAM but does not take effect until you reset or reboot the router.

The following display shows an example of entering the confreg command:

rommon 7> confreg

Configuration Summary
enabled are:
console baud: 9600
boot: the ROM Monitor

do you wish to change the configuration? y/n [n]: y
enable "diagnostic mode"? y/n [n]: y
enable "use net in IP bcast address"? y/n [n]:
enable "load rom after netboot fails"? y/n [n]:
enable "use all zero broadcast"? y/n [n]:
enable "break/abort has effect"? y/n [n]:
enable "ignore system config info"? y/n [n]:
change console baud rate? y/n [n]: y
enter rate: 0 = 9600, 1 = 4800, 2 = 1200, 3 = 2400 [0]: 0
change the boot characteristics? y/n [n]: y
enter to boot:
0 = ROM Monitor
1 = the boot helper image
2-15 = boot system
[0]: 0

Configuration Summary
enabled are:
diagnostic mode
console baud: 9600
boot: the ROM Monitor

do you wish to change the configuration? y/n [n]:

You must reset or power cycle for new config to take effect

Source

Then I'd need to xfer via console since I won't have any ip set to my LAN ethernet interface?

I called cisco support and they told me that I'd have to open a TAC in which I'd need a contract (which I don't have)... etc. etc.

Is there any way I can resolve my problem? I'm not a cisco newbie... I just don't use them all that much and they don't teach us that kind of stuff in class... just the basic config... not how to bring one back to life... I have already messed it all up and I'm a little nervous of changing too much stuff and I won't be able to do anything at all!!! :(

I'll be on vacation thurs night (7/31) through tues night (8/5) so if I don't reply between that time... its because I don't have access to a PC... :(

Thank you Thank you Thank you Thank you Thank you to anyone who does reply.

I've played around abit with the 803's. These shouldn't be all that different.

When it boots keep hitting ^C (control-C) until you get the boot# prompt. After that you should be able to use the set command to set an ip addres/subnet mask for your ethernet interface. Once that's done you can use the upload command to tftp a new IOS into ram. Use save to save it to nvram. On the boot prompt you can use the help command to see which commands are available.

Make sure the MD5 checksum is correct before trying to load it into your cisco. The ios you've downloaded probably got corrupted somewhere. If you FTP'd it make sure it's in BIN mode before transfering!

SirDice:

Thank you for your reply. I was not aware that ^c would get me to a boot prompt... I had thought I had tired that, but I'll try it again. It locks up within 60 seconds and so far the only thing I've been able to do is to get it to ROMMON. (using break before it locks up)

Unfortunately I have to work today. :( So, I won't have time to mess with it until I get off or worse after I get back from vacation. I will def take a quick 20 min to try out your suggestinon.

Even though the ^c might get me to a boot prompt, I'm still a little confused as to how to change the boot reg. to go to the boot-helper image instead of trying to load an image from flash (which is causing me the errors). I've been a bit pressed for time, so I haven't gotten to read all that I would have liked to. I'll bring a cisco book with me on my camping/road trip... ;)

Can anyone else confirm what SirDice suggested? Anyone else have any other suggestions? Thanks a bunch!

Try these 2 sites, i dunno if they're gonna help tho: http://www.cisco.com/warp/public/122...ubleshoot.html
http://www.ciscodata.com/troubleshoo...er-crashes.asp

Nice info Cybr1d but these all assume you can still boot your IOS. It's more about finding out why your router/switch crashed (and recovered after a reboot).

Phishpreek's problem is that his IOS doesn't even load properly and crashes during the attempt to start it. This is probably due to a corrupt IOS image.

Back from vacation and time to start working on this problem again.

Quote:

When it boots keep hitting ^C (control-C) until you get the boot# prompt.

I have not been able to get it to go to the boot prompt... the most I can get is to ROMMON with the ^break combo....

Any ideas?

EDIT:

Ok! I got it! wow! That was a heck of a learning experience.... or a headache... whichever you prefer.

Here is how I did it...

I wet into rommon and I saw a tftpdnld command... which you can use for disaster recovery. I set my rommon parameters and then I was able to DL the IOS again!

Go this URL on what u need to do,,Step by step instructions..

Ur error message when upgraded IOS was most likely image was not
complete,(dropped packets somewhere)...

Only way is to reboot from Rom and copy new image from scratch

Good Luck,,,

Sorry "brain fart" here is URL: http://www.cisco.com/en/US/products/...800942bc.shtml

I appreciate you trying to help, but I solved my problem. (at least for now)

Here is how to load a IOS from the ROMMON. That is what I had to do. Just be sure to set the ROMMON environment settings before trying to xfer the IOS.

Its pretty cool learning new OSs. Especially after just taking classes on it and not knowing how to solve you're problem. Even my teacher wasn't sure exactly how to fix it.... so much for the troubleshooting chapters in the books.... :(

cant load IOS from rommon

I have found this old post and I am having a similar problem. I was trying to upgared the IOS in my Cisco SOHO 91. The .bin file was corrupt so it errored out and now will only boot to ROMMON. I have followed the instructions above and set the IP, SUB Net, Gateway, and TFTP Server. Everything is correct. It will not load. When I type tftpdnld it says... missing or illiegal Ip address for the variable ip ddress. I have also tried using Xmodem and that just times out.

Any help is appreciated

Bill

I don't have access to a ROMMON console at the moment... so I'll have to work from memory.

Actually... I'll just use the links I've posted:

Quote:

rommon 16 > IP_ADDRESS=171.68.171.0
rommon 17 > IP_SUBNET_MASK=255.255.254.0
rommon 18 > DEFAULT_GATEWAY=171.68.170.3
rommon 19 > TFTP_SERVER=171.69.1.129
rommon 20 > TFTP_FILE=c2600-is-mz.113-2.0.3.Q
rommon 21 > tftpdnld

You are setting all this info? Is your tftp server and router on the same subnet?
Is your tftp server setup to download files from it? I beleive mine was set only to receive, not send at first.
Are you putting the new IOS image file in the root of the tftp server? I know it isn't necessary... but helps.
Are you sure you have the right IOS for your router?
Does your router have enough resources to load this new image?

Can you copy and paste your session if probems persist so I can see everything that happened?
You can PM it to me if you'd like.

Thanks

Depends on the bootloader version how this goes. Use the '?' and see what commands that version supports. See if you have a 'set' or 'env' you may need to use 'set' to set the IP and stuff.

-Maestr0

Ok here is the whole process and what i get. I cant figure out why it keeps saying illegal ip address. The laptop i'm using is set to 192.168.1.5 I know this ios will fit and work with this router because we have 184 of them in use elsewhere. Boot loader is 12.2

(I am a support tech for Internet cafe's in Iraq)

rommon 7 > tftpdnld ?

Missing or illegal ip address for variable IP_ADDRESS
Illegal IP address.

usage: tftpdnld [-ur]
Use this command for disaster recovery only to recover an image via TFTP.
Monitor variables are used to set up parameters for the transfer.
(Syntax: "VARIABLE_NAME=value" and use "set" to show current variables.)
"ctrl-c" or "break" stops the transfer before flash erase begins.

The following variables are REQUIRED to be set for
IP_ADDRESS: The IP address for this unit
IP_SUBNET_MASK: The subnet mask for this unit
DEFAULT_GATEWAY: The default gateway for this unit
TFTP_SERVER: The IP address of the server to fetch from
TFTP_FILE: The filename to fetch

The following variables are OPTIONAL:
TFTP_VERBOSE: Print setting. 0=quiet, 1=progress(default), 2=verbose
TFTP_RETRY_COUNT: Retry count for ARP and TFTP (default=7)
TFTP_TIMEOUT: Overall timeout of operation i
TFTP_CHECKSUM: Perform checksum test on image, 0=no, 1=yes (default=1)

Command line options:
-r: do not write flash, load to DRAM only and launch image
-u: upgrade the rommon, system will reboot once upgrade is complete
rommon 8 > set
PS1=rommon ! >
BSI=0
RET_2_RUTC=0
RET_2_RTS=
ip_address=192.168.1.2
ip_subnet_mask=255.255.255.0
default_gateway=192.168.1.1
tftp_server=192.168.1.5
tftp_file=ios.bin
?=1
rommon 9 > tftpdnld

Missing or illegal ip address for variable IP_ADDRESS
Illegal IP address.

usage: tftpdnld [-ur]
Use this command for disaster recovery only to recover an image via TFTP.
Monitor variables are used to set up parameters for the transfer.
(Syntax: "VARIABLE_NAME=value" and use "set" to show current variables.)
"ctrl-c" or "break" stops the transfer before flash erase begins.

The following variables are REQUIRED to be set for tftpdnld:
IP_ADDRESS: The IP address for this unit
IP_SUBNET_MASK: The subnet mask for this unit
DEFAULT_GATEWAY: The default gateway for this unit
TFTP_SERVER: The IP address of the server to fetch from
TFTP_FILE: The filename to fetch

The following variables are OPTIONAL:
TFTP_VERBOSE: Print setting. 0=quiet, 1=progress(default), 2=verbose
TFTP_RETRY_COUNT: Retry count for ARP and TFTP (default=7)
TFTP_TIMEOUT: Overall timeout of operation in seconds (default=7200)
TFTP_CHECKSUM: Perform checksum test on image, 0=no, 1=yes (default=1)

Command line options:
-r: do not write flash, load to DRAM only and launch image
-u: upgrade the rommon, system will reboot once upgrade is complete
rommon 10 >

I don't quite recall... but I think I had a problem like that.

Try unsetting the IP and then resetting the IP.

It should be something like

unset IP_ADDRESS
(I don't think you need to type out the actual ip address....)

then set it again.

IP_ADDRESS=192.168.1.2

Again... I'm going from memory, so excuse any syntax errors.

Also... I've had some problems that seem like everything should work but the problem is actually ROMMON itself! See the following thread for a good example.

http://www.antionline.com/showthread...hreadid=267703

I believe ROMMON variables are CASE sensitive. set IP_ADDRESS, and not ip_address.

-Maestr0

So?????? How do you reload Rommon? This thing is really pissing me off. We do not have any more spare routers so i am trying to get this one working in case one crashes.

Thanks

I teied unsetting and resetting and it did not help. Anything else?

Just a suggestion have you checked the integrity of the c806-o3sy6-mz.123-2.T.bin file.

Quote:

Originally posted here by warl0ck7
Just a suggestion have you checked the integrity of the c806-o3sy6-mz.123-2.T.bin file.

I originally started this thread because of a problem that I had.

bschuteker posted to this thread with a similar problem, but unrelated to my original problem.
My problem has since been resolved.

bschuteker: the way you upgrade your ROMMON is similar to the way you load your IOS.

to upgrade ROMMON with tftpdnld, you use the -u switch.
You will need the proper ROMMON image from Cisco's site.
(provided that there even is an updated one)

However, now that I think about it... if you're having problems getting it to recognize the ip address that you've set... you're not going to be able to use tftp

You can also update the ROMMON file using xmodem
similar syntax

xmodem -u

You said before that you tried using xmodem, but it times out?

This link may be of some use for you:
http://www.cisco.com/en/US/products/...080118d19.html

Are you sure that you're connecting to the console with the correct parameters?

Quote:

The console port is configured as a data communications equipment (DCE) device. The default parameters for the console port are as follows:

•9600 baud

•8 data bits

•No parity

•One stop bit

http://www.cisco.com/en/US/products/...08010e5b3.html

From searching a bit... it looks like quite a few people have had problems with a corrupt rommon for the soho 91 and the 831 (the one I had problems with).

Here is where i am at today
Yes HT is configured correctly otherwise i wouldn't be able to access the router at all. The Ios ver that we are using is soho91-k9oy6-mz.123-11.T.bin I know this is a good file because I have installed it in another router recently. I have searched cisco.com for an updated ROMmon and can find no such thing. I am willing to try to install the current IOS 12.3 (8)ya, but as i am a lowly tech and do not have access to a service contract I can not DL it from Cisco. I do have access to a working router. Is there something I can do using it to recover my bad one?

Thanks again for the help

HOLY CRAP!!!!! I got it! It was the case. I unset all lower case and set the params in uppercase and that did it.

Thanks so much for your help.

Bill

Quote:

HOLY CRAP!!!!! I got it!

*foxy LOVES a happy ending * :sniffle: :softy wuss: