1821 Config Problem

Answered Question
Jun 8th, 2007

I have a 1821 SDM. I recently changed ISP's and tried to reconfigure the router with my new set of IP's. No when ever I reboot the router, it resets back to the old config. I have tried everything I know. Anyone have any ideas?

I have this problem too.
0 votes
Correct Answer by spremkumar about 9 years 7 months ago

Hi

Do make sure that your config register value is set to 0X2102.

I feel your config register value is set to 0X2142 which will result in what you are experincing at present.

You can verify the same using show version command...

Once you are sure that its set as 0X2142 do change it using config-register 0X2102 and save the config.

After saving the config do check with show version command for proper updation try with a reset and check for the new register value..

regds

Correct Answer by rajinikanth about 9 years 7 months ago

Did you saved your running-config to startup-config

HTH

Raj

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Correct Answer
rajinikanth Fri, 06/08/2007 - 20:33

Did you saved your running-config to startup-config

HTH

Raj

Correct Answer
spremkumar Sat, 06/09/2007 - 01:59

Hi

Do make sure that your config register value is set to 0X2102.

I feel your config register value is set to 0X2142 which will result in what you are experincing at present.

You can verify the same using show version command...

Once you are sure that its set as 0X2142 do change it using config-register 0X2102 and save the config.

After saving the config do check with show version command for proper updation try with a reset and check for the new register value..

regds

Richard Burts Sun, 06/10/2007 - 16:29

Edwin

If the config register were 0x2142 then it would go to no config when the router reboots. And in the original post Bobby says that it goes back to the old config - not to no config. So I do not believe that it is a problem with the config register.

I have not attempted this kind of change using SDM but I have done it many times successfully from the command line interface. So my advice to Bobby is to go to the command line interface and change the interface addresses from the command line.

HTH

Rick

foxbatreco Sun, 06/10/2007 - 17:35

Hii..please use the CLI to reconfig ur router with the new set of IP's and also have a chk on the config reg value.

Pls rate the post.

bcannon1133 Sun, 06/10/2007 - 20:57

That is what it was. I checked the config and it was set to 0x2142. Changed it, made my changes, power cycled, and bam, now it works...cant believe I over looked something like that. Thanks for the help.

bobbycannon Tue, 06/19/2007 - 09:41

Ok, well now it gets better. It worked for a week. I must have rebooted this thing 50 times to make sure. All of a sudden, I power it down to install a new APC, now it returns to the old config. Checked the version and it is still at 0X2102. I swear, I have nothing but issues from this thing. Anymore ideas??

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