Solved

Cisco 877 Router

Posted on 2011-09-07
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Last Modified: 2012-05-12
I am having trouble with my 877 dsl router where when I boot it up I get to the console
         --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]

unless I select either yes or no the CD light on front of the router keeps flashing and I can not do anything with the router. If I select no and set some values like hostname and reload the router it dosnt keep any of the saved configurations. My IOS version is c870-advipservicesk9-mz.124-15.T4 dose anyone have anyidea what might be going on
thanks
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Question by:nchannon
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by:rochey2009
rochey2009 earned 100 total points
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Hi,

It's either lost its configuration or it's been told to bypass it.

Have a look at the configuration register  with the show version command

At the bottom of the output, it should say:

Configuration register is 0x2102
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jmeggers earned 350 total points
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Say "no" to the initial configuration dialog, and at the prompt do a "show version" as mentioned above.  If it says anything other than 0x2102, look for a startup config using "show start".  If the startup config is there, do a "copy start run" to bring that configuration into the running configuration.  Then go into config mode, change the config register to 0x2102, and then save the config ("copy run start").  You MUST bring the startup config over to be the running config, otherwise when you change the config register and save that, you will overwrite the existing startup config with essentially a blank config.

If the config register is set to 0x2102 and there's no startup config, then you're on your own.  Hopefully you have an archived copy someplace.
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by:nchannon
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Hi thanks that did the job but im still a little confused as when I set the command config-register 0x2102
and reloaded all worked fine but when I check the show version my configuration register is now 0x3922 and not 0x2102 yet now the router is booting up fine why is this
Thanks
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by:woepwobin
woepwobin earned 50 total points
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The console baudrate is set to 115200 instead of 9600, that's why the config register is 0x3922 instead of 0x2102. See http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml#config-reg-meaning.
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Author Closing Comment

by:nchannon
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Thanks very much for your help my router is back up and running
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