Factory default config for cisco 871w router

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Jan 26th, 2008
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I blew away the factory config that came with my 871w router. now i can not use my sdm disk because it is looking for the ip scheme. can anyone please provide this config so i can start using my router?

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ebreniz Thu, 01/31/2008 - 12:23
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For the fresh configuration of the router follow the below steps:

Sample procedure is as follows:

Router#config t

Router(config)#config-reg 0x2142


Router#show version (check the last line of the output)


When the router reloads, please type this command:

Router#write memory

Router#config t

Router(config)#config-reg 0x2102



At this moment, your router is at Factory default and ready to set any configuration.

Or another way is:

Router#write erase


Router#erase nvram:

paolo bevilacqua Thu, 01/31/2008 - 15:13
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On the 8xx, two more ways:

copy flash:c871-default-sdm.cfg startup-config


(I made up the exact flash filename, do dir and you will see it)

or press the reset button just after turning on.


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