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New Member

Basic question - how to save startup config on Cisco 1721 router

I have completed configuration of Cisco 1721 router however unable to save the configuration. Lose configuration following reload or power cycle. Documentation indicates that 'wr mem' and 'copy run start' should store settings. I know I am missing a basic command. Any help would be greatly appreciated. Thx!

3 REPLIES
New Member

Re: Basic question - how to save startup config on Cisco 1721 ro

You may need to change your configuration register to something like 0x2102

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml

should give you a good start.

Re: Basic question - how to save startup config on Cisco 1721 ro

Its very much possible that your configuration register is messed up. This is a software configuration register used by the router to change boot behaviour, baud rate of console port etc along with many other parameters. By default a router should have 0x2102 as config register. To find the current value of config register in your system, you should execute a sh version and look at the very last line of the output. If its not 0x2102, you need to change it to 0x2102.

Router(config)#config-register 0x2102

Router#wr mem

Router#reload

That should help!

New Member

Re: Basic question - how to save startup config on Cisco 1721 ro

Thanks...I will give that a try. Config register is currently 0x2142...different than the 0x2102 value.

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