09-15-2009 09:31 AM
Hello,
I am configuring a Cisco SR 520 for a small business network. I successfully configured it and synched to the ADSL (AT&T) line. I had the network up and was configuring NAT. I was able to successfully connect to the Internet, and then I restarted the router. At this point, it did not autonegotiate a DHCP lease to the PC I was using for configuration.
I am no longer able to connect it at all. I tried restarting the router, but this did not correct the issue. I then restarted the router while holding down the reset button with a paper clip, but this did not seem to restore factory defaults since 192.168.75.1 was still not responding to the config assistant or even ping.. I am not able to get connectivity to the router, so I have no way to configure it any longer.
Is there a way to restore factory defaults, or a way to determine how to reset the SR 520 to start the DHCP service again?
Thanks.
Steve
09-15-2009 09:39 AM
You can find the appropriate default configuration file for your SR520 model here:
https://www.myciscocommunity.com/docs/DOC-5167
Then TFTP it to your flash and copy it to startup-config, then reload.
This is a clean slate....
09-15-2009 09:47 AM
Thanks for the quick reply.
I assume that I will need to use the console port on the SR 520 through a serial jack on a computer.
I had been using the Configuration Assistant, not the CLI port.
Once I make sure I have the correct file in the startup-config directory, will it use this file during a normal boot? Or do I need to hold the reset pin down during the first 5 seconds?
09-15-2009 09:53 AM
Oh even better. I believe CCA allows you to restore the SR520 to factory defaults via the maintenance drawer.
There is a RESET/RESTART GUI in that drawer.
Try that firt by all means!!! CCA 2.1 is the latest CCA:
http://www.cisco.com/go/configassist
If that didnt work, then you would telnet/SSH to the IP address of the SR520 on the data lan and TFTP the default config to the router and do what I said and then just reload the router.
But to avoid all these time consuming steps, try CCA first.....
Steve
09-15-2009 10:02 AM
I am impressed by how quick and accurate the web support is. Kudos to Cisco.
I used the restart feature from the CCA 2.1 maintenance drawer initially, but the router lost communication with the PC.
I am having trouble setting up Hyper terminal. I just read a post that I should use PuTTY instead. I am about to download PuTTY...is this possible that Hyper terminal won't work properly?
09-15-2009 05:57 PM
PuTTY worked fine and I was able to review the existing config file. I ended up copying the factory default by entering each command by hand to get the router boot strapped. It took a while, but worked. Thanks.
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