New IP for 1800 Router running VPN

[mtnvictory69]

I have an existing 1800 router that is using NAT and VPN to HQ. I now have a new ISP provider and so now i need to chane the Fastethernet1 IP address. I know how to do that but what else do I need to change to make everything continue to work? Thanks

[Karsten Iwen · Accepted solution]

1) Your own IP and routing

2) The NAT rule that references the public IP

3) Your ACL FIREWALL

4) Your two VPN-peers need to change the IP in their config (and the PSK because that was visible in your config)

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[mtnvictory69]

Can you please tell me our show me how I would make these changes? Thanks a lot for you're help. The new Outside IP is 70.58.191.193 and the inside IP is 10.0.1.1

Thanks

Michael

[Karsten Iwen]

Basically you just have to replace your old IP against the new one. Delete the old routes and configure the new as provided by your provider.

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[mtnvictory69]

My next and hopefully last question is how do I remove the line that have the old IP?

Thanks

Michael

[Karsten Iwen]

I just see, that your router is configured for the new IP (70.58.191.193) that you mention above.

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[mtnvictory69]

Its not in this config but I was just asking how would I delete old lines within my new config.

Thanks

Michael

[Karsten Iwen]

Its not in this config but

you don't make it really easy to help you ...

Commands that you don't need/want are removed with a "no" in front of the old command. At least most of the times with some exceptions, and there comes your actual config into play ...

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[mtnvictory69]

The line

ip nat inside source static 10.0.1.234 72.16.188.235

What should the last IP be in this line? I was thinking it should be my 70.58.191.198 gateway correct?

[mtnvictory69]

Here is the new Config for the router which is going out through the CenturyLink Modem that is configured as a bridge.

Thanks a lot for your help!!

Michael

[mtnvictory69]

One more thing please, what command lines do I need to configure the router to use PPPOE and add authentication with an ID and Password. My DSL modem is set to Bridge mode.

Thanks