HWIC-3G-GSM

[support]

Hello,

I want to configure a router 1841 with a HWIC-3G-GSM to do a backup of the primaire line. This backup 3G will be used with a ipec tunnel to an other router 1841. The ip address of the 3G is a dynamic ip address, there is a system like dynamic Dns to make a Ipsec Tunnel with a dynamic ip address?

Thanks and regards

[paolo bevilacqua · Accepted solution]

Yes. You to apply both of these configs:

http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html

and

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrlres.html

Hope this helps, please rate post if it does!

[support]

Thanks.

[tdorduncu]

You can also setup aggressive mode ipsec tunnels.

http://kkocaer.wordpress.com/2008/05/17/3g-cisco-hwic-with-wan-backup/