GRE Tunnel on cisco 831

[changpinlin]

Hi ,

Who can tell me how to config ipsec over GRE tunnel when remote side useing dynamic ip !

Thanks!

[Richard Burts]

Cisco has introduced a feature designed to do exactly what you are asking. You can configure an IPSec VPN over GRE tunnel where the remote has dynamic IP using the feature of Dynamic Multipoint VPN (DMVPN).

The key concept here is that the remote side must initiate the tunnel to the central side. In the message requesting the tunnel the remote indicates what address the central should use as the tunnel destination.

I have configured it in the lab and it worked pretty well. I have not yet used it in a production environment.

This URL should help you get started with this:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0080110ba1.html

HTH

Rick

[changpinlin]

Hi Rick,

I have already know.

Thank you for your help very much!

CP