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Using vpn over adsl as fault tolerance for existing site link. Cisco 1841.

I have an interesting problem I hope someone can advise on.

Two sites (,  Currently linked over IP by a third parties trunk link, using an ethernet port on each of the cisco 1841s. Using standard private routing, no nat/vpn etc.

The 1841's also have adsl wics supplying internet access to the two sites.

The trunk link occasionally goes down. I would like to configure a VPN connection between the adsl wics to take over automatically should any point on trunk link go down.

Is this possible?

1 Solution
You will want to configure a DMVPN You can read about it here
This will allow sharring of the bandwith as well as failover for your link. It is very easy to set up with the Cisco SDM. about 2 minutes a side.
heathcote123Author Commented:
Cool I'll give it a try - is that included as standard on the k9 advanced security image?
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