It all started a while ago with a log message found on the hub of a large DMVPN/IPSEC deployment over mobile Internet connections. Given the increasing number of deployments that use the Internet as a cheaper, faster WAN for either primary or backup, I thought it would be useful to document the problems and the two main solutions.

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In the past couple of years I've had quite a bit of exposure to customers with large WANs in various industries (many non-IT centric) - with xDSL and DMVPN/FlexVPN playing a big role alongside simpler things like fibre based L3VPN and Internet access.

Depending on customer requirements, WAN solutions can range from simple to CCIE lab worthy (and I ...

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