I'm in the process of setting up redundant links from main office (hub) to two branch offices (stubs).
I'm in the planning stage and would like to have a very good plan before I start doing anything with the objective that I have redundant links and no fail over as long as at least one ISP is still up. The only time I expect downtime is if both ISPs go down or some other issues like both links go down.
I want to set up vpn tunnels to the spoke routers. I'll use ISP1 as primary and ISP2 as backup.
The idea is that if a tunnel fails because link to ISP1 fails, the backup tunnel should be build and come alive and downtime is minimal.
On the spoke router, there is only one endpoint however on the hub are the two endpoints for both ISPs which means I have 2 public ip addresses.
I've heard of vti, dmvpn, hsrp, object tracking, dynamic routing protocols and a bit overwhelm with the information and want some directions to get it right.
Suggestions, directions and help much appreciated.