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2 x 2911 HSEC router 3 ADSL connections each Site ti Site VPN Load Balancing Failover


My senario is as described in Title.

Site A Headquarters. The router is Cisco 2911HSEC with 3 ADSL connections

Site B Remote Office. The router is Cisco 2911HSEC with 3 ADSL connections and 10 Users.

All ADSL connections have static IPs and belong to same ISP.

Need - Site to Site VPN between the routers.

Client requests to load balance the traffic, due to poor ADSL speed and have a failover senarion in case an ADSL line goes down.

Any help will be appreciated.

Cisco Employee

I don't believe you will find

I don't believe you will find a One solution for this. 


An idea would be to have all three ADSLs paired with ADSL on the other side. 

Have 3 VTI (or GRE) tunnels up all the time (VRF-lite anybody?) and advertise routes to the other side with same metric. 

This will cause IOS to load balance natively. 

Potential problem: return path might not be the same as forward path, but it should not matter much for most applications. 

Potential cool thing you can do: All the "magical" things in routing world (Did I head PfR?). FlexVPN on top to make it more flexible. 

Benefit: Rely on IKE to bring down connections which are going down. Little-to-no management once it's up and running.