There are 2 sites A and B. Both sites have its own firewall. Sites A and B are connected via a 100Mbps wireless Radio Link.
If the radio link is down, there is no redundancy at the current setup.
Proposed 2x 710 on each site and on HA config as well.
2x new ADSL links on each site will be used.
Speedfusion will be used between site A and B.
The 2x new ADSL links will only be used when the primary Radio link fails.
They also want to use their existing firewalls at each site.
I am thinking of including all 3x links (2x new adsl and existing radio link) but assign WAN Connection Priority as 1 on radio link and 2 on both 2x new adsl.
Now I am not sure which is best to do, drop-in mode HA or NAT HA in this scenario?
If I used drop-in mode, can I use the WAN interface where private radio link is connnected? The reason I am thinking like this because I know when I use one of the ADSL links, we would require additional public addresses from the ISP to accomplish this drop-in mode???
Is HA NAT mode ok in this case as there is firewall behind the 710s???