[mcnallym]

ISP Redundancy is seperate to VPN and VPN link selection is only tied to the ISP Redundancy Settings if the Enable for VPN is ticked in the ISP Redundancy page.

If you don't tick then which IP address is used is dependant upon how you configure the VPN Link selection.

However the remote VPN gateways do not have to be managed by the same SMARTCenter, you merely have to tell them about the extra interface, if Check Point can use MEP on the other SMARTCenter to tell about both IP addresses, or if non-Check Point just define as a backup gateway to the secondary link.