Hi All - first post on this forum so hello

I've been using rhe Vigors for quite some time now but just starting to explore the possibilites of using the dual wan interface to give load balancing or failover.

My problem is though is that I need to keep the same IP visible externally as it's being used for mail feeds, vpns, etc. I've noticed the newer models have a virtual wan interface. It's easy enough to get an extra IP from the ISP but can I use that as a 'virtual wan' so if either of the isp feeds into wan 1 or wan 2 go down the 'virtual ip' is still visible externally so it can receive traffic?

TIA