We have a VPN with BM site to site with our server as the master and
another company location as the slave. We now would like to connect a
2nd company location that already has VPN of their own and one of their
slaves is using the same local 10.1.1.X IP addressing scheme. I do not
really want to change our network to a different subnet such as 10.1.2.X
as it would be quite involved to change. Is there a way to have two
subnet's co-exist on my network and only connect the one that doesn't
conflict to the other location. I would need traffic from anyone in the
company to be able to use the VPN is this possible.

Any insight would be appreciated.