Do those larger sites have both an Internet circuit and a P2P circuit?   Have you considered simplifying and getting rid of the P2P link and bumping the Internet circuit size?   You could put a layer 3 switch at the larger sites, plug the P2P circuit into that, and run OSPF over it.   You could use an MX with a dedicated VLAN configured for the P2P link, and then a VLAN for each local subnet. ... View more