Hello, I'm currently performing some experiments to find the "best" way to inter-connect a bunch of routers using a shared medium. A common scenario would be a set of 4 routers, for instance a pair of border routers and a pair of core routers. I'd like either a full-mesh or circle topology. Putting all nodes in a /29 isn't ideal because of the DR/BDR/etc stuff. I want all nodes and links to be treated equally. Using point-to-multipoint sounds like a decent solution. I can configure several sessions on a single link without interference, up to the point where the circle is created. Like this: A - B | | D - C However, if I try to add a link between A and C, things start to go not as expected. A already has 192.168.255.2/31 (towards B) and 192.168.255.4/31 (towards D) configured. If I add 192.168.255.10/31 (towards C) and 192.168.255.11/31 on C (towards A), A and C can't ping each other using those addresses. This is because A will announce 192.168.255.10/32 throughout the area and thus "overriding" the 192.168.255.10/31 route on C (traffic will would be sent to either B or D, and not directly to A). What would be the cleanest solution for this? Regards, Ruben Laban