Hi Andrew, > I assume you add the 192.168.11.1 and 192.168.12.1 to the interfaces > using global scope? Global scope means the IP addresses are valid > everywhere. All routers should know how to route packets to these IP > addresses. So a host is free to pick any of its global scope IP
Yes their scopes are global, > It sounds like your router is doing reverse path filtering. It is > checking its routing table for the source address, and throwing the > packets away if they don't come in the interface the route points out > of. and yes the routers do reverse path filtering. Now I understood that this is an intended and in fact a legitimate behavior. So it seems that one thing I can do is to talk with networking people to accept these packets. Another option that has come to my mind is to change the address scope to link-local and assign a global, routable address to a dummy interface so that Linux chooses the address for the dummyif. I'm going to evaluate these options. Thank you! - ymmt
