Talked to network people at the ISP, they indicate that they have changed something w.r.t. the routing via Eurorings.  It should be researched and hopefully fixed. In the meantime I am thinking about relaying the RIP packets from my own colo host to our gateway as an extra safeguard against things like this. I see that ampr-ripd has options -E and -F that should relay the raw packets to a specified address, good.  That should work. But I don't think it is possible to make ampr-ripd receive and act upon those relayed packets, isn't it?  Should I NAT them at the receiving system so they again have 224.0.0.9 as destination? Has anyone tried such a setup and does it work without nasty issues? (normally all RIP packets will be received twice in this case) Rob