Dear users of the Bird internet routing daemon, First of all I am sorry for my e-mail which I have sent some minutes before. It was a mistake and you can ignore my last mail. Now to my question: I want my OSPF to distribute the default-route ONLY and ONLY if the ISP is available. Means, if the link, or the IP isn't available, my OSPF should be quite. Further information: ISP (ISP is up) l (Link is up) R1 (Interface is up) R1: everything is ok, I can reach the ISP, so I am the default-gateway for everybody below me. ISP (ISP is down) l (Link is up) R1 (Interface is up) R1: Oh gosh! The ISP is down! I am now no longer the default-gateway for everybody below me. ISP (ISP is up) l (Link is down) R1 (Interface is up) R1: Oh, I can't reach my ISP... Ok, I need to stop telling everybody below me I am the default-gateway. I was thinking about the bfd protocol, but bfd is kinda new and you can't run more than one instance in bird. So I need another solution... Btw, yes I've already searched for these problem in the mailing list but I am not satisfied. Either my keywords were wrong or there isn't any person with this kind of problem... yet. Thank you very much for reading. Regards.