Hi, I am looking for a method of providing DDR backup support to our hosts currently using EVDO Internet connections. GRE tunneling seems like just the ticket, although I am not dealing with a medium that is either up or down, but that suffers varying degrees of packet loss. I know I can set up a GRE tunnel with keepalives in order to get by with a little or even a lot of packet loss, but my issue here is that there doesn?t seem to be any way to specify how many successive keepalives should be received before restoring the tunnel to an up/up state after having been brought down. For a configuration like this to work, I am thinking I will need the tunnel to remain down until the packet loss subsides rather than just coming up as soon as a keepalive successfully goes round-trip, which will continually happen even during a very lossy period. Is there a way to configure GRE for this, or even another method of providing a reliable, self restoring DDR implementation in this type of environment? Any help is appreciated! Thanks!