To be absolutely safe, choose 4-5 of the ideas, track all of them and use a composite track object to combine them :)
You can find a lot more details (including the oscillating routing problem) here: http://www.nil.com/ipcorner/SmallSiteMultiHoming/ http://wiki.nil.com/Small_site_multihoming Good luck! Ivan Pepelnjak blog.ioshints.info / www.ioshints.info > -----Original Message----- > From: Andrey Gordon [mailto:andrey.gor...@gmail.com] > Sent: Monday, February 01, 2010 4:14 PM > To: Nanog > Subject: Default route with object tracking > > Hi list. > > I'd like to setup my default routes to the Interwebz to be conditional on > reachability of something on the Interwebz. I got two different ISPs (no > BGP). I'm trying to figure out what would be a reliable object to track? > Meaning, it's probably not reasonable to track my ISPs default gateway, > since it does not protect me from someone on the ISP side screwing up. I'm > thinking of tracking something like google.com, but am not sure if after I > resolve google.com for the first time, it will be simply tracking an > arbitrary server (or some load balancer). > > I wanted to see what experienced folks think is a reliable tracking > target. > Any comments are much appreciated. > > thank you, > > > ----- > Andrey Gordon [andrey.gor...@gmail.com]
