On Mar 26, 2010, at 9:24 AM, Jeroen Massar wrote:
InterNetX - Lutz Muehlig wrote:
Hello,
has someone experience in anycast ipv4 networks (to support DNS)?
"Never been done" "Dangerous" "TCP does not work" etc etc etc.
Can't really tell if you're being serious here due to caffeine underrun. http://www.nanog.org/meetings/nanog37/presentations/matt.levine.pdf Slide 23 seems quite appropriate. http://www.ripe.net/ripe/meetings/ripe-50/presentations/ripe50-plenary-tue-a... has links to other work on this. It certainly seems to work "well enough".
I assume quite a number of people know how to do it, especially as several root DNS servers abuse it.
Simple recipe: - Box with: - Your favourite OS - Quagga or OpenBGPd - Your favourite DNS server - Announce the IP of the anycast node in BGP - Monitor the DNS server, when it does not work kill your local BGPd and notify the admins that it broke
That is it. Probably with the above couple of things, google a bit and find the rest.
Greets, Jeroen