On Mar 9, 2012, at 12:11 AM, Elmar K. Bins wrote: >>> 3. IPv6! - Is /32 is standard? We have only one /32 >>> allocation from ARIN and thus if using /32 seems like hard deal - we have >>> to likely get another /32 just for anycasting? or we can use /48 without >>> issues? Also, is /48 a good number for breaking /32 so that we can do /48 >>> announcements from different datacenters in simple uni casting setup? >> >> A /48 is quite reasonable. Announcing a whole /32 just for your anycast >> service would be wasteful. > > Why? It's simply another prefix, no matter how big. It might look > wasteful, but if *that* is the allocation you *have*, it's the > one you ought to use. > > One should be careful - people do filter on allocation lengths, so > breaking out a /48 out of a /32 allocation and advertising it on its > own can lead to it being filtered.
if you know anyone who is filtering /48 , you can start telling them to STOP doing so as a good citizen of internet6. I agree with Woody anything more than /48 for anycast is waste. mehmet
