On Thu, Jan 4, 2018 at 2:16 PM, Job Snijders <j...@instituut.net> wrote:
> On Thu, 4 Jan 2018 at 20:13, Filip Hruska <f...@fhrnet.eu> wrote: > > I thought that the smallest prefix size one could get routed globally is > > /24? So how does this work? > > > Probably with GRE, IPIP or OpenVPN tunnels. > Hi Flip, Job: With the cooperation of your local ISP, it's possible to get clever about this. If your ISP sets its filter to allow it, you can send packets from the /27 directly without having to transit the GRE tunnel. So, half the path has no latency hit at all. The tunnel ingress which takes the /24 off the Internet and sends the /27 to you does not have to be a single node in a single location. GRE and IPIP both support stateless multipoint tunnels where they can receive packets from multiple sources. The /24 can be anycasted from multiple nodes around the world allowing near-optimal routing from most origins. Regards, Bill Herrin -- William Herrin ................ her...@dirtside.com b...@herrin.us Dirtside Systems ......... Web: <http://www.dirtside.com/>
