On Sun, Aug 12, 2012 at 5:25 AM, Oliver <[email protected]> wrote: > On Sunday 12 August 2012 04:11:25 Voice of the Blind ™ Network Operation > wrote: >> Hello, >> is a anycasted Prefix a good idea for Streaming? >> here's what we're thinking about: >> 1. get a /48 from a LIR or a RIR and anounce it through Hurricanne >> through several Tunnel server including Singapor, New york and >> Amsterdam >> 2. run 3 diferent Icecast server in each of the locations where >> frankfurd would be the Master Server while the 2 others would be a >> slave relay >> 3. Assign same Ipv6 address to each of the icecast server where we >> would be using other prefix to do Inter server communication >> so if someone is in North America would go through new york, if is in >> south east asia would be throug SG, otherwise africa/Europ would go >> through Frankfurd >> is that a good idea for streaming performance ? >> any other suggestion is welcome >> Thank you > > What you are talking about isn't really Anycast from the perspective of the > rest of the world since what you're saying sounds like you'll just be single- > homed behind HE.
anycast can take many forms, including anycast inside a single ASN which to the outside world looks like a single announcement (or even an announcement covered by an aggregate) - 4.2.2.2 falls into that sort of deployment, I believe. > Regardless of whether you peer with HE in multiple locations or just one, the > AS path is still going to be the same and will enter into 6939 at whatever the > BGP-closest point is - the Anycast aspect essentially exists only between you > and HE. well, if he's proposing a 'single server' (simplistic on my part) at each of 3 locations which then has some routing gear (or quagga?) linking it to HE ... that's 'anycast' (in the same way as many root server operators do it) > Providing HE are configuring a discriminator across their iBGP routers to take > the shortest path at entry points you're not directly peered to, the whole > thing should Just Work, sudden topology changes notwithstanding. agreed. One would probably be interested in not the 'anycast' so much as 'why are you doing 3 deployments'? and maybe: "is redundancy and traffic direction something better done in DNS than BGP"? questions. -chris
