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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: DNS Anycast as traffic optimizer?
On Wed, 1 Sep 2004, Steve Francis wrote: > > Christopher L. Morrow wrote: > > >If I read your original request correctly you were planning on: > >1) having presence in multiple datacenters (assume multiple providers as > >well) > >2) having a 'authoritative' DNS server in each facility (or 2/3/4 > >whatever per center) > >3) return datacenter-1-host-1 from datacenter-1-authserver-1, > >datacenter-2-host-2 from datacenter-2-authserver-1, and so forth. > > > >This isn't really 'anycast' so much as 'different A records depending on > >server which was asked' > > > > > Well, there'd be one NS record returned for the zone in question. That > NS record would be an IP address that is anycasted from all the datacenters. > So end users (or their DNS servers) would all query the same IP address > as the NS for that zone, but would end up at different datacenters > depending on the whims of the anycasted BGP space. Hmm, why not anycast the service/application ips? Having inconsistent DNS info seems like a problem waiting to bite your behind. > > > I suspect you'd really also introduce some major > >troubleshooting headaches with this setup, not just for you, but for your > >users as well. > > > > > I don't doubt that. :-) > which I'd think you'd want to minimize as much as possible, right?
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