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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: How common is lack of DNS server diversity?
> From: Sean Donelan [mailto:[email protected]] > Sent: Friday, January 26, 2001 7:01 PM > > Mice and Men found that 38% of the .COM domains surveyed > had all their name servers on the same subnet. And 75% > had one or more configuration errors. > > http://www.menandmice.com/dnsplace/healthsurvey.html Distribution requirements,of root name servers, is dependent on where in the tree you live. dot root servers should be spread out, as they are authoritative for everything. TLD root servers should also be spread out, they are authoritative for many things. SLD root servers need not be spread out so much, they are authoritative for few things. 3LD root servers don't need to even leave their AS, if the AS is down the servers, they are authoritive for, are probably also down. 4LD root servers ... who cares? More interestingly, how many root servers allow recursive lookup?
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