[dns-operations] F Root question
jabley at hopcount.ca
Wed Jan 14 16:39:12 UTC 2009
On 14 Jan 2009, at 11:27, Chris Cowherd wrote:
> Good day everyone. We are building out a new authoritative DNS
> infrastructure and my systems engineering director had a question I
> didn't necessarily know the answer to. Could someone be so kind to
> point me in the right direction?
> " F Root, operated by ISC, has 2 "global" nodes (one in SF and one
> in Pal Alto); and the remaining 44 nodes are dubbed "local".
> What functions do the global servers perform that the local ones do
> not. I.e., what is the functional difference between the two? "
The "global" and "local" distinction relates to how the service is
distributed using anycast. The distinction was something I made up
when I wrote ISC-TN-2003-1, and which Kurtis and I used again when we
wrote RFC 4786.
There is no functional difference between any of the various nodes of
F -- they all answer identically. The difference is only in the client
base. Local nodes serve a local set of clients (for some topological
meaning of "local"); global nodes serve, potentially, the whole
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