Distributing DNS servers

[Barry Margolin]

In article <7q8oei$nmf$1 at nyheter.crt.se>,  <peter at nospam.se> wrote:
>Barry Margolin <barmar at bbnplanet.com> wrote:
>
>Mr, Margolin:
>
>I must confess, i do not understand the motivation for these schenarios.
>Please enlighten me (and maye others) why this is done, and
>what benefits are gained.

There are several benefits:

1) We can tell all our customers the same DNS server IP addresses,
regardless of where they're located on our backbone, and they'll still
query the closest server.

2) If a server goes down we can remove it from the routing table, and
customers will be re-routed to the next closest server.  This is better
than the resolver failing over to a backup server, because there's no
timeout involved.

3) We can add and remove servers from our backbone as necessary without
customers having to reconfigure their systems.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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