On 4/8/2011 2:42 PM, John Wobus wrote:
All the previously-mentioned issues apply, but (obviously)
round robin could be made to offer a select server twice as
often by giving that server an additional address and
A record. Something similar for nameservers could
be devised.
Mostly unnecessary for nameservers, since as previously mentioned RTT
(round-trip time) values are used for nameserver selection, if
available, and is tracked by IP address, not by nameserver name.
I had a vague recollection that one could simply
duplicate an A record in the zone file, but perhaps my
memory is playing tricks on me.
That may have worked at one time, but not for anything that conforms to
RFC 2181 (published July 1997), Section 5 ("It is meaningless for two
records to ever have label, class, type and data all equal - servers
should suppress such duplicates if encountered").
- Kevin
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