Round Robin DNS ?

[Kevin Darcy]

Cricket Liu wrote:

> > > Use BIND 8.2+'s rrset-order substatement or a sortlist.
> >
> > Of course, a huge caveat applies to rrset-order and sortlist: since those
> > are configuration-file constructs, every authoritative server (master and
> > slaves) and every potential caching server would need to have the same
> > configuration-file directives, in order to accomplish full coverage of
> > the proper RRset sorting/ordering. For the Internet, of course, this is
> > totally impractical, since the number of potential caching servers for
> > any given public RRset is virtually limitless, and there is no central
> > control of nameservers. For these reasons, the current implementation of
> > RRset ordering/sorting tends to be limited to small and/or
> > centrally-managed private networks.
>
> This is just plain misleading.  rrset-order works fine with low
> TTL records.

If one is willing to accept the increased query traffic, sure.

Moreover, low TTL's only "solve" the caching problem: the rrset-order's still
need to be maintained in the config files of all the slaves, and often slaves
are run by a separate organization, e.g. a network service provider, who might
not be able or willing to maintain individual rrset-order's for all of their
customers.

I'd be interested to know if anyone is actually using rrset-order effectively
for any Internet names.


- Kevin