[ednog] anycast DNS

[Andrew W. Elble]

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On Tue, Apr 05, 2005 at 05:26:42PM -0500, Jay Ford wrote:
> On Tue, 5 Apr 2005, John Kristoff wrote:
> > On Tue, 5 Apr 2005 13:40:29 -0500 (CDT)
> > Jay Ford <jay-ford at uiowa.edu> wrote:
> >
> > > Does anybody have any kernels of wisdom which I could factor in as I continue
> > > down this road?  Specifically, does anybody have a slick script to predicate
> > > the announcement of routes for the service addresses on the availability of
> > > DNS on the service addresses?
> >
> > Jay,
> >
> > Do you mean like the example presented in Appendix D here?
> >
> >   <http://www.isc.org/pubs/tn/index.pl?tn=isc-tn-2004-1.txt>
> 
> That's most of it.  Thanks for the reference.
> 
> I'm also thinking about cases where named is still running but not answering
> queries for whatever reason.  That would require killing the routing if named
> failed to answer a test query.  I guess a loop containing
>    host -t a ${q_name} ${serv_addr} || ifconfig ${interface} down
> would about do the trick.

Jay,

  We've had good luck using IOS server load balancing for this kind of
thing. We're not currently using it for DNS, but have plans to do so
this summer...


Andy

- -- 
Andrew W. Elble
aweits at discipline.rit.edu
Senior Network Engineer
Rochester Institute of Technology
PGP: BFAD 8461 4CCF DC95 DA2C B0EB 965B 082E 863E C912

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