Kluge delegation of a single host

[Michael Voight]

Christine.Tran at East.Sun.COM wrote:
> 
> Gurus,
> 
> We have a TIS BSD box running 4.9.3-P1.  I found this kluge and wonder if this
> is workable in 8.2.  There's a server farm of 10 servers distributed
> geographically, they all answer to www.jelly.com.  They used Cisco Distributed
> Director (CDD) which figures out which of the servers are alive and return the
> closest IP to the querry source based on shortest route and trip time.  The
> kluge is in the zone file, which seems to delegate the *host* www.jelly.com
> to the CDD ( I have only seen delegation of a zone, not a single host but I don't see why it shouldn't work.)
> 
> www.jelly.com.  IN      NS      CDD.jelly.com.
> cdd.jelly.com.  IN      A       1.2.3.4
> 
> I have not seen this before, is it legal? and workable in BIND 8.2?  If not,
> can I mimic this dynamic load balancing within BIND somehow?
> 
> QCT

There is nothing wrong with delegating a single host to DD.
The upper level server has no clue that www is just a single host.
Once it delegates the domain, it doesn't care what is in it.

The general problem with DD is usually when the upper level server is
using a forwarder. If this occurs, then the server will direct the
request to the forwarder rather than the Distributed Director.

Michael Voight
Cisco Systems TAC
(Yes, I support Distributed Director, CDDM, and Network Registrar DNS
servers)