good networking

Thu Mar 27 08:25:22 UTC 2003

>
> Despite very old recommendations, the Iraqi state provider Uruklink.net
> kept all of its name servers on the same subnet.  Although this is
> recognized as a poor design, many domain name server operators worldwide
> do the same thing.
>
> nic1.baghdadlink.net.   2D IN A         62.145.94.1
> nic2.baghdadlink.net.   2D IN A         62.145.94.2
>
The way how I see this that there is hardly any incentive to do proper placement
of nameservers. The pain inflicted if something goes wrong is minimal unless
you are a billion dollar company doing millions of online transactions. And if something
goes wrong and you still fly, maybe a very tiny fraction of the population will appreciate
that you did your homework.

The above applies to many other good networking practises than DNS related ones.

It can also be said that maybe the above addresses are carried as /32 inside
the destination AS. They might not be on the same subnet. If the number of domains
having DNS´s in the same subnet is large, the number of domains dependent on
a single AS for their DNS service is even greater.

As you all well know, the usual excuse to do poor job is being too busy to do it properly
and if failures come every year or two, this might just hold water.

Pete