Dean,
On Mar 27, 2005, at 1:49 PM, Dean Anderson wrote:
Anycast DNS is inadvisable. DNS is specified to work on TCP, and Anycast is unsuitable for TCP.
Can you provide your empirical data that demonstrates using shared unicast is unsuitable for DNS over TCP?
Joe Shen has no compelling need of anycast DNS. It is a bad operational decision to deploy it.
Since you indicate you know Joe Shen's needs, can you describe why he has no compelling need for anycast DNS or why it would be a bad decision to deploy it?
In my experience, shared unicast DNS provides quite a few benefits, particularly in the context of ISPs or services that need to be highly available, at the cost of some additional routing configuration complexity. There are, of course, situations in which the costs of shared unicast DNS outweigh the benefits, but I've found those situations to be rare in larger networks.
Rgds, -drc . dnsop resources:_____________________________________________________ web user interface: http://darkwing.uoregon.edu/~llynch/dnsop.html mhonarc archive: http://darkwing.uoregon.edu/~llynch/dnsop/index.html
