Ryan Byrd wrote: > having a super short TTL is a great way to overload your DNS servers and > clients don't have to honor the TTL anyway and will often cache the records. > IE caches records for 30 mins, I believe, for example.
I will vouch for that fact. Even worse, Outlook Express will cache until it is shutdown. Another trick some setups use is to order DNS replies so that the primary/nearest/best is listed first and the secondary/farthest/worst follow. Well that's all well and good until it runs through another DNS server who is not bound to honor that ordering, and typically will not. Here are a few URLs I've bookmarked on the topic. HTH http://homepages.tesco.net/J.deBoynePollard/FGA/dns-round-robin-is-useless.html http://tenereillo.com./GSLBPageOfShame.htm http://www.zytrax.com/books/dns/ch9/rr.html Corey
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