Re: FW: [Full-Disclosure] Question for DNS pros

[John Hall]

Is this true for the servers that are doing the recursive lookups for the clients on your networks?  Seems somewhat risky, but it's true that such setups would make RTT less useful.  It's one of the problems with making GLSB work well.  Our experience with several large sites indicates that the majority of client connections are sent to the "best" (as defined by the 3-DNS configuration) data-center, so we conclude that most sites (or at least the ones servicing our customers' clients) do have their local forwarding DNS servers "close" to the clients they serve. JMH Gary E. Miller wrote: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Yo John! On Wed, 4 Aug 2004, John Hall wrote: Just about any response is useful for RTT/reachability measurement as long as we can associate it back to the correct probe. My name servers are not even in the same state or AS as my dialups and colos. So RTT measurement to my DNS servers is useless to get info about the rest of my network. I often hear complaints about the perverseness of global load balancing using DNS queries. RGDS GARY - --------------------------------------------------------------------------- Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701 [EMAIL PROTECTED] Tel:+1(541)382-8588 Fax: +1(541)382-8676 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQFBEVZV8KZibdeR3qURAvJjAJ9Bg73e7XkR+yMPijBXmMvzlIi5FwCgw32p Jlla1PIZzlavaOwezTeg2Ys= =cL1c -----END PGP SIGNATURE----- -- John Hall Test Manager - Switch Team F5 Networks, Inc.