> I have a proven, software-only solution that removes a dead > gateway's A record from the gateway's record set. This adds some > intelligence to the dumb load distribution, but is still not > intelligent load balancing.
There's also a proven, software-only solution already built in to Windows. An appropriately configured Windows client can trigger self-registration via DDNS every 30 seconds, while you scavenge old records on the server side every 60 seconds (or however granular you want to get with it). Unless you get sub-second granularity, though, any polling-based solution using DDNS or any other kind of remote ping/port check + DNS update stands some chance of message deferral, and if it's unacceptable to have n number of messages (peak n will depend on site-specific average msgs per polling period, of course, and this might be very close to zero) have to wait an entire queue cycle to be retried, there are more robust choices, still not requiring any third-party software: · network load balancing, allowing for traffic-sensitive load balancing and failover · a fake DNS root, using the MX algorithm for standard round-robin load balancing plus failover I have taken to using NLB in most such installations and no longer deal with either of the DNS-centric options, but they do have considerable effectiveness and should be evaluated before opening more complex cans of worms like NLB. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.imprimia.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases! http://www.imprimia.com/products/software/freeutils/exchange2aliases/download/release/ http://www.imprimia.com/products/software/freeutils/ldap2aliases/download/release/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
