>>If I drop our TTL value for our mail server to two hours how long does it >>take to propagate thru the dns servers? > It takes: >>Currently the TTL value is set for 12 hours ... > 12 hours.
plus Refresh interval if the slaves don't support NOTIFY. Assume a 4 hour Refresh interval, the worst case scenario would be: - slave makes a SOA query and finds it has the latest serial number - you change your master - 3.99+ hours later someone queries the slave and receives and caches the old IP with a 12 hour TTL - 11.99+ hours later that IP is still in the cache Worst case a total of just less than 16 hours. -- [EMAIL PROTECTED] "The avalanche has already started, it is too Rod Dorman late for the pebbles to vote." � Ambassador Kosh 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/
