During a complete renumbering, I'm trying to establish a standard for DNS records. After all, every zone file is going to have to be touched, so we might as well update them at the same time. Various techs have done odd things over the past decade. Having no guidance so far from this group, despite the grumbling about times becoming shorter and lack of analysis, I thought "Well, vixie will know the best practice!" I remain unenlightened. Should it be 2 days? Or 1 hour? And why the inconsistent results? Obsolete root glue records? A simple dig yields: ;; ANSWER SECTION: vix.com. 2D IN NS ns-ext.vix.com. vix.com. 2D IN NS ns1.gnac.com. ;; AUTHORITY SECTION: vix.com. 2D IN NS ns1.gnac.com. vix.com. 2D IN NS ns-ext.vix.com. But a dig directly to the ns1.gnac.com or ns-ext.vix.com server yields: ;; ANSWER SECTION: vix.com. 1H IN NS ns.lah1.vix.com. vix.com. 1H IN NS ns.sql1.vix.com. vix.com. 1H IN NS ns-ext.isc.org. vix.com. 1H IN MX 10 sa.vix.com. vix.com. 1H IN MX 20 fh.vix.com. vix.com. 1H IN TXT "$Id: vix.com,v 1.190 2004/08/12 19:06:05 vixie Exp $" vix.com. 1H IN A 204.152.188.231 vix.com. 1H IN SOA ns.lah1.vix.com. hostmaster.vix.com. ( 2004081201 ; serial 1H ; refresh 30M ; retry 1W ; expiry 1H ) ; minimum ;; AUTHORITY SECTION: vix.com. 1H IN NS ns.lah1.vix.com. vix.com. 1H IN NS ns.sql1.vix.com. vix.com. 1H IN NS ns-ext.isc.org. ;; ADDITIONAL SECTION: ns.lah1.vix.com. 1H IN A 204.152.188.234 ns.lah1.vix.com. 1H IN AAAA 2001:4f8:2::9 ns.sql1.vix.com. 1H IN A 204.152.184.135 ns.sql1.vix.com. 1H IN AAAA 2001:4f8:3::9 ns-ext.isc.org. 1H IN AAAA 2001:4f8:0:2::13 ns-ext.isc.org. 1H IN A 204.152.184.64 sa.vix.com. 1H IN A 204.152.187.1 sa.vix.com. 1H IN AAAA 2001:4f8:3:bb::1 -- William Allen Simpson Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32