On Sunday, 14 October 2018 5:01:41 PM AEDT Andrew McGlashan via luv-talk wrote:
On 03/10/18 14:28, Rick Moen via luv-talk wrote:
RFC2182 section 5 recommends minimum 3, maximum 7 authoritative nameservers for a domain, so five is pretty good.
RECOMMEND ....
Minimum is two, I've never seen any problems having just two with both being on different Internet links at different locations. It wouldn't
daisee.com. 21599 IN NS ns-1221.awsdns-24.org. daisee.com. 21599 IN NS ns-2000.awsdns-58.co.uk. daisee.com. 21599 IN NS ns-912.awsdns-50.net. daisee.com. 21599 IN NS ns-420.awsdns-52.com. If you use "Route 53" (the DNS service from Amazon) then by default you get 4 authoritative name servers such as the above from different regions and different TLDs. I don't know if this is because the Amazon SREs have encountered unusual situations where multiple TLDs have become unavailable for some reason making this sort of thing genuinely necessary or whether they are just going over the top to convince customers that they will get an unreasonable number of "nines" of uptime. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/