![]() | maxifleur.fr. | |||
![]() | ns1.ispi.nl. | 87.253.139.138, 2001:968:182::1337 | ||
![]() | ns2.ispi.eu. | 87.253.139.138 | ||
All addresses should be distinctTo avoid losing all connectivity with the authoritative DNS in case of network outage it is advised to host the DNS on different networks.
The Domain Name System requires that multiple servers exist for every delegated domain (zone). This document discusses the selection of secondary servers for DNS zones. Both the physical and topological location of each server are material considerations when selecting secondary servers. The number of servers appropriate for a zone is also discussed, and some general secondary server maintenance issues considered.
The nameservers ns1.ispi.nl., ns2.ispi.eu. are using the same IP address (87.253.139.138).