Forum Discussion
sameh_atef_2110
Cirrus
CirrusGTM as Authoritative DNS
Hello
We have two data centers HQ and DR. Each Data center has its own DNS server. We want to migrate these 2 DNS servers in both DC to two GTMs each in each DC. And in the same time, to have redundancy. So, in case the GTM in HQ fails or HQ fails itself, users will use GTM in DR and the servers in DR as well . For example, if we have a certain FQDN : xyz.company.com and this is resolved to IP1 in HQ from its DNS and resolved to IP2 in DR from its DNS. So, how this can be done ?
Simon_BlakelyEmployee
You can use a zone transfer to import the data from the existing DNS into the GTM (zonerunner/bind).
Replacing a DNS Server with BIG-IP DNSYou define your GTM server pools based on Global Availability with HQ virtual servers as a preference, and create WideIPs (e.g xyz.company.com) pointing at those server pools.
Integrating BIG-IP LTM with BIG-IP DNS systemsAt a global DNS level, you define both the HQ and DR GTMs as nameservers, so that if HQ is down, queries will go to DR.