Forum Discussion
NimbostratusF5 GTM/DNS Sub domain delegation
Hi Everyone,
Just a quick question, let's say I have an existing domain entry on my DNS Server that directs to a specific A record (202.1.1.1). Then I decided to use a GTM for GSLB, should I remove the A record and create a CNAME record () and delegate it to my GTM wide IP? Is there also a downtime when I do this?
Thank you!
AneshCirrostratus
If you are planning to use the GTM to do DNS loadbalancing for , then Yes you must delete the A record and point it to the CNAME
IN CNAME
The downtime will depend on the TTL for the A record
I_R_101_110Cirrus
This is what you need: https://support.f5.com/csp/article/K277
In addition to the CNAME record in place of the A record, you'll require the NS record for the delegated sub-domain as well as the A records describing the hosts in the NS record.
l_luposThank you for your answers, much appreciated. But can I force the DNS config to lessen the downtime?