Forum Discussion

Ravager's avatar
Icon for Altostratus rankAltostratus
Aug 12, 2021

Split brain forwarder query

Given a split brain zone


I want to be able to specify which forwarder is used to fully resolve the ip with no referrals.


ie internally goes to a cname which via wide ip will give a appropriate 10.x.x.x externally goes to a cname which maps to multiple aws dns entrys resolved via google dns ( is 3.x.x.x


Like is there a way if I create two dns listeners say x.x.x.1 and x.x.x.2 the forwarder for .1 if needed goes to 10.x.x.10 or if .2 if needed is


1 Reply

  • So I assume zones and are delegated to F5 DNS (GTM) and F5 DNS is authoritative for them. Main primary zone is owned by primary DNS (LDNS) server (may be Inflobox, Bluecat or MS server). Please correct if this understanding is wrong.


    There could be many other smart ways to split this, but one of the way I think is


    • If is authoritative with your F5 DNS (GTM), you can just go that zone and create new NS record for and point to appropriate NS server. GTM will forward queries for this to that NS server.
    • Or if all records inside needs to be forwarded to external NS server, you can delegate the entire zone via GTM.
    • If your F5 is not authoritative for zone (or doesn't need to be) , you can simply delegate that zone to it's NS servers from your main DNS server itself who is owning