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Bobbybobby's avatar
Bobbybobby
Icon for Altostratus rankAltostratus
Sep 26, 2019

BIGIP DNS Domain registrar NS records

For BIGIP dns deployments, just wanted to confirm the domain registrar NS records I need to use for the different deployments.

 

For delegation mode, I’m assuming the NS records stay the same and keep pointing to my externals BIND servers, correct? Then the external dns servers will send back the specific replies for the sub domain which is managed by bigip DNS?

 

For in-line mode, the domain registrar NS records now point to my external facing BIGIP dns appliances?

 

If so, what is best practice if you have multiple DCs. Is it as simple as pointing one Domain registrar NS record at GTM1 in DC1 and pointing the secondary NS records at GTM2 in DC2? What about organizations that may have 5,10 DCs? Do they simply just pick 2 out that most likely won’t go down?

 

application delivery
BIG-IP DNS

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  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Nov 19, 2019

    I have implemented the in-line mode. Typically, you can have 1 GTM per Region. There is typically 1 DC per region and so, 1 GTM per DC. If you have multiple DC per region, you can choose 1 DC to be the GTM DC.

     

    Now, you can have multiple GTM in a DC, if you have more traffic and critical applications in that location, depending on your business. As a rule of thumb, 2 GTM per Region/Continent/DC is acceptable.

     

    Example: NA - 4 DC - 2 GTM per Region for 2 in total. So, 2 of the 4 DC need not have GTM.

     

    The exact numbers depends on your business needs. Sorry, a bit vague but hope I was able to provide some framework.