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mniemiec_63167's avatar
mniemiec_63167
Icon for Nimbostratus rankNimbostratus
Mar 03, 2010

GTM/DNS - How to delegate just the main domain to GTM

Here is the issue I have with DNS/GTM. We have our own DNS servers that run the main domain i.e. test.com. Specific subdomains are delegated to the GTM's such as marek.test.com. This works great.

 

 

However now we want to put the main site on the GTM's, test.com while keeping all the other subdomains like corp.test.com on our main DNS servers.

 

 

Does anyone know how you can delegate just the main domain to the GTM's? So any queries coming to our DNS servcers for test.com will get forwarded to the GTM's, while others like corp.test.com will get answered by our DNS servers. The DNS folks at my company are stating this cannot be done due to the SOA present on test.com.

 

 

Any help would be greatly appreciated. Thank you.

 

 

Marek
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  • Spidey_29396's avatar
    Spidey_29396
    Icon for Nimbostratus rankNimbostratus
    Sep 13, 2011
    Hi Guys,

     

     

    Does enabling allow-transfer on DNS servers and creating a master zone file means GTM will be the primary DNS right away?
  • IRONMAN's avatar
    IRONMAN
    Icon for Cirrostratus rankCirrostratus
    Jan 20, 2015

    I am New To GTM,So my question is simple

     

    for example , i have dove.com, which was published over internet, but i want to resolve the DNS requeste on my local GTM, but if user from home request dove.com, it will go to (INNI DNS servers). how come my GTM Box can select best server and provide the IP to user?

     

    my guess, i have record on INNI DNS server, stating, get DNS request from my GTM BOX?

     

  • Or_Yaacov's avatar
    Or_Yaacov
    Ret. Employee
    Jan 20, 2015

    GSLB for top level domains can not be done through delegation (cname is not an option) You have to be in line. YOu need to create a delegated subdomain from your ISP to the GTM , meaning the CNAME will point to a NS which is the GTM that is the NS for that domain e.g.

     

    Alternatively without delegation you need to be the Authoritative of the entire domain. you can host the Zone file on the GTM , make it the Auth server and add the DTM Wide-IP as the records you wish to provide to GSLB

     

  • IRONMAN's avatar
    IRONMAN
    Icon for Cirrostratus rankCirrostratus
    Jan 21, 2015

    Thanks Yaacov, I Understood, CNAME will Point out my GTM as DNS Server or NS for user try to access from public internet, CNAME point out the FQDN name, I have Multiple GTM across global, with same FQDN, what will happen in real scenario,

     

  • Or_Yaacov's avatar
    Or_Yaacov
    Ret. Employee
    Jan 29, 2015

    All your GTMs should sync in order to provide the same domain. Each GTM might respond differently to the A / AAAA query that was delegated to him from a CNAME. Each GTM will have a wide-ip that holds the A record and behind it a pool of addresses based on your policy to resolve to.

     

    Please see also : https://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-implementations-11-6-0/4.html?sr=43504147

     

    https://support.f5.com/kb/en-us/solutions/public/0000/200/sol277.html?sr=43504147