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norouz_167230's avatar
norouz_167230
Icon for Nimbostratus rankNimbostratus
Apr 26, 2015

DNS Prefetch

Hello All,

 

I'm using the BIG-IP as transparent DNS resolver cache. I want to know is there Prefetch feature in BIG-IP DNS like the prefetch in Unbound or new versions of BIND. Prefeth to early refresh the DNS cache.

 

application delivery
BIG-IP DNS
dns cache
gtm
LTM
TMOS

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  • Gordon_Bailey-M's avatar
    Gordon_Bailey-M
    Historic F5 Account
    Aug 02, 2016

    I'd also like to know this??? Can we prefetch DNS records on F5 DNS (v12/12.1)???

     

  • PSilva's avatar
    PSilva
    Ret. Employee
    Aug 31, 2016

    Hi Norous (and Gordon)~

     

    I'm not sure about that specifically, but this talks about DNS prefetch and implications:

     

    SOL13930: DNS prefetching feature on client browsers may negatively impact high availability features of F5 products - https://support.f5.com/kb/en-us/solutions/public/13000/900/sol13930.html?sr=56850567

     

    And this document shows a DNS prefetch example (toward bottom) but pertaining to AAM:

     

    https://support.f5.com/kb/en-us/products/big-ip-aam/manuals/product/aam-concepts-11-6-0/18.html?sr=56850463

     

    Not sure if that helps.

     

    ps