Forum Discussion

Emmett_116863's avatar
Emmett_116863
Icon for Nimbostratus rankNimbostratus
Mar 12, 2014

Use GTM Cluster for internal recursive name resolution

Hi Everyone,   I have been trying to set up what I would think would be a fairly normal configuration.   I have a pair of F5 GTM's running 11.3 running as authoritative name servers for a few d...
BIG-IP DNS
deployment
design
  • Cory_50405's avatar
    Cory_50405
    Mar 12, 2014

    You can assign your listener address to whatever you want from that internal vlan. It doesn't have to be a floating IP address, but it can be. In the DNS profile you attached to your listener, did you enable 'Use BIND Server on BIG-IP'? Since you defined recursion through named, it'll need to be able to use BIND.

     

    If locally issued GTM queries can't recurse out to the Internet, then it could be something is preventing it from getting out, like a firewall.

     

Emmett_116863's avatar
Emmett_116863
Icon for Nimbostratus rankNimbostratus
Mar 13, 2014

Thanks Cory!

 

You nailed it ... the firewall was blocking the traffic.

 

There really doesn't seem to be any consistent answer as to which interface the "cluster" is going to use when sending traffic...sometimes it seems to use the floating IP, sometimes the MGMT IP, sometimes the real EXTERNAL IP on the individual GTM (same goes for our LTMs)...it's a little frustrating sometimes.

 

Anyway, thanks a ton. :-)

 

(You wouldn't happen to know about dealing with multiple views, would you?)