F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

Forum Discussion

Senthilko_37896's avatar
Senthilko_37896
Icon for Nimbostratus rankNimbostratus
Dec 10, 2018

What Happens if you do a DNS lookup on GTM FQDN ?

Hey There !! Totally new to Load Balancing here. We do have GTM/LTM configured for our Web Servers with one GTM pooling 2 LTM'S (for each DC) .If we do a DNS lookup on the GTM FQDN (nslookup FQDN) i...
application delivery
BIG-IP
BIG-IP DNS
security
nathe's avatar
nathe
Icon for Cirrocumulus rankCirrocumulus
Dec 11, 2018

Senthilko,

 

GTM can be configured in many ways. With GSLB and Wide IPs then GTM just has a zone delegated to it and Wide IPs - this responds to a DNS lookup with an IP address which is sourced from a WideIP pool member i.e. LTM VIP.

 

GTM can also be a secondary DNS server or replace/be in front of existing DNS servers. See the implementation guide as I'm sure this will help DNS Implementations

 

Hope this helps,

 

N