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Forum Discussion

Techgeeeg_28888's avatar
Techgeeeg_28888
Icon for Nimbostratus rankNimbostratus
Jan 03, 2013

DNS Query Flow

Hi Everyone,   I have a small query realted to DNS query and how GTM works.     I have GTM configured with 2 ISP links and acts as DNS. Now i need to know the following     1) A cl...
config
design
Gregory_Thiell's avatar
Gregory_Thiell
Icon for Employee rankEmployee
Aug 06, 2015

Hi Techgeeeg,

 

My bad, the TTL value we can see in ZoneRunner doesn't seem to show what is actually sent by GTM: the default TTL is not 0 but 30s. So the record should be cached by the LDNS for 30s. This value can be changed in the advanced properties of the Wide IP Pool, and tested with dig.

 

In any cases, we are talking about DNS requests and responses, which are very light because using UDP.