Forum Discussion
CirrusDNS Caching
Hi
Does anyone know where can I check or set the DNS Cache settings that LTM uses?
I am assuming it is in one of the base linux files, but I am unable to find it.
5 Replies
mimlo_61970Cumulonimbus
I believe by default there is no caching. It can be setup though
- mimlo_61970
here is a better link, it is just the table of contents off the above link.
SLHi Mimlo
What i am trying to determine is what are the default settings that are being used for DNS retries, timeouts before going to next DNS server and caching.
This is for LTM with no other DNS settigns configured besides the ones listed as name-servers.
- mimlo_61970
Default for caching is no cache. You need to set it up. The other values are controlled by resolv.conf which can be modified with tmsh. The defaults in linux are controlled by resolv.h, which I cannot find on my ltm. The standard is 5 second timeout(how long it waits for an answer), 2 retries(number of queries sent to a name server before giving up) I can't say for sure if F5 follows these defaults or not, but I would assume so.
Muhammad_Irfan1Hi mimlo i have asked a question below this one. Please answer on that as well, i am in deep need.
