Forum Discussion
NimbostratusDoes LTM cache DNS entries in ramcache if no web acceleration profile applied to the virtual server
Trying to understand how DNS caching works on the LTM. If I do not apply a web acceleration profile to that virtual server will it cache DNS entries in ramcache? My virtual server uses an irule RESOLV::lookup b/c the back end server ip may change. I need for it not to cache the dns entry. I see that I can configure a web acceleration profile and then exclude links but is that necessary if I don't apply any web acceleration profile? What gets written to ramcache? if I don't do anything and leave the system defaults will it save to ramcache? When I run show ltm profile ramcache all - it shows 0 records.
rgordon_01I've found documentation stating ramcache option to enable/disable is found in HTTP profile but I do not have that option. I'm running version 11.5.3 Build 2.0.196 Hotfix HF2. I could probably use the CACHE::disable option in my irule also (probably several ways to go about no caching an entry). But I really would like to understand where ramcache is configured and how it works though.
It does but not in ram cache. It has nothing common with web acc profile. Find details here https://devcentral.f5.com/wiki/irules.resolv__lookup.ashx
