SNMP Setup part duex

I just looked through 20+ threads asking about SNMP MIB, OID, etc. Seems like most of them were closed without an answer.

What i did manage to find alluded to using the default SNMP values for linux. That just isnt much help for me. I managed to find a few like;

.1.3.6.1.4.1.2021.10.1.3.3
UNTANGLE | CPU LOAD 15 MIN

.1.3.6.1.4.1.2021.4.11.0
UNTANGLE | RAM FREE

.1.3.6.1.4.1.2021.10.1.3.1
UNTANGLE | CPU USAGE

.1.3.6.1.2.1.25.1.6.0
UNTANGLE | PROCESSES

But i need more.

I would like to find the things than you can get from the gui homepage like: TX / RX, percentage of free memory, # of sessions, data read and data write.

Any help would be appreciated.