What a pain in the ass. This is why you don't buy Netgear junk.
I just spent the last hour trying to find MIBs for some Netgear switches. Specifically, the GS728TP and GS752TP. Netgear doesn't have MIBs for these anywhere on their website that I could find.
These have a lot of SNMP OIDs on them, (assuming the counters are right, who knows), so they are very graphable.
The enterprise/vendor part of the tree is at: SNMPv2-SMI::enterprises.89 (.22.214.171.124.4.1.89)
However finding MIBs for this was a huge pain.
These are called the RADLAN MIBs. I guess the OS is called RADLAN and may have been developed by Broadcom or Marvell. I'm not sure about that bit.
Dell re-branded some of their switches and those are actually just Netgears with a face job. Netgear has done that with SMC and other vendors as well.
The best place I found with a full set of the MIBs was the LibreNMS repo here:
LibreNMS https://github.com/librenms/librenms/tr ... ibs/radlan
Netdisco also appears to have these https://sourceforge.net/p/netdisco/mibs ... ell/.index
Have fun. Hope this saves someone some time some day.