Oh I wish OpenWRT supported these models, maybe in time as OpenWRT on switches is really new.
I had to do a whole song and dance changing my SNMP monitoring as this unit behaves different to the MS510TXPP.
IF-MIB::ifSpeed reports in bits, which is kinda pointless given its a 32 bit figure so can't represent the faster speeds. I had to change to IF-MIB::ifHighSpeed which rounds to Megabits, which is what the old model did for ifSpeed. Surely there is an SNMP standard that decides what format you are supposed to report?
IF-MIB::ifHCInOctets and IF-MIB::ifHCOutOctets doesn't report at all over SNMPv1 but did on the older model. I wasn't intentionally using SNMPv1 (lazy copy/paste of PHP code) and switching to SNMPv2c solved that.
I don't get the push to disable the default community strings, surely thats just security by obscurity so kinda worthless?
Also on the SNMP page there is a Community Configuration where you set the Management Station IP addresses. This doesn't seem to work as even though I only have my NAS IP in there, it responds to other clients on the LAN. At first I thought maybe this is only for SNMP Traps, but this is where you set the community string so surely not? I should probably check ReadOnly is beind obeyed.
Updating the firmware was next on my list though.
At least SNMP responds fairly quickly, unlike my ZyXEL Access Point where its pointless monitoring traffic as it takes several seconds to probe each value. Also not been able to find an MIB on that which reports link rate which is utterly stupid as that's the main piece of information you want to know.