Why is it some of my wireless devices use iso.org.dod.internet.mgmt.mib-2.interfaces.ifTable.ifEntry.ifSpeed.1 while others use iso.org.dod.internet.mgmt.mib-2.interfaces.ifTable.ifEntry.ifSpeed.2 or even .3? These devices only have 1 ethernet port.

Some devices will show a .2 and a .3 for example with the same values. Which one should I be using to monitor for 100BaseT or Gigabit?

Show the ifTable.ifEntry.ifDescr for the same .1, .2, or .3 indexes to find out what RouterOS is showing you.

Thanks! I get it now, one of the interfaces belongs to the bridge.