How can I use snmp to check the kb/s traffic of an interface in mt? the oid of 10 & 16 is supposedly bytes in & out but this seems to be an ever incrementing value, and not a per second value? This seems like others would have asked before but I couldnt find any references on the forums?
I think you can create queue without limitation, that is dedicated to certain interface traffic. Monitor this queue statistic, if you want to use remote SNMP monitoring.
Subtract the previous recorded query of bytes in/out from the current SNMP read of those values. Then divide it by the time interval in seconds to get bytes per second. You should be able to make a little script to do this which mrtg can call if you are using mrtg.