This object indicates the last reset reason of the WPAN
RPL table associated with this given interface.
unknown (1) - unknown
manuallyClear (2) - RPL table was manually cleared
configChange (3) - WPAN configuration changed
interfaceDown (4) - WPAN interface was down
timeout (5) - RPL table has not been updated for
a long time
serviceStop (6) - WPAN service has stopped