An entry in this table is created when the result of
a OAM ping probe is determined. The initial 2 instance
identifier index values identify the tmnxOamPingCtlEntry
that a OAM probe result (tmnxOamPingHistoryEntry) belongs
to. The tmnxOamPingHistoryIndex element selects a single OAM
probe result.
The agent starts assigning tmnxOamPingHistoryIndex values at 1
and wraps after exceeding the maximum possible value as defined by
the limit of this object.