C2 LAN Type.
The data frame format which this client will use the
next time it returns to the Initial State.
Auto-configuring clients use this parameter in their
Configure requests. Manually-configured clients use
it in their Join requests.
This MIB object will not be overwritten with the new
value from a LE_{JOIN,CONFIGURE}_RESPONSE. Instead,
atmLecActualLanType will be.