The value of tmnxOspfAreaLoopfreeAltExclude specifies whether or not
the OSPF area should be excluded during LFA calculations. If the value
is 'true', the OSPF area is excluded from LFA calculations. If the
value is 'false', the OSPF area is included in LFA calculations.
The value of tmnxOspfAreaLoopfreeAltExclude is only valid when
tmnxOspfLoopfreeAlternate has a value of 'true'.