Walking whole MIB
*****************

17. The nextCmd() and bulkCmd() methods of CommandGenerator app
    (oneliner version) stop working once returned OIDs went out of
    scope of request OIDs.

    In other words, if I request 1.3.6.1, I would get everything under
    the 1.3.6.1 prefix, but not 1.3.6.2.  Is there any way to make it
    walking the whole MIB?

1. Yes, just pass the lexicographicMode=True parameter to
   CommandGenerator nextCmd() and bulkCmd() methods (introduced in
   PySNMP 4.2.3+) or set CommandGenerator.lexicographicMode=True
   option before calling nextCmd() and bulkCmd() methods.

   cmdGen = cmdgen.CommandGenerator()
   errorIndication, errorStatus, errorIndex, varBindTable = cmdGen.bulkCmd(
       ....,
       ....,
       ....,
       lexicographicMode=True
   )
