Description: Prior to version 2.0, this object has one of the following values: - the value of xtmClassName for the parent class in the hierarchy, - the value 'interface' if the class is directly under the interface, which is the root of the tree, or - the value 'orphan' if the class is defined but not yet inserted into the tree.

Software version 2.0 and greater introduced traffic classification on both input and output. The value of this object has one of the following values: - the value of xtmClassName for the parent class in the hierarchy, - the value 'input' if the class is the root of the input classification tree, - the value 'output' if the class is the root of the output classification tree, or - the value 'orphan' if the class is defined but not yet inserted into the tree.

If a parent name is specified, the row cannot become active (have its xtmClassRowStatus set to 'active(1)' unless the parent is valid and is itself active.

Note that an interface may have several traffic classes with an xtmClassParent of 'interface'.

Note also that an 'orphan' class cannot become 'active(1)' - it must first have a valid parent specified.