This object is used to set the APS mode on the
corresponding interface referenced by ifIndex object.
The value linear(1) is the APS mode of linear 1+1
nonreverting and unidirectional. This only
true APS mode supported in cisco6400 at FCS.
The value yCable(2) is providing the port hardware
redundancy but not transmission line redundancy and
is not strictly an APS mode.