This object indicates the interface mode regarding
SVI autostate feature. This object only takes effect if
the value of csaFeatureEnable object is 'true'.
'normal' indicates that when SVI autostate feature is
enabled, this interface will participate normally
in the autostate calculation of the SVI which it
associates.
'exclude' indicates that when SVI autostate feature is
enabled, this interface will be excluded from the autostate
calculation of the SVI which it associates.
'track' indicates that when SVI autostate feature is
enabled, this interface will be tracked in the autostate
calculation of the tracked SVI which it associates. If all
tracked interfaces of this SVI go down, the corresponding
SVI goes down.