Indicates whether the port security feature
is enabled on an interface. Upon setting this
object to 'true', the source MAC address that
does not match any cpsSecureMacAddress for the
given interface in cpsSecureMacAddressTable and
the value of cpsIfCurrentSecureMacAddrCount is
equal to cpsIfMaxSecureMacAddr, is considered
as port security violation and an action as
specified in cpsIfViolationAction is taken on
the interface. The value of this object has no
effect when the value of
cpsGlobalPortSecurityEnable is set to 'false'.