Indicates the 802.1x backend authentication state. Options: 1.request(1) -Indicates that 802.1x backend authentication state is request. 2.response(2) -Indicates that 802.1x backend authentication state is response. 3.success(3) -Indicates that 802.1x backend authentication state is success. 4.fail(4) -Indicates that 802.1x backend authentication state is fail. 5.timeout(5) -Indicates that 802.1x backend authentication state is timeout. 6.idle(6) -Indicates that 802.1x backend authentication state is idle. 7.initialize(7) -Indicates that 802.1x backend authentication state is initialize. 8.ignore(8) -Indicates that 802.1x backend authentication state is ignore. 9.invalid(-1) -Indicates the invalid state.