在使用vWLC与ISE1.4进行802.1x认证时出现问题。ISE出错消息：
Authentication Details
| Source Timestamp | 2015-XX-XX 15:28:16.044 |
| Received Timestamp | 2015-XX-XX 15:28:16.044 |
| Policy Server | ise14 |
| Event | 5440 Endpoint abandoned EAP session and started new |
| Failure Reason | 5440 Endpoint abandoned EAP session and started new |
| Resolution | Verify known NAD or supplicant issues and published bugs. Verify NAD and supplicant configuration. |
| Root cause | Endpoint started new authentication while previous is still in progress. Most probable that supplicant on that endpoint stopped conducting the previous authentication and started the new one. Closing the previous authentication. |
客户端使用无线卡线连接时，可以弹出认证界面。在输入用户名和密码后连接不上（DHCP地址没问题）。感觉认证失败应该是ISE在与客户端进行EAP认证过程时客户端中断了当前会话而发起了另一次认证会话。
网上参考观点：
My guess is that this is the result of Windows behaviour. This generates a couple of "failed" authentications that in our case just confuse the costumer. I know this isn't an answer on your question, just my experience with the problem.
Possibly a Bug CSCui21439
求问题原因和解决方案。
