We help IT Professionals succeed at work.
Get Started

802.1x and RDP Issues

Last Modified: 2017-03-29
Hello everyone,

We recently deployed 802.1x authentication on our campus network. However there's a peculiar issue we are facing when RDP'ing into a machine. Basically the behavior is, RDP session connects fine, but the session freezes and kicks the machine off the network. Then I can no longer ping it or remote into it.

We setup a restricted VLAN where if 802.1x fails, it fails over to the internet only VLAN (2350). I noticed from the switch logs after the RDP attempt, the switch puts the machine into this VLAN. See below for switch logs:

166670: Jan 30 15:53:41.614: %DOT1X-5-FAIL: Authentication failed for client (Un                                                                                                 known MAC) on Interface Gi2/0/44 AuditSessionID C0A8110500020CBD2AF2EB70
166671: Jan 30 15:53:41.614: %AUTHMGR-7-RESULT: Authentication result 'no-respon                                                                                                 se' from 'dot1x' for client (Unknown MAC) on Interface Gi2/0/44 AuditSessionID C                                                                                                 0A8110500020CBD2AF2EB70
166672: Jan 30 15:53:41.614: %AUTHMGR-7-FAILOVER: Failing over from 'dot1x' for                                                                                                  client (Unknown MAC) on Interface Gi2/0/44 AuditSessionID C0A8110500020CBD2AF2EB                                                                                                 70
166673: Jan 30 15:53:41.614: %AUTHMGR-7-NOMOREMETHODS: Exhausted all authenticat                                                                                                 ion methods for client (Unknown MAC) on Interface Gi2/0/44 AuditSessionID C0A811                                                                                                 0500020CBD2AF2EB70
166674: Jan 30 15:53:41.614: %AUTHMGR-5-VLANASSIGN: VLAN 2350 assigned to Interf                                                                                                 ace Gi2/0/44 AuditSessionID C0A8110500020CBD2AF2EB70

Any ideas?
Watch Question
Network Engineer
This problem has been solved!
Unlock 3 Answers and 6 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE