troubleshooting Question

802.1x and RDP Issues

Avatar of Richard Brodean
Richard Brodean asked on
Remote AccessSwitches / HubsWindows 7Network Security
6 Comments3 Solutions965 ViewsLast Modified:
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?
Network Engineer
Join our community to see this answer!
Unlock 3 Answers and 6 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 3 Answers and 6 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros