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Cisco Bug: CSCvj07550 - C4500-Sup8 - Sending authentications for disconnected device behind IP phone

Last Modified

May 21, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

3.9(0.0)

Description (partial)

Symptom:
Seeing failed MAB authentications constantly in ISE for a device that is configured for 802.1x.  The device is not physically connected to the switch.

Conditions:
3.9.1 or 3.9.2 code.

PC was connected behind a 7970 and completed 802.1x and then disconnected the PC.
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