port disabled

BigK — Tue, 26 Feb 2019 22:56:46 GMT

I have this issue and could not figure out why it is happening

sho int Gi4/0/16
GigabitEthernet4/0/16 is down, line protocol is down (err-disabled)

switch log

Feb 26 12:25:33.129: %PM-4-ERR_DISABLE: security-violation error detected on Gi4/0/16, putting Gi4/0/16 in err-disable state
Feb 26 12:25:33.133: %AUTHMGR-5-SECURITY_VIOLATION: Security violation on the interface GigabitEthernet4/0/16, new MAC address (9890.96c2.2eed) is seen.AuditSessionID Unassigned
Feb 26 12:25:34.130: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet4/0/16, changed state to down

Re: port disabled

ognyan.totev — Wed, 27 Feb 2019 05:50:47 GMT

Hi,please shut the port than on the port type no switchport port-security and no shut the port.

Mohammed al Baqari — Wed, 27 Feb 2019 06:13:26 GMT

Hi,

Can you try the command 'authentication mac-move permit'?

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socratesp1980 — Wed, 27 Feb 2019 06:54:30 GMT

I had the same issue where I was doing dot1x for an endpoint where was behind an IP phone. My workaround is to add:

authentication violation replace