Please see my log message below. Note that the user section is blank. Is there a reason why this would be left blank? As a side note I am currently running radius on my network if that makes any difference.
Feb 21 19:57:47.898: %SEC_LOGIN-4-LOGIN_FAILED: Login failed [user: ] [Source: x.x.x.x] [localport: 22] [Reason: Login Authentication Failed] at 13:57:47 CST Wed Feb 21 2018
I am doing this through console which is why the source is unknown. The login success messages come through with the user just fine. From what I have read this is a bug that has been around for a while. I wonder if anyone has found a fix or if Cisco is ever going to bother with fixing this.
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