Auto MDI/MDI-X + conference rooms + bored == loop

John Payne john at
Mon Apr 5 07:30:58 CDT 2010

On Mar 26, 2010, at 9:24 PM, Mark Foster <blakjak at> wrote:

>> or reboot is problematic in many cases.  Many systems drop link- 
>> state during reboot for a long-enough period that the bridge-port  
>> restarts its spanning tree process, making results across reboots  
>> consistently bad.
> Interesting; Windows tends to bring link up well-prior to the login  
> dialogue and ive never seen a dhcp lease fail such that the user has  
> had no lease by the time they try to login...

Easy to make happen with 802.1X, default IOS timers and an  
unconfigured supplicant

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