Of course I checked cable and tuned up port to hard 100/full.
Google help me to understand, that problem is more complex than its looks.
There are problem with supervisor WS-X45-SUP7-E.
I found this article:
line cards stop responding to interface changes
Symptom: One or more line cards stop responding to interface changes and ports remain down/down (notconnect) when connected to hosts. Interfaces that are already in the link-up state are not affected.
Conditions: The problem only affects WS-X45-SUP7-E supervisors running 03.01.00.SG, 03.01.01.SG, 03.02.00.SG or 03.02.01.SG. The line cards that can be affected are in the WS-X46xx series and the WS-X47xx series. Earlier line cards are not affected.
Workaround: Upgrade to 3.2.5SG (3.2.2SG and higher has the fix).
Further information Avoid triggering the issue by eliminating link flap. If module < n> is already in the problem state: - reload the linecard module by doing 'hw-module module < n> reset'. OR - if you have dual supervisors, perform a switchover
In the initial post you mentioned that same interface is coming up when connected to the 2960 switch so i doubt that we are running in to this bug, however it can be confirmed if you may reload the module with 'hw-module module 1 reload' command.
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