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Cisco 3750x no ethernet connection

Hi,

I seems to have a weird problem whereby clients are unable to get an ethernet connection (Port no LED lit/not connected) when using mac.  Sometimes there is connection after multiple insert/disconnect using the same cable to the Mac client. This has also be tested with a direct connection between the client and switch (without going thru the backbone cabling). If I was to try using Windows client, there does not seems to have such issue.

 

Further observation; from the switch; if a shut and no shut was performed on the port connected to the client, it would cause the connection to be "UP". Not too sure if anyone may have seen similar issues of unable to get connection "UP"? The firmware on the switch is running 15.2(1)E2.

 

Any suggestion is appreciated.

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Hall of Fame Super Gold

You've got a 3750X?  Good.

You've got a 3750X?  Good.  This means you can test the cable run using TDR.  

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