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3550 Switch Ports Going Down

I am trying to help a friend so I have limited access. He says a few of the ports on his 3550 switch will just go down. Is there a feature built into these switches that cause ports to disable themselves and if so, what is the circumstances under which it will do so?

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Re: 3550 Switch Ports Going Down

The ports may experience error disabling:

http://www.cisco.com/en/US/products/hw/switches/ps5528/prod_installation_guide09186a0080450298.html

Other possibility is that your friend has been playing with port security...

Regards,

Leo

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