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New Member

Problem with switch 3750 port

I am having connectivity issue with 3750 switch ports.After connecting cables to the switch port the port will not turn on meanwhile other ports are working fine.I tried to do no shut,speed auto,duplex auto but nothing good.Does somebody have any idea?

10 REPLIES

Re: Problem with switch 3750 port

Hi,

Did you try with another network adapter?

Best regards.

Massimiliano.

New Member

Re: Problem with switch 3750 port

Yes but still the same problem

New Member

Re: Problem with switch 3750 port

What is the port state. please paste "show int XXX" here.

It could be anything from duplex\speed mismatch to STP or other side failure.

New Member

Re: Problem with switch 3750 port

Here is the output of sh int Gigabitethernet 1/0/1

The file is attached

Purple

Re: Problem with switch 3750 port

You are using straight thru cables on all ports correct . Also if you left auto-mdix on , then all ports should be left as auto for speed and duplex. Also check in the logs and make sure the ports are not err-disabling for some reason .

New Member

Re: Problem with switch 3750 port

Please Check Cabling end to end and Cable is Connected through P.O.E or Direct.

Please check P.O.E Power and switch port.

And Serial port status whether it is showing any Alerts or Alarms.

satya

New Member

Re: Problem with switch 3750 port

only 4 ports are having problem the rest are functionning normaly.After a factory reset on the switch the problem persists.The cables are staight through and good.

New Member

Re: Problem with switch 3750 port

When i press the mode button and the system,master and stack leds are solid green,port 1 starts flashing green and ports 23 and 24 are solid orange.But after a minute system,master and stat leds are are solid green

Purple

Re: Problem with switch 3750 port

check to make sure you don't have a loop in your cableing and spanning tree is blocking those ports for some reason . Do a show spanning blocked ports command.

New Member

Re: Problem with switch 3750 port

No spanning tree instance exists on the switch.

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