Half duplex and full duplex

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Jul 7th, 2008
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I have connected cisco 7500 router with a cisco switch 2950. The problem i am facing is that we can't running the link with full duplex . The cisco switch is supporting 100 Mbps, 100Base TX and the Router FastEthernet support 100Mbps, 100Base TX/FX

When I enable the link as full duplex the Switch interface(which is coneccted) is goes down. pls help me.



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mahmoodmkl Mon, 07/07/2008 - 00:15
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have u enabled the full duplex on the switch side.

can u try auto.

Check for the cable used for this connection.



Kevin Dorrell Mon, 07/07/2008 - 01:23
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The best way is to make both sides of the connection auto, for both speed and duplex. That way it should negotiate full-duplex.

If, OTOH, you configure full duplex on the router, then you should configure full duplex on the switch as well.

If you configure full duplex on one side, and auto on the other, it will give you all sorts of problems.

Kevin Dorrell



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