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Connecting 3661 Router to 4006 Switch -Gigabit Port

I recently install a 4006 switch as my core switch. Everything is fine except for one thing. I got a 3661 router and when I connect (fast ethernet 0/0) it to one of the gigabit port it says that the port is connected but I couldnt ping the router. It comes up for about 5 minutes then drop.

In fact this router is the default gateway of the switch. I have connected a 1751 router and a 2522 router to this switch and it works fine.

Is there anything that I should enable on the switch end ?

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Re: Connecting 3661 Router to 4006 Switch -Gigabit Port

how did you handle the speed mismatch ?

New Member

Re: Connecting 3661 Router to 4006 Switch -Gigabit Port

Both end setup as auto. Speed and Duplex

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