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uplinking a switch

Posted on 2006-07-12
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Wehn uplinking a switch from one port in one switch to the uplink port in another, should a straight through or a crossover cable be used?
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Question by:Sid_F
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8 Comments
 
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by:fuzzysb
ID: 17089615
that depends if the switches port is an autodetect MDI/MDI-X port, if not you will need to use a crossover, but most SOHO switches/routers will autodetect this so you can use a straight cable. but a lot of managed switches ala cisco or HP will not so you will need a crossover cable.
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by:jcdesign4u
ID: 17089730
You must use a  straight through cable.
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by:RPPreacher
ID: 17089897
Switch to switch is crossover (fuzzysb is right, jcdesign4u is wrong) unless the switchport is MDI/MDI-X port
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by:foochar
ID: 17089945
If you are using a normal port in one switch and an uplink port in the second switch then you are going to want a straight through cable in most cases.  The uplink port on most SOHO switches is MDI-X port so that you don't need a crossover cable to make the connection.

On many newer SOHO switches the ports are auto MDI/MDI-X so the cables really don't matter that much since the swtiches will figure it out for themselves.
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by:Steve Knight
ID: 17090836
So in summary : either, it depends - the little green light or lack of each end is a good clue :-)

(Agree, always traditionally need a crossover unless one switch has an option for MDI-X (which effectively is just a built-in crossover of the wires on one port) or is auto MDI/MDI-X which means each port automatically sorts it out...)

Steve
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by:NAORC
ID: 17091156
Tell ya what... post the model names of the two switches, and we'll give you a straight one work yes or no answer.
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by:Sid_F
ID: 17216415
Net gear FS516 It has auto uplink on port 16 so maybe strandard cat 5 is fine.  But for future if there is no uplink port should I use cross over or standard.

Thanks
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Accepted Solution

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foochar earned 500 total points
ID: 17216591
With the uplink port standard cat5 is what you want to use, just don't connect to an uplink port on the second switch.  

The only time you need a crossover cable these days is if you are going from a standard port without auto MDI/MDIX capability to another standard port without auto MDI/MDIX capablitiy.
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