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switch connected to

Posted on 2006-07-13
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Last Modified: 2010-03-19
Our cableling has got rather confused and i'm not sure which PC is connected to which switch. Is there an easy way to tell from the PC?
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Question by:jonhagger
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pseudocyber earned 125 total points
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No.  There is an easy way to tell from the switch, if they're managed - you can look at the forwarding table to identify which MAC is on which port.  If you have ARP tables available, you can use them to associate an IP address to a MAC address.

I take back my previous statement - on the PC, you could load a program which looks at the tables for you, so you can be looking "from the PC", but you're really reading the tables as I said.  SolarWinds has a cool one called Switch Port Mapper - http://www.solarwinds.net/Tools/Network_Discovery/Switch_Port_Mapper/index.htm

Or, from the pc side, you could attach a tone generator which puts a "musical" signal on a wire and then go to the other side with a probe.  The closer the probe gets to the wire, the louder it gets - this is the professional way to find wire.  

The hard way, is to trace it by hand.
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