Question Does having unused Ethernet cables hooked into managed switch hurt performance?

Wavve31

Junior Member
Dec 16, 2018
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#1
Hi. I have a brand new house where each room was pre wired with cat 6 Ethernet. Im only using 4 lines out of 12 at the momen. But all lines are currently hooked into a Cisco unmanaged switch. Will the unused Ethernet connections possibly hurt network performance?
 
Nov 4, 2004
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#2
No.

Are you having performance issues? Or just wondering?
 
Feb 25, 2011
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#3
Agreed. No.

It's not really plugged in until there's something at the other end of the wire to complete the circuit.

You can see on the switch which ports have their link/act lights blinking.
 

13Gigatons

Diamond Member
Apr 19, 2005
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#5
Unused ports usually get turned off or put into sleep mode.
 

mv2devnull

Golden Member
Apr 13, 2010
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#6
As said, no. No active device at the other end of cable equals no cable at all.


Lets imagine different scenario. 48-port switch. Each port connected to a PC that is on. Only two PC's talk with each other just now.

Does that "hurt performance"? No.

Okay. 24 of the PC's talk to the other 24. All 48 ports active, 24 pairs of peer-to-peer communication.
Does that hurt? No. Quality switch is made for that.
 

Hi-Fi Man

Senior member
Oct 19, 2013
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#7
It's not a coaxial or SCSI connection where you need terminators to avoid reflections. The ports are independent from one another and are shut off at the switch when not in use.
 
Nov 2, 2009
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#8
If this is a managed switch that is unmanaged, why not start managing it and shut down the ports that are not being used if you are suspicious?
 


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