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January 21st, 2020, 12:34 PM
#1
Network wall jack works fine until I plug in a switch
As the title states,
I have a situation wherein I am working at a local fire-station.
In one of the offices the network wall jack works fine until I plug in a switch.
Then none of the switch's ports give me internet.
I have tried a new switch and it gives the same results.
Any thoughts what could be causing this?
I am pulling my hair out with this one.
Thanks!
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January 21st, 2020, 01:09 PM
#2
What is on the other end of that wall jack? I am assuming that the other end of that cable goes to an Ethernet switch, or to a patch panel that has a cable that goes to a port on a switch.
Do you have other switches connected to wall jacks working successfully at this location? My guess would be no.
Some switches have special requirements for daisy chaining.
Possibly useful links:
https://www.dummies.com/programming/...work-switches/
https://www.techrepublic.com/blog/it...hain-switches/
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January 21st, 2020, 01:16 PM
#3
Post the make(s) and model(s) of the switches you are using.
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January 21st, 2020, 01:34 PM
#4
Thanks for the response JDC,
Other end of the wall jack is a simple 5 port unmanaged switch, then going to router then modem (So, yes other switches and routers work fine) The switches I tried are cheap tplink or netgear 5 port unmanaged switches.
Is it possible that the wall jack is wired in such a way that a cable plugged in works fine but a switch doesn't?
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January 21st, 2020, 03:04 PM
#5
Some switches require daisy chained switches to be connected to a specific port on the switches. You may want to check the user guides for the switches that you have.
Also, there are only 2 approved wiring sequences for network cables, 568-A and 568-B. Each cable must be wired the same on each end (568-A and 568-A or 568-B and 568-B) unless you want a crossover cable to connect 2 computers directly without a switch. If your cables are not using one of the 2 approved methods, there is no guarantee that they will work properly, especially for longer cable lengths. The cable should also be at least Category 5 and preferably Category 5e or better. Category 3 cable is not suitable for modern data transmission speeds.
Cable wiring info:
https://en.wikipedia.org/wiki/Category_5_cable
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January 22nd, 2020, 12:30 PM
#6
Originally Posted by jdc2000
Some switches require daisy chained switches to be connected to a specific port on the switches. You may want to check the user guides for the switches that you have.
Also, there are only 2 approved wiring sequences for network cables, 568-A and 568-B. Each cable must be wired the same on each end (568-A and 568-A or 568-B and 568-B) unless you want a crossover cable to connect 2 computers directly without a switch. If your cables are not using one of the 2 approved methods, there is no guarantee that they will work properly, especially for longer cable lengths. The cable should also be at least Category 5 and preferably Category 5e or better. Category 3 cable is not suitable for modern data transmission speeds.
Cable wiring info:
https://en.wikipedia.org/wiki/Category_5_cable
Thanks Much!
I'll take a look next time I'm out there.
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January 22nd, 2020, 12:57 PM
#7
The cable should have printing on it indicating what category it is rated for.
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