Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection

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Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-07 15:52:58 - last edited 2019-06-07 21:57:52
Model: TL-SG105E  
Hardware Version: V3
Firmware Version: 1.0.0 Build 20160715 Rel.38605

So I have the network of my house just like this:

Where Switch 1 is a SG105E V3 and Switch 2 is a SG105 and cables are category 5. THe thing is that the Deco TV needs IGMP snooping to work correctly, and as I have the network right now it does work. The problem is that  the 1000Mbps connection I have in PC1 and Access Point 1 doesnt reach Access Point 2. And if I force the link to be 1000Mbps in the Easy Smart configuration the link just goes down and when restarted it goes orange meaning that its 100Mbps again.

 

It's port 3

 

 

So what is happening?

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#1
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7 Reply
Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 09:11:42 - last edited 2019-06-08 09:13:02

19mikel95 wrote

 

So what is happening?

 

I guess that it is a bad cable. I see the same effect with my TL-SG108E/SG105E when using an UTP cable. Make sure to use a proper shielded CAT.5e S/FTP cable and shielded RJ45 plugs.

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#2
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Re:Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 10:20:52

It says its CAT5 UTP, so it might be a faulty cable? Is there any way to asure that its the cable? because it is a difficult to change cable, due to the fact that it goes through walls, so before calling someone to change it, to be sure of it.

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#3
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Re:Re:Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 11:45:15 - last edited 2019-06-08 11:46:44

19mikel95 wrote

It says its CAT5 UTP, so it might be a faulty cable? Is there any way to asure that its the cable?

 

Definitely. UTP means »unshielded twisted pair« and this type of cable is not able to transfer 1000 Mbps. As for a quick test, just disconnect the switch from the installed cable, connect it to the other switch using any shielded patch cable you have available and you will see that the switches negotiate to 1000 Mbps.

 

If this helps to solve your problem, please mark my previous posting as best solution in order to help others with the same problem. Thanks!

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Re:Re:Re:Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 11:53:09 - last edited 2019-06-08 11:53:22

But the other cables are also UDP  and I get 1000Mbps in PC1 for example

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Re:Re:Re:Re:Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 12:01:49 - last edited 2019-06-08 12:04:55

19mikel95 wrote

But the other cables are also UDP  and I get 1000Mbps in PC1 for example

 

If it is a short UTP cable, it might work unless it's a very cheap and crappy cable. If it is a long UTP cable and/or placed in a cable duct near power cables, problems will arise. It even might sometimes work and sometimes not, depending on interference. In theory, CAT.5 UTP cables should work even with 1000 Mbps, but in practice they often cause problems. That's why the standardization organisation did introduce the CAT.5e (extended) category and why most Gigabit cables are shielded in those days.

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#6
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Re:Re:Re:Re:Re:Re:Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 12:04:27

Ok thanks so I just buy CAT 6 FTP and change it?

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#7
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Re: Connecting a SG105E to SG105 doesnt allow me a 1000Mbps connection
2019-06-08 12:07:36 - last edited 2019-06-08 12:36:26

19mikel95 wrote

Ok thanks so I just buy CAT 6 FTP and change it?

 

If you plan to use 10 Gbps in the future, use CAT.6 or even better CAT.7. Otherwise for 1 Gbps use CAT.5e FTP, STP or S/FTP; they fit perfectly.

 

This is one of my patch cables for connecting TP-Link switches and other devices. As you can see, I carefully shield even the plugs. However, those UC900 cables are somewhat expensive, but they work perfectly.

 

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#8
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