TP-link Deco speed drop when connected via 1gb network

[2013]

Could someone help I don't understand why but when my deco S4 Is connected via the network I get 93mbps speeds but when I connect directly via the virgin router I get 293mbps.

I'm using a tp-link TL-sg1024d

 

[2013]

Is it definitely connecting at 1gb?

I hope so, how do I check?

 

[2013]

Is the Deco being plugged straight into the Virgin Hub?
And if not, do you have switches in between and are they Gigabit?

Just having a quick guess it could either be that the cable is damaged causing it to sync at 100Mbps, or a switch your Deco is going through isn't gigabit (unless you're plugged straight into the Hub).

Ok ive tried both direct via VM router and cat6 rj45 faceplate which is connected to the switch.
via the router I get near my full VM speed but when I connect via the faceplate I get around 100mbps. Im using the same cable and the switch is a tp-link TL-sg1024d

 

[2013]

Sounds like the problem is with the cable run from the router to the faceplate. 100Mbps connections use 2 of the 4 pairs whilst gigabit needs all 4 pairs to be working. Check the terminations at both ends.

I dont completely understand but I assume you mean I need to connect 4 cables from the router to the rj45 which connect to the switch so the other rj45s can get gigabit ?

 

[2013]

ok, I get it, So ill need to check how the guy I hired to setup the network did this, hopefully, he used all four or at least he has not cut them off (huge problem if he did).

 

[2013]

It would be an extremely unusual thing to do to cut any of the wires out. Changes are it's just a bad termination. Can you get some photos of how the cable is terminated at both ends?

Thanks for the help here are some images https://prnt.sc/1qhtv63 https://prnt.sc/1qhtvlu https://prnt.sc/1qhtup7

Actually, it's worth confirming that the link is running at 100Mbps when using that cable. When you're connected via that cable check the properties of your network card and see what is shown for the link speed.

ill check that once im bak home

Deco S4 units are limited to 100 Meg. They cannot do gigabit speeds. S4 units are useless in today's world really.

Im not sure thats true https://prnt.sc/1qhtyzd

 

[2013]

Ok Ill try and get a better image asap

 

[2013]

According to this, have you tried updating the S4s to the latest firmware? Might be a firmware bug locking the ports to 100mb.

Could be I did recently update but it was a stable ver, Ive try again with router and im getting 300+.

The photos don't really help. Can you remove the plastic covers over the punchdown points, they should just pull off.

Which switch port is connected to that cable?

I have no Idea which port is connected to which as he did not add labels to it but he did send me a email which ill need to dig out
here is a new image https://prnt.sc/1qibxlr hope its better

**Update**

 

[2013]

Still not a good enough picture and we'd need to see the termination at both ends of the cable.

If you don't know which port that cable is going to, take a note of which ports are showing are showing a link when it's connected then disconnect the cable and check the ports again. The one that is no longer showing a link is the port in question.

Im afraid that is the best I can get as it does not have much cable to pull out


Here are the images ive took no4 is the deco s4 no6 is vm https://prnt.sc/1qie8rc https://prnt.sc/1qie88c https://prnt.sc/1qie778

 

[2013]

Deco s4 is 100meg

that's not what it says on the box https://prnt.sc/1qhtyzd and I'm getting 333 when I connect it directly to the router

 

[2013]

The modules unclip from the plastic faceplate. You should be able to get a better view if you unclip them.




So the Deco is on port 4? That's linking at 1Gbps so that's good. 6 is the VM router? That's linking at 100Mbps which isn't good.

I'm a bit confused about how things are connected. Any chance you can do a diagram, even something hand drawn wouild be good. I'm guessing that the switch is at one end of the cat 6 cable and the VM router at the other? I think that the VM router isn't physically next to the switch.

Is that right? If it is then it's a cabling problem as I suspected. You should be getting a 1Gbps link between the switch and the VM router.

yes the deco is on port 4 and VM is on port 6


I hope I can help resolve the confusion give me a min

 

[2013]

A bit of a mess but hope it helps https://prnt.sc/1qiogzb

 

[2013]

Yep, that makes sense I think. Is the switch upstairs or downstairs?

I still think the problem is with the cable that's running between the patch panel and the RJ45 sovcket that you couldn't get good photos of. Try to get pictures of both ends of that cable, so the terminations into the RJ45 socket and on the patch panel.

I know you've tried already, but try new patch lead at both ends.

at the bottom of the stairs, I'll try once I get a chance.

https://community.tp-link.com/en/home/forum/topic/270754?page=1

It seems people have been reporting link drop negotiation speeds across multiple TP-link routers that they have now started a thread about it , not sure why it was marked as resolved so quickly?

thanks

Do you have something else you can plug in where the TP-Link device is to rule out the cable run?

yes but its the same in them all unless its connected directly into the VM router, Im wondering if it could be the cable from the router to the rj45.

ill test that once I get home.

 

[2013]

after all that running about and scratching my head, it turned out to be the cable from the VM router.

 

[2013]

Excellent, a nice easy fix then.

Yeah, Well it would have been if that was the first thing I did.