Router has gigabit ports but im not getting gigabit speeds

[code99]

So long story short, my ISP sent me a new router with wifi 6 and gigabit ports.

 

I've installed and configured it. Everything works fine. 

I have a 1Gigabit fiber optic connection.

 

On port 1 of the router, im getting the proper gigabit speed.

On other ports im not. Im only getting ~100Mbps

 

As far as i know all lan ports on this router should be gigabit. It says on the box and on the manufacturer page.

 

The router in question is a TP Link AX1500 Wi-Fi 6 Router

 

I have 2 pcs connected to it, both pcs have gigabit capable motherboards and proper drivers. 1 pc is connected to lan 1 and has gigabit, the other is connected to lan 2 and doesnt have gigabit.

 

Do i have to do something else to make this work? What could be the issue? Is it the cable?

[GorujoCY]

are all the cables either CAT 6 or 7 Ethernet cable or better?

[RockSolid1106]

Go into Settings(Windows Settings, Win + I)>Network and Internet>Ethernet, and in the Properties section, what do you see as the link speed? To get Gigabit, it should be at least 1000/1000Mbps

 

Edited July 26, 2021 by RockSolid1106
Added the picture

[RockSolid1106]

4 minutes ago, GorujoCY said:

are all the cables either CAT 6 or 7 Ethernet cable or better?

AFAIK, CAT5E too supports Gigabit

[GorujoCY]

Just now, RockSolid1106 said:

AFAIK, CAT5E too supports Gigabit

yeah cat5E should work too...

[code99]

5 minutes ago, RockSolid1106 said:

Go into Settings(Windows Settings, Win + I)>Network and Internet>Ethernet, and in the Properties section, what do you see as the link speed? To get Gigabit, it should be at least 1000/1000Mbps

On my main pc, it says 1000/1000Mbps

 

On the second pc it says 100/100Mbps

 

I also tried the other ports with my main pc, all ports are indeed gigabit

 

So its something with the second pc or the cable. No idea what type of cable it is tho

[code99]

I just checked and on the cable itself it says "CAT5E"

 

But the connectors were wired by a friend a few years back ... maybe he wired them wrong?

[DigitalGoat]

2 minutes ago, code99 said:

I just checked and on the cable itself it says "CAT5E"

 

But the connectors were wired by a friend a few years back ... maybe he wired them wrong?

Simple test, swap cables to check, if all hardware is gigabit capable and all settings are correct but speed is wrong then cable is most likely the suspect, whether wired incorrectly or a split/ frayed wire.

[Lurick]

16 minutes ago, code99 said:

I just checked and on the cable itself it says "CAT5E"

 

But the connectors were wired by a friend a few years back ... maybe he wired them wrong?

Gigabit requires all 4 pairs (8 wires) to be connected to function at gigabit speeds. If one wire isn't crimped properly on either end or a pair is incorrectly wired on one end then you drop to 100Mb instead

[HanZie82]

And also, for gigabit to work both ends need to support it, as does the cable. (Cat5E and up)

[SupaKomputa]

Swap the cable, if working then problem is the connector.

If not working you go to your adapter settings, advance tab, Speed & Duplex, set it to 1gbps full duplex.

[Lurick]

34 minutes ago, RockSolid1106 said:

AFAIK, CAT5E too supports Gigabit

Cat5E, Cat6, Cat6a and Cat8.1 or Cat8.2 will all support gigabit and 2.5GbE up to 100m

Cat6 will support 10G up to 55m or 5G and below up to 100m

Cat6a will support 10G and below up to 100m

Cat8.1 will support 25GbE up to 30m

Cat8.2 will support 40GBE up to 30m

 

Cat7 isn't a recognized standard and calls for TERA connectors which are not compatible with RJ-45, therefor anything advertised as Cat7 is a lie.

[HanZie82]

Also make sure there is no dirt in the connectors. Its rare but can happen.

[FloRolf]

On 7/26/2021 at 4:42 PM, code99 said:

On port 1 of the router, im getting the proper gigabit speed.

On other ports im not. Im only getting ~100Mbps

Have you solved it yet? Because in my router (different model/manufacturer than yours) there's this dumb ass "green mode" which limits individual ports to 100mbit instead of GBit. 

[mariushm]

Also, it's rare but not unheard of. 

Look inside the connector on the computer or laptop with your eyes and make sure all those 8 pins are sitting properly in their "channels" and they have flexibility when you touch them. There's 8  "pins" inside a connector and they're like springs, they're designed to bend and raise like a spring when you insert the network jack in the connector. Sometimes when you insert a jack, one of those pins bends down too much and hops over the separator and stays in contact with another pin, creating a short.... or sometimes they don't snap back to make contact with the jack  

 

You can use a needle or some tweezers to individually test each contact inside the connector and to reposition it if needed. 

 

Also check the cable and the wire order, it does matter for 1 gbps speeds. Also make sure the actual "blades" inside the ethernet plug / jack are biting into the wires. Sometimes the blades loosen over time and no longer make good contact with the wire inside the jack.

 

Both ends of the cable should have the wires in the order listed below (either version is fine, as long as same version is used on both ends): 

 

 

A cable that has first version on one end and the other version on the other end would be called a crossover cable for 100 mbps or lower ethernet cards. It's basically a cable that could be used to make a direct connection between two computers (two network cards), without a network hub or a switch between them. 

 

Only 100 mbps (and lower) network cards need this, and only 4 wires are changed on one end because 100 mbps network cards only use 4 wires in the cable (first 3 and the 6th). The 4th and 5th were sometimes used in offices as phone line to a person's desk, to skip on buying dedicated phone cable and 7th and 8th were often unused,

 

1 gbps network cards will auto detect that there's a direct connection between two cards and auto arrange the wires internally to make it work, so crossover cable doesn't need to be used.  A crossover cable could actually confuse them, because gigabit needs all 8 wires to work, so a crossover cable would only have half of its cable flipped and that's not right.