Ethernet Speed not going above 100Mbps with Jiofiber router

MysticUwU

MysticUwU

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I have standard jiofiber router, JCOW411.
With it's LAN port i can't get more than 100Mbps.
These are the things i tried-
- Used all ports
- Tried Linux as well as Windows Computers
- Tried 4 cables, (5e,6) (got it checked with cable tester)
- Updated drivers of pc
Nothing worked.
- Manually selected 1Gbps from settings in both OS, in both it didn't connect after that, Auto option selects 100mbps.

I was able to get 400Mbps via 5Ghz using my phone with USB tethering in my PC.
But with ethernet the link speed are only coming at 100mbps.
 
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The port on router would not be a gigabit port. You can check if there are only 4 pins out of 8, they will definitely not be gigabit ports and will have a speed limit of 100mbps.

You mostly need a router replacement.

Someone here facing the same problem.
 
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Typhon said:
The port on router would not be gigabit ports. You can check if there are only 4 pins out of 8, they will definitely not be gigabit ports and will have a speed limit of 100mbps.

You mostly need a router replacement.

Someone here facing the same problem.
Click to expand...
I just checked, They do have 8 pins.
IMG_20250425_183842.jpg
 
I am taking a lot liberties by assuming your ignorance, but still, my 2 cents.

If it is not the router, it could be the drivers or software. Did you try any recent computers? Linux can be notorious when it comes to ethernet connections. If you do have the chance, connect the cable to a recent comptuer, laptop, or a mini pc and check. Also while doing the ethernet test, check your network adapter in the device manager - it may be set to 100/100.

Like @superczar said, it seems like a limitation set somewhere, rather than a fault. You could also try connecting two PCs to two ports and transfer files between them to see if it is a hardware limitations. Many companies skimp on ethernet ports in a lot of devices these days.
 
superczar said:
check the model number and look up the specs maybe?
this does seem like a port hardware limitation
Click to expand...
There is a subset of people with the same router who get above 100mbps and some that don't. Maybe there are revisions within the same model with previous ones not supporting gigabit, or older firmware maybe?
 
Aashish.007 said:
There is a subset of people with the same router who get above 100mbps and some that don't. Maybe there are revisions within the same model with previous ones not supporting gigabit, or older firmware maybe?
Click to expand...
Usually firmware will not impact the port speed


relatively easy to check though
Connect any of the lan ports directly over a known good cable to a PC and check the negotiated PHY link speed
 
soulweaver said:
I am taking a lot liberties by assuming your ignorance, but still, my 2 cents.

If it is not the router, it could be the drivers or software. Did you try any recent computers? Linux can be notorious when it comes to ethernet connections. If you do have the chance, connect the cable to a recent comptuer, laptop, or a mini pc and check. Also while doing the ethernet test, check your network adapter in the device manager - it may be set to 100/100.

Like @superczar said, it seems like a limitation set somewhere, rather than a fault. You could also try connecting two PCs to two ports and transfer files between them to see if it is a hardware limitations. Many companies skimp on ethernet ports in a lot of devices these days.
Click to expand...
I tried with Windows 11, Arch and ubuntu.
All pcs were different.
With file sharing too the speed is 10-11MBps which is ~100Mbps.

Aashish.007 said:
There is a subset of people with the same router who get above 100mbps and some that don't. Maybe there are revisions within the same model with previous ones not supporting gigabit, or older firmware maybe?
Click to expand...
yea, that making me confuse, most people are getting 1Gbps but mine isn't.
I'll see firmware version and share
 
Dont know if this will work but worth a try: Device Manager -> Network adapters -> LAN controller(Realtek from me, can be different) -> properties -> Advanced tab -> Turn off energy efficient ethernet and change speed and duplex from auto negotiation to max value(You can see here if your system supports gigabit connections, choose full duplex option).

This fixed things for me when I was facing a similar issue with college LAN.
 
Have you tried changing the cable? Cat5e or Cat6 can be tricky to crimp. I was facing the exact same issue and it was a bad crimp/oxidised connector. I would recommend changing the cable or using a small patch cable to see if the fault lies with the cable.

Further, check your network settings to see if your hardware is being capped at 100mbps.
 
sibot said:
Have you tried changing the cable?
Click to expand...
He said he has already tested the cables with cable tester.


soulweaver said:
You could also try connecting two PCs to two ports and transfer files between them
Click to expand...
This needs a crossover cable, doesn't work with normally crimped cables. Or you need a gigabit switch. (And in both cases need to assign IPs to interfaces manually. Not as easy as plugging two ends into two computers).

I would say raise the issue with Jio support, and say that speed is limited to 100mb/s on PC/Laptop connected via LAN.
 
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