Network cable limiting speed to 100Mb, please help

[solz]

Exact models below:

- Vumatel grey CPE, cant see model number due to where its mounted.
- HP Firefly G7
- HP Dock model : HSA Q001PR
- Router being bypassed for testing but its a Huawei WS 5200

Thanks for the help thus far all, appreciate the assitance.

Will try some more things tomorrow and report back here.

Okay great all you devices listed do2wzwsupport 1gbps.

So seeing that your lappy doesn't have a built in nic might also just double check that your laptop reports the nic when dock plugged in as gigabit or not.

If you also have other pc/lappy to test with builtin nic would also help eliminate you dock. But should be able to plug into your router as it's 10/100/1000 don't think it's needed to bypass it.

 

[Oj0]

Since he has already confirmed a 1Gbps connection using a different cable, I’m surprised how many people are still pointing at a different device.

I’ve seen many low quality cables unable to maintain higher speeds once you go past a few metres. Try making a short (say, a 3 metre) cable and see if that gets you a 1Gbps connection. If it does, make a NEW long cable (don’t just replace the connectors as the cable might be damaged) and see what speed you got. If you once again get 100Mbps, it’s rubbish cable and you should get something better. Maybe just buy a premade cable. If the issue does NOT affect the newly made cable, celebrate and discard the old cable.

 

[F1racer007]

I had similar issue with less than 30m run. Bit of paint on the connectors turned out to be the culprit. I'd start by cutting connectors and re-terminating. Did you use the through-hole EZ connectors or the regular one's? What class did you end up using for your cable, A or B?

EDIT: I am in CT and have spare connectors if you need some.

I am going to assume its the regular connectors, got some from a colleague and he had them for years in his box of things.

Also i believe i terminated using the class B based on google images.

Thanks @ Yasin, would not mind taking you up on that offer to test if it possibly the connectors.

 

[F1racer007]

Since he has already confirmed a 1Gbps connection using a different cable, I’m surprised how many people are still pointing at a different device.

I’ve seen many low quality cables unable to maintain higher speeds once you go past a few metres. Try making a short (say, a 3 metre) cable and see if that gets you a 1Gbps connection. If it does, make a NEW long cable (don’t just replace the connectors as the cable might be damaged) and see what speed you got. If you once again get 100Mbps, it’s rubbish cable and you should get something better. Maybe just buy a premade cable. If the issue does NOT affect the newly made cable, celebrate and discard the old cable.

I'm pretty sure its the cable yes, working from office today but will try the suggestion for a shorter cable and let you guys know if this works.

My suspicion is that's its a poor quality cable but will make a short one and see what the results show.

 

[Presler]

I'm going to ask the obvious question here, it's a bit unclear from your description and also seems like no-one else picked it up.

Is your connection running over a single length of 300m cat5e? Or did you use 300M cut to different lengths for various connections?

Cat5e max length should be 100M, and that's even pushing it, most network builders myself including will not go beyond 70m on cat5e, 100M on Cat6.

 

[SilentObserver]

Is no-one curious that OP is running three-HUNDRED meter cat5e cable?
Dude, cat5e should not run longer than 100m to get Gigabit speeds, you get signal degradation after that (explaining the 10/100 speeds)

If you're doing that I'd suggest either adding 2 small 5 port 1Gbps switches along the way, or gettin a fiber run pulled with adapters on either end.

Also I presume you have it crimped as T-856B on both ends?

Distance is the issue, not the laptop/ports.
(edit: Presler posted about distance while I was writing this one.)

 

[Presler]

Is no-one curious that OP is running three-HUNDRED meter cat5e cable?
Dude, cat5e should not run longer than 100m to get Gigabit speeds, you get signal degradation after that (explaining the 10/100 speeds)

If you're doing that I'd suggest either adding 2 small 5 port 1Gbps switches along the way, or gettin a fiber run pulled with adapters on either end.

Also I presume you have it crimped as T-856B on both ends?

Distance is the issue, not the laptop/ports.
(edit: Presler posted about distance while I was writing this one.)

Also curious that a no-one noticed

Yes, as pointed out, you should crimp in either T568A or T568B fashion, keeping with the correct color coding. Even A on 1 side and B on the other doesn't make a difference these days as modern LAN cards can identify crossover cables vs normal LAN cables.

 

[Oj0]

Is your connection running over a single length of 300m cat5e? Or did you use 300M cut to different lengths for various connections?

Is no-one curious that OP is running three-HUNDRED meter cat5e cable?

I assume it is just poorly worded. I interpreted it to mean he did all the cabling himself using a single 305m roll which was cut to length.

 

[PaladinLaw]

It's not often that I am humbled, but, I like to believe that when one is, one should take it on the cheek.

It is indeed looking more and more like it is in fact cable related (Which, honestly surprises me, as I have had some pretty shoddy cables / crimps still push gigabit, but hey, can't argue with the evidence.)

As others have suggested, you can try various things related to the cable.

Good luck, and let us know what you find.

 

[F1racer007]

Thanks to all that responded, to clarify it was a 305M cable that was cut to various lengths.

As Ojo's suggestion i cut a 2 metre cable and terminated and got full speed with this new cable

Decided to re-terminate the existing cable as a last measure and BOOM, FULL SPEED

Weird that cable tester showed all good but must have been poorly terminated or cable tester is crap.

Anyway happy that it working as intended now,

Thanks again guys,

 

[Yasin]

Thanks @ Yasin, would not mind taking you up on that offer to test if it possibly the connectors.

Didn't get chance to read rest of thread so not sure if you sorted already. If not, see PM.

 

[aiccc]

Weird that cable tester showed all good but must have been poorly terminated or cable tester is crap.

You probably had continuity tester versus a proper signal tester.


Glad it is sorted.

got some from a colleague and he had them for years in his box of things.

Any chance they were different connectors on either end

 

[Yasin]

This is proof that through-hole connectors are really worth the extra few cents. Assuming your connectors weren't covered in paint like mine lol. My cable tester (cheap one) always shows all good on main unit but faults show up on extension side.

 

[gilani777]

I had this eact same issue. When testing using a ethernet tester I found that one of the wires were not crimped properly. Like others have said, try redoing the termination

 

[Chris182]

Hi

I am based in CPT northern suburbs and work for a Cabeling company. I am more than willing to come check it out, should you need help. (On the weekend) We have proper fluke dsx testers that will pick up the fault.

IMO, it is highly unlikely to be the cable, even if it is aluminum copper coated you should get 1G on a short distance. If one of your crimps isn't done correctly the NIC will auto negotiate down to a 100mb.

If possible, try to use a branded name cable next time, like Molex, Krone, Meganet.

PM me if you need help.

 

[Senshi]

I had this exact same issue, I replaced the cable in the end with a Cat6a Shielded cable.

On cables running 30-40m (especially on the "cheaper" cables) they tend to degrade or suffer from EMI interference (electrical wires running in the roof or just generally bad quality cable).

My advice? Replace the cable (in my case I also did the initial install myself but then got a vendor out as I simply didn't have the time).

I'm not sure of anyone in CT that I can recommend, sorry.

 

[Senshi]

Thanks to all that responded, to clarify it was a 305M cable that was cut to various lengths.

As Ojo's suggestion i cut a 2 metre cable and terminated and got full speed with this new cable

Decided to re-terminate the existing cable as a last measure and BOOM, FULL SPEED

Weird that cable tester showed all good but must have been poorly terminated or cable tester is crap.

Anyway happy that it working as intended now,

Thanks again guys,

I really should learn to read further in the thread before I post, haha.

Glad you got sorted with a simple recrimp. Mine sadly was not that easy

 

[Scrooloose]

You're testing your local area network speed using internet speed test? That will never tell you what speed your LAN is operating at. You need to test against another cabled up device on the same physical network layer as your laptop, and then consider that Megabyte per second is not the same as Megabit per second - So choose your testing tool wisely and keep this in mind.

For testing the LAN, I'd select iPerf

iPerf - The TCP, UDP and SCTP network bandwidth measurement tool

 

[shifttymike]

I’m surprised that nobody has mentioned this, but 10/100 only uses 2 of the 4 pairs: the green and orange. If any of the brown or blue wires aren’t making contact, auto negotiation will fail for 1000base and you’ll fall back to 100.
You can literally remove the brown and blue pairs entirely and still have a solid 100mbps link.