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Forum Discussion
lucas_m
Feb 09, 2022Star
GS305 Switch capping at 100mbps
I recently bought a little, un-managed switch for a simple use case. There is a first cable (CAT6, like all the others cable I will speak about) going from my Internet Router into the 5th port of th...
- Feb 10, 2022
Climp them off and recrimp on new ones. all it takes is one pin to be bad/sketchy to cause issues.
Its not usually the cable that's bad.
plemans
Feb 10, 2022Guru - Experienced User
i would be checking the cable supplying the switch. Many times a sketchy cable will drop speeds from gigabit to 10/100mbps.
So start with replacing the ethernet cables.
- lucas_mFeb 10, 2022Star
Thanks for you answer.
The cable are ran through wall, so it's not that easy to replace. The switch is almost sealed in an eletric box, not easy to access too. I sincerely doubt the problem being the cable, if it was, the main cable, from the router, would be the bottleneck, but it has been working for like 10 days, and as I said, it is "sealed" into the wall.
- plemansFeb 10, 2022Guru - Experienced User
lucas_m wrote:
Thanks for you answer.
The cable are ran through wall, so it's not that easy to replace.----many times its not about replacement. Most of the time I've found a bad connector/pin on them. It only takes 1 pin to be bad/not connected properly to cause one of the pairs not to link and drop it to a 10/100mbps connection and not gigabit. The switch is almost sealed in an eletric box, not easy to access too---might not be easy access but to test the cable or switch being the problem, you might need to remove it and move it next to the router. Use known good 6 ft cables to test it. . I sincerely doubt the problem being the cable, if it was, the main cable, from the router, would be the bottleneck, but it has been working for like 10 days, and as I said, it is "sealed" into the wall. ---so how do you propose testing it? You can either pull it out of the wall and put it next to the router and test with known good cables. Or you can buy a new one (which would mean taking the old one out anyway) and testing a new one. support isn't going to replace it without you doing *some* testing.
- lucas_mFeb 10, 2022Star
Knowing I needed to test the cable, I moved my computer next to the switch and performed a series of test.
To be even more clear, there is a first CAT-6 cable, running from the router into a RJ45 mural-plug. Then this plug is connected to a second cat6 cable, which is then plugged into the switch, as the network "input".
I tested the bandwidth of this "second" cable (the one acting as my switch input) -> bandwidth was 950mbps.
We can eliminate the input being the problem.
I then replugged the input into my switch, and performed another test : I plugged a CONFIRMED WORKING cat6 cable from one output of the switch into my computer, and the bandwidth dropped to 100mbps
Correct me if I'm wrong, but we can easily conclude from these 2 tests that the switch is, in fact, the problem
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