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Forum Discussion
Linked Speed limited to 100M between router and switch
Hello,
I have a problem with my GS308E switch that I've had for almost 2 years.
I use it in my living room to connect an Apple TV and a PS5. I noticed yesterday that my connection was not stable with my PS5.
So I decided to factory reset my switch to see if the problem disappeared. It seems that the connection is now stable, but the connection between my switch and my router is blocked at 100M.
My installation is a bit complicated: my box is in an office, from which an Ethernet cable runs to a wall socket. The Internet cable in the wall then runs to an electrical panel. In this panel, I have an Ethernet cable that links the cable coming from the office to the one going to the living room. In the living room, an Ethernet cable from a wall socket to the switch.
I've tried lots of different things:
- Using another port on the switch: same problem, so not a port problem.
- Using different Ethernet cables throughout my installation, of different categories: same problem, so not a cable problem.
- Connecting the Apple TV directly to the switch: 925Mbps, so the connection seems to be stable and work fine in this case.
- Connecting the switch to the electrical panel or directly to my router: no problem in this case, 1000M.
- Connecting the switch in place of the router in the office and the Apple TV in my living room (in the opposite direction): no problem, 1000M.
- Switch firmware update
- Multiple switch reboots
I'm completely baffled by all these tests, there's nothing coherent about them. I have the impression that my switch no longer likes this long path between it and the router.
Do you have any ideas?
Thanks !
7 Replies
If I read the description correctly, there are two in-house cable runs, both of which terminate in RJ45 jacks at each end.
My suggestion is to invest $20US on a 100ft Cat 6 Ethernet cable (Amazon). This can be used to bypass either (or both) of the in-house cable runs to see if one of them is responsible. Often a jack is not terminated perfectly and may have lost a connection over time.
The single biggest difference between 100M Ethernet and 1000M Ethernet is that 100M requires only two pairs of wire and 1000M requires all four pairs. Even a single loose wire anywhere along the connection path can cause the devices on each end to drop to 100M.
Yes, I have 2 in-house cables, linked with a small external RJ45 in my electrical panel. This is the weird part of my story. I've already tried bypassing them one by one from my electrical panel and the results are... random. I just don't get it...
And my Apple TV has the maximum speed through the same path.Thanks for your help anyway!
Additional information: the switch seems to be in 1000M at the beginning, the two green lights flash, then go out 2 times and then only one comes back on.
Good catch, thanks. Once again, I failed to read the post carefully. It was posted in the Switch Forum, not one of the router forums. Could be any router (from anybody).
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