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GS116Ev2 and GS105Ev2 speed issues
I have a strange situation that I cannot figure the cause.
I have had a GS116Ev2 switch setup with VLAN tagging and connected to several devices (including downstream GS105Ev2 switches) for a while now without any issues. All of the devices and switches link up at their appropriate speeds (most at 1Gb, a few at 100Mb), so no problems.
Recently, I bought another GS105Ev2 switch to expand into another room with multiple devices. This switch was updated to latest firmware and configured in a similar manner to the other GS105Ev2 switches already deployed.
I noticed that when I added this new switch to the network, one of the other 105s renegotiated down to 100Mb with the 116. If I removed this new switch from the setup, and renegotiated the other switch, it would go back to 1Gb. But adding this switch to the setup would, again, make that same link downspeed.
To run some tests, I took the 116 configuration to only the 2 switches and tried various ports, different 105s, changing configs, etc and still got the same results. I assume it must have something to do with my cabling, but I don't know enough about networking and auto-negotiation to understand why the "slow" connection used to connect at 1Gb (and tested to work at 1Gb) before but now, with addition of another line into the mix, it slows down to 100Mb.
Any thoughts?
Just to close this thread out...
I was finally able to resolve my issue! It seems that the installer didn't do a clean installation of the wall panel and left the connectors "noisy". By going in and cleaning up the work, everything is up. Thanks for the various suggestions!
I do have a switch question, though, but I'll start a different thread as it's unrelated to this...
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Hi DaneA,
Thanks for responding! I've attached an image of the setup. And, no, the 105s are not daisy-chained - they're edge switches connected to the 116.
Referring to the image:
Essentially, Rooms A&B (blue & red) were setup a while ago and were working fine. When Room C (green) was added, the link from Room B (red) dropped from 1Gb to 100Mb. This happens regardless of which actual 105 switch is used in the room nor which order the rooms are connected.
One other interesting thing I noticed - when either Room C or Room B is plugged into the 116, the switch turns on/off the lights on these connections in alternating fashion (B on for 10-15 secs, turned off, C on for 10-15 secs, turned off, back to B for 10-15 secs, turned off, etc). I notice that it only happens between these 2 room connections - adding/removing Room A (blue) doesn't seem to impact any of the other ports on the 116.
pcm0 wrote:
One other interesting thing I noticed - when either Room C or Room B is plugged into the 116, the switch turns on/off the lights on these connections in alternating fashion (B on for 10-15 secs, turned off, C on for 10-15 secs, turned off, back to B for 10-15 secs, turned off, etc). I notice that it only happens between these 2 room connections - adding/removing Room A (blue) doesn't seem to impact any of the other ports on the 116.
This does indicate some loop or similar odd wiring problems - ensure the four pairs of each connection have no interconnection to the other room.
Double check there are no devices concurrently connecting to the wired and to the wireless network, e.g Sonos in these rooms.
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