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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 w...
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...
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.
I got a chance to do run an experiment where both of the downstream 105s were disconnected from any end devices and only the switches were plugged in to the 116. The results are the same, which makes me think I am getting "crosstalk" between the CAT6 cables connecting the two rooms to the 116. I know about cross-talk issues *within* a cable, but I haven't read/heard much about cross-talk *between* cables. Any thoughts on where to look and/or how to debug?
Very uncommon. Must be very bad cable, ways off basic CAT5E standard at least.
Could it be something else? I've tried to eliminate as many of the variables as I could and this is the only thing I've come up with as the cause.
One other thing I noticed during this experiment was that the original room (Room B) connection doesn't seem to be as clean as I was originally led to believe. I say that because I noticed that when plugging its cable into the 116, I noticed during the speed negotiation that the port LEDs would turn off for 5+ seconds, then on, then off again for 5+ seconds, etc. for a few cycles before stabilizing to a 1Gb connection.
I assume that is the 116 checking for connectivity issues at the link level, right? If so, does this indicate that it encountered errors and was trying to handle them? Or is it possible that the 105 on that line is bad? I don't notice this behavior on any of the other connections...
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