We've had a lot of issues with almost all the revs of modules mostly with airfiber. I can't quite pin down who's to blame. But on many sites if we have airfiber x we just remove the modules if we have problems.
On Jul 29, 2017 12:40 PM, "George Skorup" <george.sko...@cbcast.com> wrote: > I think I've seen this mentioned a few times now. Maybe Steve and a couple > others? > > The latest revision (D?) is causing CRC/FCS errors and random link drops. > Taking the SS out makes all problems go away. > > Definitely more issues at gigabit. I have multiple sites with some UBNT > and ePMP stuff (no sync over power). Some I've turned off gigabit > negotiation and get only a few FCS errors here and there. Running gigabit > sees lots more errors and adds a 2-3 second link loss randomly which is a > big issue on a PTP link. > > Got a couple sites with 450i APs. One that I was working with the other > day is a new radio (because the old one blew up). New cable, new GigE-APC, > new PacketFlux PowerInjector. The link tries to negotiate gigabit, but > falls back to 100 after a few tries. Turned off sync over power just to see > and still no gigabit. Remove the SS and it works fine. > > Floating the shield makes no difference. Running the site on battery also > makes no difference. Some FM sites, some water towers, some elevators, some > regular towers with only our stuff on it. > > The stuff I was working with yesterday is a new UBNT Prism PTP radio, new > GigE-APC, new CCR1009. This site also has an Exalt G2-11 fed by an older > GigE-POE-APC and I get no errors on that. It used to be plugged into a > MikroTik CRS210 and I didn't see any errors on that either. > > I had far fewer issues with the older cards. Unfortunately I don't think I > have any good ones left to do a comparison. I do have a couple that got > some water in the jack, maybe I can clean those up for testing. I've used > maybe 10 of the new ones now and they all seem to be causing issues. And > before you ask, yes, I've tried dumb gigabit switches at a few sites > temporarily and still see the random link loss with the SS in line. > > >
