All of my AF5Xs and AF24 are running on the older version of the GIGE-POE-APC and they work fine at gigabit. We have MANY. Just FYI.
On Sat, Jul 29, 2017 at 9:28 PM, Chuck McCown <[email protected]> wrote: > Thanks, all info like this is very helpful. GigE is more akin to RF > engineering than digital. > > *From:* Adair Winter > *Sent:* Saturday, July 29, 2017 8:19 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] new GigE-APC issues > > If we can feed you any data to help troubleshoot, please let me know what > that would be. in several places we've had to remove the modules. It only > seems like it's airfiber 24's and 5x's we ever have problems with. I mostly > chock it up them and possibly crummy ethernet ports. When we have trouble > it doesn't seem to matter what cable we use or how long the run is it. We > have lots on UBNT Carrier cable and recently many on Primus CAT6, doesn't > seem to make a lot of difference. Removing the modules always fixes the CRC > errors though. > > On Sat, Jul 29, 2017 at 9:10 PM, <[email protected]> wrote: > >> It tests perfect on the lab.... but as we all know.... >> >> Full speed, no CRC or any other type of errors. Long cables, short >> cables etc etc. >> >> I generally only hear from cambium users. And not that much, so it is >> not happening on all of them, but some. >> >> I do have 3 components coming that have better specs that I am switching >> to. >> It will improve NEXT and return loss. >> If that is the cause then that will be the fix. >> >> There is also a thing in the POE inserters called the "Bob Smith" or BS >> termination. >> There really was a guy named Bob Smith that did the original calculation. >> >> There is another guy that has more recently published a different >> mathematical treatment of the BS termination that uses a different >> impedance. I am going to try this and see if it improves things as well. >> >> -----Original Message----- From: George Skorup >> Sent: Saturday, July 29, 2017 4:10 PM >> To: [email protected] >> Subject: Re: [AFMUG] new GigE-APC issues >> >> I had very few issues with the previous ones. The RJ45 tab facing at the >> PCB was a minor inconvenience. Sync over power + gigabit didn't play >> nice with those, but GigE otherwise worked fine. >> >> I tested a couple prototypes of the new revision for Chuck. Sync over >> power + gigabit with a PowerInjector+Sync and a 450 AP worked fine. Then >> we replaced that AP with a 450i because of the 450's PPS limit. I didn't >> notice it at the time, but the 450i never came up at gigabit. We didn't >> really need >80Mbps downlink anyway. It would usually run about 55-60 at >> night which was where the 450 was crapping out. Well, more like 50 and >> 9-10k PPS. >> >> Now I've got some ePMP GPS radios for PTP (not for sync, just the GigE >> interface). Same symptoms as the UBNT prism thingamajig. The link comes >> up at gig, but flaps and constant FCS errors. The 450i just goes, gig, >> gig, gig, nope.. 100mbps at bootup. >> >> Pulling the SS out makes it work, but I can't do that. We lost that 450i >> AP because someone went and bypassed the SS because they were apparently >> concerned about the CRC errors and didn't f'ing tell me about it, even >> after I said I'd debug it on Monday. Welp, a storm rolled in the Friday >> before and.. there went the AP. Good job! In Steve Jones' words, I have >> only one comment: fuckwits. >> >> I'd say just stay tuned. Chuck is working on it. As he put it, GigE is a >> different animal. NEXT, FEXT and all that fun stuff. >> >> On 7/29/2017 4:20 PM, Matt wrote: >> >>> Seeing same issues on Gigabit ethernet ports with Cambium PxP450i and >>> also SAF licensed gear. Shorter cable runs help but just not possible >>> on some towers. Bypassing the GigE-APC always fixes it. >>> >>> >>> On Sat, Jul 29, 2017 at 12:40 PM, George Skorup >>> <[email protected]> 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. >>>> >>>> >>>> >> > > > -- > > Adair Winter > VP, Network Operations / Co-Owner > Amarillo Wireless | 806.316.5071 <(806)%20316-5071> > C: 806.231.7180 <(806)%20231-7180> > http://www.amarillowireless.net > <http://www.amarillowireless.net> > > >
