How many is many? We have at least 50 airfiber links deployed and have been using the GigE-apc for over two years so I'm not sure what all revs we have.
We never seen the issues if we use the transector aplu On Jul 30, 2017 2:01 AM, "Jeremy" <jeremysmi...@gmail.com> wrote: > 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 <ch...@wbmfg.com> 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:* af@afmug.com >> *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, <ch...@wbmfg.com> 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: af@afmug.com >>> 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 >>>> <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. >>>>> >>>>> >>>>> >>> >> >> >> -- >> >> 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> >> >> >> > >
