Nathan have you used a bit longer cable from EPC to router and use port 9. This fixed our FCS error issue.
-- Justin Davis COO SkyWerx Industries, LLC > On Feb 16, 2017, at 5:00 AM, Nathan Anderson <nath...@fsr.com> wrote: > > So, as an update to this, we are still seeing these FCS errors between the > EPC (port 11) and the CCR-1036. > > I know it is not just a reporting error, because we have been having issues > for a while with UEs dropping off randomly, and until now we just assumed the > underlying cause was whatever issue supposedly solves this for others in the > upcoming 6.6M2 release. However, looking at the EPC logs, it is clear that > the UEs are dropping at least in our case because the SCTP session between > the EPC and some eNB on the network breaks down. And every time this > happens, I can take the timestamp from the EPC log of the SCTP failure, go > over to the CCR, look through its logs, and find an FCS error log entry with > a timestamp that matches up with the SCTP failure *exactly*. Not every FCS > error results in an eNB disconnect, but every eNB disconnect can be traced > back to an FCS error. > > Soo, clearly we need to get this fixed. To that end, I have tried the > following: > > 1) Replaced the ethernet cable > 2) Tried a different port on the CCR > 3) Tried a different port on the EPC (that's always fun, because "reboots") > 4) REPLACED THE CCR > > We are still seeing FCS receive errors on that port and that port only. > > Anybody have any other ideas? > > -- Nathan > > From: telrad-boun...@wispa.org [mailto:telrad-boun...@wispa.org] On Behalf Of > Nathan Anderson > Sent: Monday, January 30, 2017 1:31 PM > To: email@example.com > Subject: Re: [Telrad] Ethernet RX FCS errors from BreezeWay? > > We have always had a habit of doing ths. And we are on 6.32.x. > > Searching through the ROS changelogs (which are a lot more verbose these days > than they used to be) for "FCS" revealed nothing interesting. > > -- Nathan > > From: telrad-boun...@wispa.org [mailto:telrad-boun...@wispa.org] On Behalf Of > Shayne Lebrun > Sent: Monday, January 30, 2017 7:15 AM > To: firstname.lastname@example.org > Subject: Re: [Telrad] Ethernet RX FCS errors from BreezeWay? > > And always make sure, when upgrading RouterOS, that you then upgrade the > Routerboard firmware. I think it happens semi-automatically now; you no > longer need to do a /system routerboard upgrade,’ but you do still need a > second reboot. > > From: telrad-boun...@wispa.org [mailto:telrad-boun...@wispa.org] On Behalf Of > Jesse Dupont > Sent: Monday, January 30, 2017 8:51 AM > To: email@example.com > Subject: Re: [Telrad] Ethernet RX FCS errors from BreezeWay? > > What RouterOS version is on this CCR? I think around the 6.34 mark, these > started showing up in some circumstances, but a RouterOS upgrade resolves > them (may just be a reporting error or hardware driver bug). > > > > > On Mon, Jan 30, 2017 at 12:37 AM -0700, "Nathan Anderson" <nath...@fsr.com> > wrote: > > We have recently noticed a new problem: we have an access port on our > BreezeWay (in this case, so happens it's the BW's port 10, but may not be > relevant) that is plugged into a MikroTik CCR 1036. The MikroTik is > reporting that it is sporadically seeing FCS errors on frames received from > the BreezeWay. I have replaced the ethernet cable and also tried moving to a > different ethernet port on the CCR. Neither has made a difference. > > I'm wondering if there is any way I can see any ethernet stats or diagnostic > information from the BreezeWay's perspective. In my poking around, so far I > have come up empty. > > I'm not necessarily convinced at this point that this is the BreezeWay's > fault, mind you. I'm just wondering if anybody else has seen something > similar, and how to best go about chasing this problem down. My perception > is that the CCRs in particular have had a troubled history when it comes to > its copper gig ports...search for "Ubiquiti AirFiber MikroTik CCR" if you > want some fun afternoon light reading. > > Thanks, > > -- > Nathan Anderson > First Step Internet, LLC > nath...@fsr.com > > _______________________________________________ > Telrad mailing list > Telrad@wispa.org > http://lists.wispa.org/mailman/listinfo/telrad > _______________________________________________ > Telrad mailing list > Telrad@wispa.org > http://lists.wispa.org/mailman/listinfo/telrad
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