We see them even on fiber ports. not as many, but a few. It's definitely in the EPC.
YMMV, JP On Thu, 16 Feb 2017 12:00:52 +0000, Nathan Anderson 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 > underlyingcause 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 breaksdown. 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 errorresults > 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: [email protected] [mailto:[email protected]]On Behalf Of > Nathan Anderson > Sent: Monday, January 30, 2017 1:31 PM > To: [email protected] > 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:[email protected] [mailto:[email protected]]On Behalf Of > Shayne Lebrun > Sent: Monday, January 30, 2017 7:15 AM > To: [email protected] > 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 needto do a /system routerboard [UTF-8?]upgrade,â but you do still > need a second reboot. > > > From:[email protected] [mailto:[email protected]]On Behalf Of > Jesse Dupont > Sent: Monday, January 30, 2017 8:51 AM > To: [email protected] > 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" <[email protected]> > 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 AndersonFirst Step Internet, [email protected] _______________________________________________Telrad mailing [email protected]http://lists.wispa.org/mailman/listinfo/telrad Joe Portman Alamo Broadband Inc. www.alamobroadband.com
_______________________________________________ Telrad mailing list [email protected] http://lists.wispa.org/mailman/listinfo/telrad
