Hi,
I need help, I don’t know why my FCS error causes network outage, i noticed this when i saw fcs error on mikrotik log, then checked my MRTG traffic monitoring, the time fcs error occured is also the time my traffic went down suddenly base on the MRTG. Already upgrade RouterOs and firmware, change cable, set duplext to auto, still fcs occured and outage cycles
Our network is on layer 3 setup around 3 hops from the other, but still causes outage when fcs occured.
Any suggestions?
You haven’t stated yout Mikrotik model and port occupation, so it is hard to say whether you can use a different port at Mikrotik side which would be my first step after replacing the cable.
If that does not help, it may be that the sending side calculates the FCS incorrectly for some packets; it may be a systematic issue or a fault of that particular piece. So again, no idea what the sending equipment is and what are your chances to replace it completely or use a different port.
Hi,
We’re using ccr1009,1016,1036, ccr connected with d-link switch causes fcs, both sides are auto neg, changed cable already but still fcs, i tried to disable the port and currently monitoring until tomorrow, i know it’s not the solution to just disable or transfer it to another port, routers are not created like that and it should be working at any setup unless its a hardware failure or mikrotik bug, my concern is why does the error causes outage, it’s like the error propages to out whole network and all ccr stops passing traffic, no neighbors and we need to hard reboot to make ccr’s run again, there is also a cisco switch between, but the cisco is still up and the ccr on the other is running and accessible thru winbox but not passing traffic causing network outage.
So are you saying that the FCS error is reported and then all routing (or switching?) stops, not that just a single connection breaks? That definitely doesn’t sound like a problem of an interface. But maybe there is some misconfiguration of STP protocol or some loop in the network.
Please post the error message from the log which reports the FCS, maybe I’ve decoded the abbreviation in a wrong way.
Hi,
I disable stp since all of my ccr configured with bridge is facing devices that are not redundant or may produce loop, when fcs receives my router stops passing traffic on all side, and we need to hard reboot
