I’ve been having a problem with ethernet port flapping on numerous B5c and B5 radios.
I’m using MikroTik routers at all of these sites. We’ve used shielded Cat6 at all sites and equipment is properly grounded with shielded RJ45 connectors properly terminated.
At some locations, we’ve had very little trouble with this. At other locations, it’s been much worse.
One B5c at one site has been especially bad. So I’m using it as a ‘test site’. At first, the ethernet port connection on this particular radio/router was flapping up and down many times during a day. One day, I could even watch the link light on the MikroTik router going off and on as the ethernet port dropped and came back up.
At this site, on this B5c/MikroTik system, I’ve replaced the POE injector feeding the B5c with a another POE injector from Tycon… I immediately saw an improvement. The flapping has now been dropping a few times a day. But I can’t tolerate hardly anything like this on this system.
I’ve also changed out the MikroTik router, from a CRS326 to an RB1100 (which has dual internal power supplies). I haven’t really seen much of a change in how often the port flaps occur, after this change.
I’ve also tried different configuration settings in the B5c and in both MikroTik routers. None of these have completely stopped the flapping.
I have not tried putting another switch between the B5c POEs and the MikroTik router(s). I’ve read where some have done this and it appeared to fix their problem with port flapping.
Has anyone been able to come up with a real ‘fix’ for this problem and if so, what did you do?
Or should I just stop trying to use MikroTik routers/switches? What brands/models of routers/switches has anyone else been using that doesn’t have this problem with Mimosa radios?
John Rayfield, Jr.