All surge suppressors can and probably will cause this if there is a ground potential difference or an unusually high amount of electrical noise on the ground that the surge suppressor is connected to.
Lift the ground off the surge suppressor to see if that helps. From: Steve Jones Sent: Wednesday, July 19, 2017 1:49 PM To: [email protected] Subject: Re: [AFMUG] flapping ethernet port ospf workaround BBDGE its got the transtector surge suppressor, I'm suspecting that, this is the only lik with it and both radios are doing it On Wed, Jul 19, 2017 at 2:44 PM, Colin Stanners <[email protected]> wrote: Do you have shielded cable the whole way end to end? SAFs seem to be quite sensitive to that. On Jul 19, 2017 11:20 AM, "Steve Jones" <[email protected]> wrote: So ive been dealing with the SAFs and the mikrotiks being uppity with one another. SAF has a gigabit port, but it only offers the option to lock it to 100, not gigabit. so I have the mikrotiks set, just not the otherside, the port still flaps on both radios what was happening is everytime it flaps, the interface dropped in ospf and went neighbor down, rerouting traffic then coming back up what I did was made a bridge, added that port to it, and put the ospf ip on the bridge itself, this allows the port to flap without the ospf interface going down until we work throught the issue with SAF I'm wondering if this is causing some other harm having it on the bridge, rather than the physical port
