Hi all!

I have a fiber link between rb5009 and crs318.

Due to the fact that it's single mode (S-53LC20D), I had to disable auto-negotiation and set 1g Base X on both. Cause if it's auto-negotiation, I had more disconetions...

But, times to times, ramdomly, the crs318 goes offline, and than, I have to:

-disable sfp interface
-enable sfp interface

and than goes online...

Does anyone have the same behaviour?

If it's normal, can someone give me a hand and create a script that pings from rb5009 to crs318 and if fails disable / enable sfp interface...

If it's normal, can someone give me a hand and create a script that pings from rb5009 to crs318 and if fails disable / enable sfp interface...

Personally I don't think it is normal, but if the crs318 has an IP address, you could use netwatch for the check.
https://help.mikrotik.com/docs/spaces/R ... 8/Netwatch

But it would be IMHO only a temporary workaround.

In the up script you can have "nothing" (or maybe an added log entry).
In the down script you can have *something like*: How often is the "times to times"?
Does disabling/enabling interface "always" re-establish the connection?

The only issue I can see with such a simple netwatch script is that if the disabling/re-enabling of the interface fails to restore the connection or fails before the next run of netwatch the port will start "flapping" so the netwatch should be run not too often (but it also depends on how much delay to insert on the script and how long you can "bear" the loss of connectivity).

try
/interface/ethernet set sfp-rate-select=low sfp-sfpplus1