Hi,
We’re also getting 4-7% packet loss using S-31DLC20D and CCR1036-12G-4S.
SFP1: S-85DLC05D (MM multimode)
SFP2: S-31DLC20D (SM single mode)
I posted a new article on this yesterday: http://forum.mikrotik.com/t/packet-loss-to-downstream-router-connected-to-ccr1036-12g-4s-after-power-cut/88007/1
Our problems started after the CCR was powered off incorrectly after a mains power outage.
Once it came back up we have this packet loss.
We’re not getting packet loss via the MM SFP.
It’s just to the b-end of the SM SFP.
At the B-end of the SM SFP we have a RB1100AHx2 - however we are using a UBNT EdgeSwitch with a S-31DLC20D SFP fitted.
So does this sounds like an SFP failure rather than a CCR failure??
We could swap the SFP over.
This is the second time this has happened to us following a power cut.