At 10.20 we had one of the ring switches in DBC reload itself, where we have 2 switches running in a stack. The moment the second switch came back online we started seeing packetloss throughout DBC.

For now we disabled all ports of the second switch while we investigate into this matter, currently seeing a steady ping again.

Update 12:20:
Half of the ports have been enabled again, after resetting the bridges on the VPLS ring.

Update 16:15:
The other half has been enabled now as well.

We've made a case at the vendor to debug this in more detail.