Good afternoon everyone.
I'm from Brazil and I had some problems with a 4011iGS+.
I was using it in version 6.43.16 running PPPoE, CGNAT, SNMP, some VLANs and OSPF.
This equipment was connected to a CRS112-8G-4S switch in version 6.43.16 with all bridged ports connected to my BGP (CCR1036-12G-4S) in version 6.44.5 running only OSPF, eBGP and some VLANs.
Those equipments were connected by optic fiber just a few miles away, but the VLAN that communicated the RB-4011 with the BGP was losing a lot of packets.
When checking the interface there was no problem, performing OSPF communication directly on the interface caused all packet loss to cease.
When I downgraded from version 6.44.5 to 6.43.16 the losses ceased and there were no more problems.