Analytics appliance ifconfig shows dropped packets on GRE interface
Analytics appliance ifconfig shows dropped packets on GRE interface gre1 interface shows dropped packets
Analytics GRE MPLS
MPLS traffic being mirrored, or other altered ethertype traffic will cause an issue with the interface. The packets will actually be recieived subjectively, but because of kernel limitations, appears as a drop for such a packet type.
This is a false indicator of network performance. There are no packets likely being dropped from appearing in the tunnel.
The Analytics sensor process is more appropriate place to judge performance of the appliance. This is in Analytics->Configuration->Overview