In this example, the inside interface shows 96 Rx Errors. The inside interface receives packets which are traveling in an outbound direction and the outside interface receives packets traveling in an inbound direction. Contrary to one's expectations, the rx-errors measurement engine variable in the link object will match the NIC RxErrors field for the opposite direction.
PacketShaper# net nic
device Inside 00:e0:ed:ff:ff:fa
Link State: UP (100Mbps) Controller Type: INTEL 82571-COPPER nic0 MIB: <cut> RxErrors 96
Link State: UP (100Mbps) Controller Type: INTEL 82571-COPPER nic1 MIB: <cut> RxErrors 0
This is a known issue, please contact technical support for further details.