Symptom
Missing statistics for dropped Ethernet frames on ISR1100 LAN ports.
Conditions
Oversubscribed dataplane with ingress traffic flowing from LAN switch ports to the dataplane.
Workaround
Avoid oversubscription of the dataplane.
The drops can be seen with 'show platform hardware subslot 0/1 backplane statistics'.
Further Problem Description
Ingress LAN traffic can be dropped incorrectly on the backplane link between the L2 switch and the dataplane. These drops are not accounted for in the 'show interface' drop counters.