ifconfig and ip commands report packet drops?

Issue

• ifconfig reports rx drops for servers, physical or VMware guests, after upgrading to RHEL7
• ip -s link and ifconfig report the rx_drop* counter increasing but no drops are seen with ethtool -S ethX
• RHEL7 ifconfig show rx drops while RHEL 6.X guests running on the very same ESX host or cluster show no rx drops
• Any NIC hardware type
• netstat -i reports RX-ERR and RX-DRP
• We are using bond interface on MRG 2.3. Suddenly, dropped packets occurs on slave's one of bond interfaces.
• After installing the RT kernel we observed the rx_dropped counter increasing for ifconfig.