RX drop encountered for e1000e driver

Issue

• Interface eth1 is experiencing high count of RX-DRP.

netstat -i
Kernel Interface table
Iface MTU    Met RX-OK      RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
bond0 1500   0   2662386193    0      0      0 2806975752   0   0   0 BMmRU
eth0  1500   0   2591515322    0      0      0 2806975752   0   0   0 BMsRU
eth1  1500   0   1105491112    0 58236888    0 98715028     0   0   0 BMRU
eth2  1500   0   70870871      0      0      0        0     0   0   0 BMsRU
lo    16436  0   1718140323    0      0      0 1718140323   0   0   0 LRU

# ethtool -S eth1
NIC statistics:

     rx_missed_errors: 58292301

 Have increased the RX ring buffers:

 # ethtool -g eth1

Ring parameters for eth1:
Pre-set maximums:
RX:             4096
RX Mini:        0
RX Jumbo:       0
TX:             4096
Current hardware settings:
RX:             4096
RX Mini:        0
RX Jumbo:       0
TX:             4096

Can you find out what is the root cause for this?