netstat -D
The -D option allows you to see packets coming into and going out of each layer in the communications subsystem along with packets dropped at each layer.
# netstat -D
Source Ipkts Opkts Idrops Odrops
-------------------------------------------------------------------------------
ent_dev1 32556 727 0 0
ent_dev2 0 1 0 0
ent_dev3 0 1 0 0
fcnet_dev0 24 22 0 0
fcnet_dev1 0 0 0 0
ent_dev0 14 15 0 0
---------------------------------------------------------------
Devices Total 32594 766 0 0
-------------------------------------------------------------------------------
ent_dd1 32556 727 0 0
ent_dd2 0 2 0 1
ent_dd3 0 2 0 1
fcnet_dd0 24 22 0 0
fcnet_dd1 0 0 0 0
ent_dd0 14 15 0 0
---------------------------------------------------------------
Drivers Total 32594 768 0 2
-------------------------------------------------------------------------------
fcs_dmx0 0 N/A 0 N/A
fcs_dmx1 0 N/A 0 N/A
ent_dmx1 31421 N/A 1149 N/A
ent_dmx2 0 N/A 0 N/A
ent_dmx3 0 N/A 0 N/A
fcnet_dmx0 0 N/A 0 N/A
fcnet_dmx1 0 N/A 0 N/A
ent_dmx0 14 N/A 0 N/A
---------------------------------------------------------------
Demuxer Total 31435 N/A 1149 N/A
-------------------------------------------------------------------------------
IP 46815 34058 64 8
IPv6 0 0 0 0
TCP 862 710 9 0
UDP 12412 13 12396 0
---------------------------------------------------------------
Protocols Total 60089 34781 12469 8
-------------------------------------------------------------------------------
en_if1 31421 732 0 0
fc_if0 24 22 0 0
en_if0 14 20 0 6
lo_if0 33341 33345 4 0
---------------------------------------------------------------
Net IF Total 64800 34119 4 6
-------------------------------------------------------------------------------
(Note: N/A -> Not Applicable)
The Devices layer shows number of packets coming into the adapter, going out of the adapter, and number of packets dropped on input and output. There are various causes of adapter errors, and the netstat -v command can be examined for more details.
The Drivers layer shows packet counts handled by the device driver for each adapter. Output of the netstat -v command is useful here to determine which errors are counted.
The Demuxer values show packet counts at the demux layer, and Idrops here usually indicate that filtering has caused packets to be rejected (for example, Netware or DecNet packets being rejected because these are not handled by the system under examination).