The netstat -s option can be used to display statistics for each protocol.

[root@server1 ~]# netstat -s
IcmpMsg:
    InType3: 3
    OutType3: 3
Tcp:
    43 active connections openings
    2 passive connection opening
. . .
Udp:
    17184 packets received
    3 packets to unknown port received.
. . .

The netstat -i option can be used to display statistics for each interface.

[root@server1 ~]# netstat -i
Kernel Interface table
Iface    MTU   RX-OK  RX-ERR  RX-DRP  RX-OVR    TX-OK  TX-ERR  TX-DRP  TX-OVR    Flg
eth0    1500  369196       0      50       0   191386       0       0       0   BMRU
lo     65536       0       0       0       0        8       0       0       0    LRU