netstat

[root@cw003 ~]# netstat -s
tcp:
        35543667869 packets sent
                33993761746 data packets (110588876004270 bytes)
                1070592345 data packets (1759534178262 bytes) retransmitted
                4713497 data packets unnecessarily retransmitted
                2349463 resends initiated by MTU discovery
                412259111 ack-only packets (17690391 delayed)
                0 URG only packets
                26254550 window probe packets
                24767037 window update packets
                18267074 control packets
        40077338123 packets received
                33391986008 acks (for 110356598577267 bytes)
                4455300665 duplicate acks
                3320453 acks for unsent data
                758791668 packets (612175995238 bytes) received in-sequence
                63937501 completely duplicate packets (1502957016 bytes)
                47535524 old duplicate packets
                34914 packets with some dup. data (16166608 bytes duped)
                13624724 out-of-order packets (13321932596 bytes)
                44559 packets (35096 bytes) of data after window
                0 window probes
                1297874971 window update packets
                3393697 packets received after close
                252397 discarded for bad checksums
                5 discarded for bad header offset fields
                0 discarded because packet too short
                4314 discarded due to memory problems
        274777 connection requests
        26063763 connection accepts
        56 bad connection attempts
        0 listen queue overflows
        81468066 ignored RSTs in the windows
        26329090 connections established (including accepts)
        26345036 connections closed (including 5498422 drops)
                16933246 connections updated cached RTT on close
                17898881 connections updated cached RTT variance on close
                13552114 connections updated cached ssthresh on close
        46 embryonic connections dropped
        17155583283 segments updated rtt (of 16616962661 attempts)
        129368379 retransmit timeouts
                776813 connections dropped by rexmit timeout
        30393630 persist timeouts
                38885 connections dropped by persist timeout
        526556 Connections (fin_wait_2) dropped because of timeout
        52509 keepalive timeouts
                46744 keepalive probes sent
                5765 connections dropped by keepalive
        18049020160 correct ACK header predictions
        635828086 correct data packet header predictions
        26562254 syncache entries added
                1261895 retransmitted
                1762600 dupsyn
                842 dropped
                26063763 completed
                0 bucket overflow
                0 cache overflow
                364676 reset
                139210 stale
                0 aborted
                0 badack
                1293 unreach
                0 zone failures
        26563096 cookies sent
        10515 cookies received
        2640930 hostcache entries added
                798764 bucket overflow
        323160843 SACK recovery episodes
        808185419 segment rexmits in SACK recovery episodes
        1127502515320 byte rexmits in SACK recovery episodes
        5085552251 SACK options (SACK blocks) received
        70436345 SACK options (SACK blocks) sent
        414158 SACK scoreboard overflow
        0 packets with ECN CE bit set
        0 packets with ECN ECT(0) bit set
        0 packets with ECN ECT(1) bit set
        0 successful ECN handshakes
        0 times ECN reduced the congestion window
        0 packets with valid tcp-md5 signature received
        0 packets with invalid tcp-md5 signature received
        0 packets with tcp-md5 signature mismatch
        0 packets with unexpected tcp-md5 signature received
        0 packets without expected tcp-md5 signature received
udp:
        152481 datagrams received
        0 with incomplete header
        0 with bad data length field
        5 with bad checksum
        447 with no checksum
        21931 dropped due to no socket
        18144 broadcast/multicast datagrams undelivered
        0 dropped due to full socket buffers
        0 not for hashed pcb
        112401 delivered
        121819 datagrams output
        0 times multicast source filter matched
sctp:
        0 input packets
                0 datagrams
                0 packets that had data
                0 input SACK chunks
                0 input DATA chunks
                0 duplicate DATA chunks
                0 input HB chunks
                0 HB-ACK chunks
                0 input ECNE chunks
                0 input AUTH chunks
                0 chunks missing AUTH
                0 invalid HMAC ids received
                0 invalid secret ids received
                0 auth failed
                0 fast path receives all one chunk
                0 fast path multi-part data
        0 output packets
                0 output SACKs
                0 output DATA chunks
                0 retransmitted DATA chunks
                0 fast retransmitted DATA chunks
                0 FR's that happened more than once to same chunk
                0 output HB chunks
                0 output ECNE chunks
                0 output AUTH chunks
                0 ip_output error counter
        Packet drop statistics:
                0 from middle box
                0 from end host
                0 with data
                0 non-data, non-endhost
                0 non-endhost, bandwidth rep only
                0 not enough for chunk header
                0 not enough data to confirm
                0 where process_chunk_drop said break
                0 failed to find TSN
                0 attempt reverse TSN lookup
                0 e-host confirms zero-rwnd
                0 midbox confirms no space
                0 data did not match TSN
                0 TSN's marked for Fast Retran
        Timeouts:
                0 iterator timers fired
                0 T3 data time outs
                0 window probe (T3) timers fired
                0 INIT timers fired
                0 sack timers fired
                0 shutdown timers fired
                0 heartbeat timers fired
                0 a cookie timeout fired
                0 an endpoint changed its cookiesecret
                0 PMTU timers fired
                0 shutdown ack timers fired
                0 shutdown guard timers fired
                0 stream reset timers fired
                0 early FR timers fired
                0 an asconf timer fired
                0 auto close timer fired
                0 asoc free timers expired
                0 inp free timers expired
        0 packet shorter than header
        0 checksum error
        0 no endpoint for port
        0 bad v-tag
        0 bad SID
        0 no memory
        0 number of multiple FR in a RTT window
        0 RFC813 allowed sending
        0 RFC813 does not allow sending
        0 times max burst prohibited sending
        0 look ahead tells us no memory in interface
        0 numbers of window probes sent
        0 times an output error to clamp down on next user send
        0 times sctp_senderrors were caused from a user
        0 number of in data drops due to chunk limit reached
        0 number of in data drops due to rwnd limit reached
        0 times a ECN reduced the cwnd
        0 used express lookup via vtag
        0 collision in express lookup
        0 times the sender ran dry of user data on primary
        0 same for above
        0 sacks the slow way
        0 window update only sacks sent
        0 sends with sinfo_flags !=0
        0 unordered sends
        0 sends with EOF flag set
        0 sends with ABORT flag set
        0 times protocol drain called
        0 times we did a protocol drain
        0 times recv was called with peek
        0 cached chunks used
        0 cached stream oq's used
        0 unread messages abandonded by close
        0 send burst avoidance, already max burst inflight to net
        0 send cwnd full avoidance, already max burst inflight to net
        0 number of map array over-runs via fwd-tsn's
ip:
        40082471379 total packets received
        0 bad header checksums
        1 with size smaller than minimum
        0 with data size < data length
        0 with ip length > max ip packet size
        0 with header length < data size
        0 with data length < header length
        0 with bad options
        0 with incorrect version number
        69 fragments received
        1 fragment dropped (dup or out of space)
        3 fragments dropped after timeout
        33 packets reassembled ok
        40077654178 packets for this host
        4785758 packets for unknown/unsupported protocol
        0 packets forwarded (0 packets fast forwarded)
        31406 packets not forwardable
        0 packets received for unknown multicast group
        0 redirects sent
        35555704277 packets sent from this host
        0 packets sent with fabricated ip header
        0 output packets dropped due to no bufs, etc.
        0 output packets discarded due to no route
        0 output datagrams fragmented
        0 fragments created
        1232 datagrams that can't be fragmented
        0 tunneling packets that can't find gif
        0 datagrams with bad address in header
icmp:
        0 calls to icmp_error
        0 errors not generated in response to an icmp message
        Output histogram:
                echo reply: 28964
                time stamp reply: 1
        0 messages with bad code fields
        0 messages less than the minimum length
        2006 messages with bad checksum
        5 messages with bad length
        0 multicast echo requests ignored
        0 multicast timestamp requests ignored
        Input histogram:
                echo reply: 9272
                destination unreachable: 4854963
                source quench: 24
                routing redirect: 1382
                echo: 28964
                time exceeded: 51565
                time stamp: 1
        28965 message responses generated
        0 invalid return addresses
        0 no return routes
        ICMP address mask responses are disabled
igmp:
        1075 messages received
        0 messages received with too few bytes
        0 messages received with wrong TTL
        0 messages received with bad checksum
        1074 V1/V2 membership queries received
        0 V3 membership queries received
        0 membership queries received with invalid field(s)
        1074 general queries received
        0 group queries received
        0 group-source queries received
        0 group-source queries dropped
        0 membership reports received
        0 membership reports received with invalid field(s)
        0 membership reports received for groups to which we belong
        0 V3 reports received without Router Alert
        0 membership reports sent
arp:
        23 ARP requests sent
        119 ARP replies sent
        903381 ARP requests received
        14 ARP replies received
        903395 ARP packets received
        116 total packets dropped due to no ARP entry
        19 ARP entrys timed out
        0 Duplicate IPs seen
ip6:
        0 total packets received
        0 with size smaller than minimum
        0 with data size < data length
        0 with bad options
        0 with incorrect version number
        0 fragments received
        0 fragments dropped (dup or out of space)
        0 fragments dropped after timeout
        0 fragments that exceeded limit
        0 packets reassembled ok
        0 packets for this host
        0 packets forwarded
        0 packets not forwardable
        0 redirects sent
        0 packets sent from this host
        0 packets sent with fabricated ip header
        0 output packets dropped due to no bufs, etc.
        17 output packets discarded due to no route
        0 output datagrams fragmented
        0 fragments created
        0 datagrams that can't be fragmented
        0 packets that violated scope rules
        0 multicast packets which we don't join
        Mbuf statistics:
                0 one mbuf
                96173 one ext mbuf
                0 two or more ext mbuf
        0 packets whose headers are not contiguous
        0 tunneling packets that can't find gif
        0 packets discarded because of too many headers
        1 failure of source address selection
        source addresses on a non-outgoing I/F
                1 addresses scope=f
        Source addresses selection rule applied:
                1 same address
icmp6:
        0 calls to icmp6_error
        0 errors not generated in response to an icmp6 message
        0 errors not generated because of rate limitation
        0 messages with bad code fields
        0 messages < minimum length
        0 bad checksums
        0 messages with bad length
        Histogram of error messages to be generated:
                0 no route
                0 administratively prohibited
                0 beyond scope
                0 address unreachable
                0 port unreachable
                0 packet too big
                0 time exceed transit
                0 time exceed reassembly
                0 erroneous header field
                0 unrecognized next header
                0 unrecognized option
                0 redirect
                0 unknown
        0 message responses generated
        0 messages with too many ND options
        0 messages with bad ND options
        0 bad neighbor solicitation messages
        0 bad neighbor advertisement messages
        0 bad router solicitation messages
        0 bad router advertisement messages
        0 bad redirect messages
        0 path MTU changes
rip6:
        0 messages received
        0 checksum calculations on inbound
        0 messages with bad checksum
        0 messages dropped due to no socket
        0 multicast messages dropped due to no socket
        0 messages dropped due to full socket buffers
        0 delivered
        0 datagrams output