TCP/IP 笔记 6 netstat -s 命令查看每个协议统计数据

netstat -s 命令，查看每个协议统计数据的常用方法

lenovo-myc@lenovomyc-Lenovo-Product:~$ netstat -s
Ip:
    1533249 total packets received
    0 forwarded
    3 with unknown protocol
    0 incoming packets discarded
    1532735 incoming packets delivered
    1003949 requests sent out
    24 outgoing packets dropped
    173 dropped because of missing route
Icmp:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　ICMP的数据统计
    938 ICMP messages received
    2 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 938
    3530 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 3530
IcmpMsg:
        InType3: 938
        OutType3: 3530
Tcp:
    42120 active connections openings
    2 passive connection openings
    2890 failed connection attempts
    1163 connection resets received
    4 connections established
    802662 segments received
    804241 segments send out
    88944 segments retransmited
    480 bad segments received.
    10619 resets sent
Udp:
    1128215 packets received
    3527 packets to unknown port received.
    0 packet receive errors
    100829 packets sent
UdpLite:
TcpExt:
    5683 TCP sockets finished time wait in fast timer
    82 packets rejects in established connections because of timestamp
    24590 delayed acks sent
    5 delayed acks further delayed because of locked socket
    Quick ack mode was activated 14663 times
    373180 packet headers predicted
    116427 acknowledgments not containing data payload received
    19329 predicted acknowledgments
    1 times recovered from packet loss due to fast retransmit
    161 times recovered from packet loss by selective acknowledgements
    Detected reordering 1 times using FACK
    Detected reordering 2 times using SACK
    Detected reordering 5 times using time stamp
    10 congestion windows fully recovered without slow start
    3 congestion windows partially recovered using Hoe heuristic
    51 congestion windows recovered without slow start by DSACK
    214 congestion windows recovered without slow start after partial ack
    19 timeouts after SACK recovery
    6 timeouts in loss state
    171 fast retransmits
    35 forward retransmits
    41 retransmits in slow start
    12491 other TCP timeouts
    TCPLossProbes: 10455
    TCPLossProbeRecovery: 874
    7 SACK retransmits failed
    14751 DSACKs sent for old packets
    271 DSACKs sent for out of order packets
    2272 DSACKs received
    19 DSACKs for out of order packets received
    1800 connections reset due to unexpected data
    815 connections reset due to early user close
    10557 connections aborted due to timeout
    TCPSACKDiscard: 14
    TCPDSACKIgnoredNoUndo: 287
    TCPSpuriousRTOs: 4
    TCPSackShifted: 25
    TCPSackMerged: 54
    TCPSackShiftFallback: 3112
    IPReversePathFilter: 15
    TCPRetransFail: 21
    TCPRcvCoalesce: 152920
    TCPOFOQueue: 80259
    TCPOFOMerge: 279
    TCPChallengeACK: 486
    TCPSYNChallenge: 485
    TCPSpuriousRtxHostQueues: 1
IpExt:
    InNoRoutes: 44
    InMcastPkts: 66158
    OutMcastPkts: 3212
    InBcastPkts: 559882
    OutBcastPkts: 679
    InOctets: 1158920000
    OutOctets: 157675331
    InMcastOctets: 9253517
    OutMcastOctets: 124624
    InBcastOctets: 47900722
    OutBcastOctets: 93215
    InNoECTPkts: 1767197
    InECT1Pkts: 30
    InECT0Pkts: 938
    InCEPkts: 456