监视网络接口数据

监视网络接口TCP状态信息数据有多种工具或命令。下面举例一些：

nstat命令

# nstat#kernelIpInReceives                    9733104            0.0IpInDelivers                    9733102            0.0IpOutRequests                   9058593            0.0IcmpInErrors                    2147               0.0IcmpInCsumErrors                1143               0.0IcmpInDestUnreachs              2                  0.0IcmpInTimeExcds                 1361               0.0IcmpInParmProbs                 56                 0.0IcmpInRedirects                 1                  0.0IcmpInEchoReps                  701                0.0IcmpInTimestamps                26                 0.0IcmpOutErrors                   750                0.0IcmpOutTimeExcds                23                 0.0IcmpOutEchoReps                 26                 0.0IcmpOutTimestamps               701                0.0IcmpMsgInType0                  26                 0.0IcmpMsgInType3                  1361               0.0IcmpMsgInType4                  1                  0.0IcmpMsgInType8                  701                0.0IcmpMsgInType11                 56                 0.0IcmpMsgOutType0                 701                0.0IcmpMsgOutType3                 23                 0.0IcmpMsgOutType8                 26                 0.0TcpActiveOpens                  678940             0.0TcpPassiveOpens                 910289             0.0TcpAttemptFails                 58018              0.0TcpEstabResets                  14608              0.0TcpInSegs                       9686518            0.0TcpOutSegs                      9038288            0.0TcpRetransSegs                  6700               0.0TcpInErrs                       47                 0.0TcpOutRsts                      67249              0.0UdpInDatagrams                  44409              0.0UdpNoPorts                      23                 0.0UdpOutDatagrams                 44441              0.0Ip6InReceives                   6                  0.0Ip6InNoRoutes                   6                  0.0Ip6OutRequests                  9                  0.0Ip6OutNoRoutes                  3948               0.0Ip6OutMcastPkts                 14                 0.0Ip6InOctets                     432                0.0Ip6OutOctets                    612                0.0Ip6OutMcastOctets               992                0.0Ip6InNoECTPkts                  6                  0.0Icmp6OutMsgs                    9                  0.0Icmp6OutRouterSolicits          3                  0.0Icmp6OutNeighborSolicits        1                  0.0Icmp6OutMLDv2Reports            5                  0.0Icmp6OutType133                 3                  0.0Icmp6OutType135                 1                  0.0Icmp6OutType143                 5                  0.0TcpExtSyncookiesFailed          140                0.0TcpExtEmbryonicRsts             704                0.0TcpExtPruneCalled               23                 0.0TcpExtTW                        615681             0.0TcpExtPAWSEstab                 20                 0.0TcpExtDelayedACKs               52123              0.0TcpExtDelayedACKLocked          44                 0.0TcpExtDelayedACKLost            1518               0.0TcpExtListenDrops               32                 0.0TcpExtTCPPrequeued              19258              0.0TcpExtTCPDirectCopyFromBacklog  45185              0.0TcpExtTCPDirectCopyFromPrequeue 394312             0.0TcpExtTCPHPHits                 943072             0.0TcpExtTCPHPHitsToUser           3478               0.0TcpExtTCPPureAcks               3242625            0.0TcpExtTCPHPAcks                 547259             0.0TcpExtTCPSackRecovery           650                0.0TcpExtTCPFACKReorder            1                  0.0TcpExtTCPSACKReorder            8                  0.0TcpExtTCPTSReorder              23                 0.0TcpExtTCPFullUndo               1                  0.0TcpExtTCPPartialUndo            23                 0.0TcpExtTCPDSACKUndo              1                  0.0TcpExtTCPLossUndo               854                0.0TcpExtTCPLostRetransmit         162                0.0TcpExtTCPSackFailures           135                0.0TcpExtTCPLossFailures           18                 0.0TcpExtTCPFastRetrans            1517               0.0TcpExtTCPForwardRetrans         104                0.0TcpExtTCPSlowStartRetrans       172                0.0TcpExtTCPTimeouts               2764               0.0TcpExtTCPLossProbes             5201               0.0TcpExtTCPLossProbeRecovery      2858               0.0TcpExtTCPSackRecoveryFail       74                 0.0TcpExtTCPRcvCollapsed           460                0.0TcpExtTCPDSACKOldSent           1645               0.0TcpExtTCPDSACKOfoSent           21                 0.0TcpExtTCPDSACKRecv              879                0.0TcpExtTCPAbortOnData            4314               0.0TcpExtTCPAbortOnClose           346                0.0TcpExtTCPAbortOnTimeout         186                0.0TcpExtTCPDSACKIgnoredNoUndo     615                0.0TcpExtTCPSpuriousRTOs           95                 0.0TcpExtTCPSackShifted            402                0.0TcpExtTCPSackMerged             2048               0.0TcpExtTCPSackShiftFallback      2592               0.0TcpExtTCPRcvCoalesce            145162             0.0TcpExtTCPOFOQueue               36672              0.0TcpExtTCPOFOMerge               21                 0.0TcpExtTCPChallengeACK           329                0.0TcpExtTCPSYNChallenge           47                 0.0IpExtInNoRoutes                 2                  0.0IpExtInOctets                   1568628267         0.0IpExtOutOctets                  1158526375         0.0IpExtInNoECTPkts                9828130            0.0IpExtInECT0Pkts                 10                 0.0IpExtInCEPkts                   3                  0.0

ss命令

# ss -sTotal: 319 (kernel 752)TCP:   187 (estab 114, closed 58, orphaned 0, synrecv 0, timewait 58/0), ports 0Transport Total     IP        IPv6*         752       -         -        RAW       0         0         0        UDP       3         2         1        TCP       129       113       16       INET      132       115       17       FRAG      0         0         0

netstat命令

# netstat -iKernel Interface tableIface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flgeth0       9001 0   2194916      0      0 0       1424609      0      0      0 BMRUlo        65536 0   7670598      0      0 0       7670598      0      0      0 LRU

# netstat -sIp:    9743496 total packets received    0 forwarded    0 incoming packets discarded    9743494 incoming packets delivered    9068146 requests sent outIcmp:    2147 ICMP messages received    1143 input ICMP message failed.    InCsumErrors: 2    ICMP input histogram:        destination unreachable: 1361        timeout in transit: 56        source quenches: 1        echo requests: 701        echo replies: 26    750 ICMP messages sent    0 ICMP messages failed    ICMP output histogram:        destination unreachable: 23        echo request: 26        echo replies: 701IcmpMsg:        InType0: 26        InType3: 1361        InType4: 1        InType8: 701        InType11: 56        OutType0: 701        OutType3: 23        OutType8: 26Tcp:    679665 active connections openings    911387 passive connection openings    58018 failed connection attempts    14608 connection resets received    118 connections established    9696894 segments received    9047825 segments send out    6700 segments retransmited    47 bad segments received.    67249 resets sentUdp:    44425 packets received    23 packets to unknown port received.    0 packet receive errors    44457 packets sentUdpLite:TcpExt:    140 invalid SYN cookies received    704 resets received for embryonic SYN_RECV sockets    23 packets pruned from receive queue because of socket buffer overrun    616402 TCP sockets finished time wait in fast timer    20 packets rejects in established connections because of timestamp    52124 delayed acks sent    45 delayed acks further delayed because of locked socket    Quick ack mode was activated 1519 times    32 SYNs to LISTEN sockets dropped    19258 packets directly queued to recvmsg prequeue.    45185 bytes directly in process context from backlog    394312 bytes directly received in process context from prequeue    943942 packet headers predicted    3478 packets header predicted and directly queued to user    3246338 acknowledgments not containing data payload received    547737 predicted acknowledgments    650 times recovered from packet loss by selective acknowledgements    Detected reordering 1 times using FACK    Detected reordering 8 times using SACK    Detected reordering 23 times using time stamp    1 congestion windows fully recovered without slow start    23 congestion windows partially recovered using Hoe heuristic    1 congestion windows recovered without slow start by DSACK    854 congestion windows recovered without slow start after partial ack    TCPLostRetransmit: 162    135 timeouts after SACK recovery    18 timeouts in loss state    1517 fast retransmits    104 forward retransmits    172 retransmits in slow start    2764 other TCP timeouts    TCPLossProbes: 5202    TCPLossProbeRecovery: 2859    74 SACK retransmits failed    460 packets collapsed in receive queue due to low socket buffer    1646 DSACKs sent for old packets    21 DSACKs sent for out of order packets    879 DSACKs received    4314 connections reset due to unexpected data    346 connections reset due to early user close    186 connections aborted due to timeout    TCPDSACKIgnoredNoUndo: 615    TCPSpuriousRTOs: 95    TCPSackShifted: 402    TCPSackMerged: 2048    TCPSackShiftFallback: 2592    TCPRcvCoalesce: 145187    TCPOFOQueue: 36673    TCPOFOMerge: 21    TCPChallengeACK: 329    TCPSYNChallenge: 47IpExt:    InNoRoutes: 2    InOctets: 1570012766    OutOctets: 1159491497    InNoECTPkts: 9838700    InECT0Pkts: 10    InCEPkts: 3

ip命令

# ip -s link1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    RX: bytes  packets  errors  dropped overrun mcast       883395575  7672258  0       0       0       0          TX: bytes  packets  errors  dropped carrier collsns     883395575  7672258  0       0       0       0      2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000    link/ether 02:7a:7d:d2:f7:21 brd ff:ff:ff:ff:ff:ff    RX: bytes  packets  errors  dropped overrun mcast       694754381  2197268  0       0       0       0          TX: bytes  packets  errors  dropped carrier collsns     296980409  1425257  0       0       0       0

sar命令

# sar -n DEV 1 Linux 3.13.0-48-generic (beta)  2015年08月17日  _x86_64_        (4 CPU)14时46分54秒     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil14时46分55秒      eth0     12.00      5.00      0.97      1.18      0.00      0.00      0.00      0.0014时46分55秒        lo     10.00     10.00      1.00      1.00      0.00      0.00      0.00      0.0014时46分55秒     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil14时46分56秒      eth0      1.00      1.00      0.05      0.47      0.00      0.00      0.00      0.0014时46分56秒        lo     16.00     16.00      2.17      2.17      0.00      0.00      0.00      0.0014时46分56秒     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s   %ifutil14时46分57秒      eth0      5.00      3.00      0.26      0.61      0.00      0.00      0.00      0.0014时46分57秒        lo     10.00     10.00      1.00      1.00      0.00      0.00      0.00      0.00

还有其它工具如nload，iftop等等，不一一列举了。