display tcp statistics命令用来显示TCP连接的流量统计信息。

【命令】

display tcp statistics [ slot slot-number ]

【视图】

任意视图

【缺省用户角色】

network-admin

network-operator

【参数】

slot slot-number：显示指定成员设备的TCP连接流量统计信息。slot-number表示设备在IRF中的成员编号。如果未指定本参数，则显示所有成员设备上的TCP连接流量统计信息。

【使用指导】

display tcp statistics命令用来显示TCP连接的流量统计信息，包括接收报文、发送报文以及Syncache/syncookie等相关统计信息。

【举例】

# 显示TCP连接的流量统计信息。

Sysname display tcp statistics

Received packets:

    Total: 4150

    packets in sequence: 1366 (134675 bytes)

    window probe packets: 0, window update packets: 0

    checksum error: 0, offset error: 0, short error: 0

    packets dropped for lack of memory: 0

    packets dropped due to PAWS: 0

    duplicate packets: 12 (36 bytes),partially duplicate packets: 0 (0 bytes)

    out-of-order packets: 0 (0 bytes)

    packets with data after window: 0(0 bytes)

    packets after close: 0

    ACK packets: 3531 (795048 bytes)

    duplicate ACK packets: 33, ACK packets for unsent data: 0

Sent packets:

    Total: 4058

    urgent packets: 0

    control packets: 50

    window probe packets: 3, window update packets: 11

    data packets: 3862 (795012 bytes), data packets retransmitted: 0 (0 bytes)

    ACK-only packets: 150 (52 delayed)

    unnecessary packet retransmissions: 0

Syncache/syncookie related statistics:

    entries added to syncache: 12

    syncache entries retransmitted: 0

    duplicate SYN packets: 0

    reply failures: 0

    successfully build new socket: 12

    bucket overflows: 0

    zone failures: 0

    syncache entries removed due to RST: 0

    syncache entries removed due to timed out: 0

    ACK checked by syncache or syncookie failures: 0

    syncache entries aborted: 0

    syncache entries removed due to bad ACK: 0

    syncache entries removed due to ICMP unreachable: 0

    SYN cookies sent: 0

    SYN cookies received: 0

SACK related statistics:

    SACK recoveries: 1

    SACK retransmitted segments: 0 (0 bytes)

    SACK blocks (options) received: 0

    SACK blocks (options) sent: 0

    SACK scoreboard overflows: 0

Other statistics:

    retransmitted timeout: 0,connections dropped in retransmitted timeout: 0

    persist timeout: 0

    keepalive timeout: 21, keepalive probe: 0

    keepalive timeout, so connections disconnected: 0

    fin_wait_2 timeout, so connections disconnected: 0

    initiated connections: 29,accepted connections: 12, established connections:

23

    closed connections: 50051(dropped: 0, initiated dropped: 0)

    bad connection attempt: 0

    ignored RSTs in the window: 0

    listen queue overflows: 0

    RTT updates: 3518(attempt segment: 3537)

    correct ACK header predictions: 0

    correct data packet header predictions: 568

    resends due to MTU discovery: 0

    packets dropped due to MD5 authentication failure: 0

    packets that passed MD5 authentication: 0

    sent Keychain-encrypted packets: 0

    packets that passed Keychain authentication: 0

    packets dropped due to Keychain authentication failure: 0

表1-6 display tcp statistics命令显示信息描述表