display tcp statistics

Function

The display tcp statistics command displays TCP traffic statistics.

Format

display tcp statistics

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command displays TCP traffic statistics including different types of received and sent packets. For example, duplicate received packets and packets with checksum errors. In addition, connection-related statistics are displayed, for example, times of accepted connections, the number of retransmitted packets, and the number of keepalive packets.

Most of the preceding statistics are expressed in number of packets, and some of them are expressed in number of bytes.

Example

# Display TCP traffic statistics.

<HUAWEI> display tcp statistics
Received packets:
     Total: 0
     Total(64bit high-capacity counter): 0
     packets in sequence: 0 (0 bytes)
     window probe packets: 0, window update packets: 0
     checksum error: 0, offset error: 0, short error: 0

     duplicate packets: 0 (0 bytes), partially duplicate packets: 0 (0 bytes)
     out-of-order packets: 0 (0 bytes)
     packets of data after window: 0 (0 bytes)
     packets received after close: 0

     ACK packets: 0 (0 bytes)
     duplicate ACK packets: 0, too much ACK packets: 0

Sent packets:
    Total: 0
     Total(64bit high-capacity counter): 0
     urgent packets: 0
     control packets: 0 (including 0 RST)
     window probe packets: 0, window update packets: 0

     data packets: 0 (0 bytes),    data packets retransmitted: 0 (0 bytes)
     ACK-only packets: 0 (0 delayed)

Other information:
    Retransmitted timeout: 0, connections dropped in retransmitted timeout: 0
    Keep alive timeout: 0, keep alive probe: 0,     Keep alive timeout, so connections disconnected : 0
    Initiated connections: 0,     accepted connections: 0, established connections: 0
    Closed connections: 0 (    dropped: 0, initiated dropped: 0)
    Packets dropped with MD5 authentication: 0
    Packets permitted with MD5 authentication: 0
    Send Packets permitted with Keychain authentication: 0
    Receive Packets permitted with Keychain authentication: 0
    Receive Packets Dropped with Keychain authentication: 0

**Table 1** Description of the **display tcp statistics** command output
Item	Description
Received packets	Statistics about received packets.
Total	Total number of packets.
Total (64bit high-capacity counter)	Total number of packets, using the 64-bit counter.
packets in sequence (bytes)	Number of bytes in the packets that arrive in order.
window probe packets	Number of window probe packets.
window update packets	Number of window update packets.
checksum error	Number of packets with checksum errors.
offset error	Number of packets with offset errors.
short error	Number of packets whose length is too short.
duplicate packets (bytes)	Number of bytes in the duplicate packets.
partially duplicate packets (bytes)	Number of bytes in partially duplicate packets.
out-of-order packets (bytes)	Number of bytes in the out-of-order packets.
packets of data after window (bytes)	Number of bytes in the packets whose size is greater than the window size.
packets received after close	Number of packets that arrive after a connection is closed.
ACK packets (bytes)	Number of acknowledged packets, in bytes.
duplicate ACK packets	Number of re-acknowledged packets.
too much ACK packets	Number of acknowledged packets with no data sent.
Sent packets	Number of sent packets.
urgent packets	Number of urgent packets.
control packets (RST)	Number of control packets (RST packets).
data packets	Number of data packets.
data packets retransmitted (0 bytes)	Number of bytes in the retransmitted packets.
ACK only packets (delayed)	Number of acknowledged packets that are delayed.
Other information	Other information.
Retransmitted timeout	Timeout interval of the retransmission timer.
connections dropped in retransmitted timeout	Number of connections discarded because the number of retransmission times exceeds the threshold.
Keep alive timeout	Timeout interval of the keepalive timer.
keep alive probe	Number of sent keepalive packets.
Keep alive timeout, so connections disconnected	Number of connections discarded because keepalive probe fails.
Initiated connections	Number of initiated connections.
accepted connections	Number of accepted connections.
established connections	Number of established connections.
Closed connections (dropped, initiated dropped)	Number of closed connections (number of discarded packets after a connection is set up or before a connection is set up).
Packets dropped with MD5 authentication	Number of packets that fail to pass MD5 authentication.
Packets permitted with MD5 authentication	Number of packets that pass MD5 authentication.
Send Packets permitted with Keychain authentication	Number of sent packets that carry keychain options.
Receive Packets permitted with Keychain authentication	Number of received packets that pass keychain authentication.
Receive Packets Dropped with Keychain authentication	Number of received packets that fail to pass keychain authentication.