display tcp statistics
Syntax
display tcp statistics [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use display tcp statistics to display statistics of TCP traffic.
Related commands: display tcp status and reset tcp statistics.
Examples
# Display statistics of TCP traffic.
<Sysname> display tcp statistics
Received packets:
Total: 8457
packets in sequence: 3660 (5272 bytes)
window probe packets: 0, window update packets: 0
checksum error: 0, offset error: 0, short error: 0
duplicate packets: 1 (8 bytes), partially duplicate packets: 0 (0 bytes)
out-of-order packets: 17 (0 bytes)
packets of data after window: 0 (0 bytes)
packets received after close: 0
ACK packets: 4625 (141989 bytes)
duplicate ACK packets: 1702, too much ACK packets: 0
Sent packets:
Total: 6726
urgent packets: 0
control packets: 21 (including 0 RST)
window probe packets: 0, window update packets: 0
data packets: 6484 (141984 bytes) data packets retransmitted: 0 (0 bytes)
ACK-only packets: 221 (177 delayed)
Retransmitted timeout: 0, connections dropped in retransmitted timeout: 0
Keepalive timeout: 1682, keepalive probe: 1682, Keepalive timeout, so connections disconnected : 0
Initiated connections: 0, accepted connections: 22, established connections: 22
Closed connections: 49 (dropped: 0, initiated dropped: 0)
Packets dropped with MD5 authentication: 0
Packets permitted with MD5 authentication: 0
Table 27: Command output
Field | Description | |
|---|---|---|
Received packets: | Total | Total number of packets received. |
packets in sequence | Number of packets arriving in sequence. | |
window probe packets | Number of window probe packets received. | |
window update packets | Number of window update packets received. | |
checksum error | Number of checksum error packets received. | |
offset error | Number of offset error packets received. | |
short error | Number of received packets with length being too small. | |
duplicate packets | Number of completely duplicate packets received. | |
partially duplicate packets | Number of partially duplicate packets received. | |
out-of-order packets | Number of out-of-order packets received. | |
packets of data after window | Number of packets outside the receiving window. | |
packets received after close | Number of packets that arrived after connection is closed. | |
ACK packets | Number of ACK packets received. | |
duplicate ACK packets | Number of duplicate ACK packets received. | |
too much ACK packets | Number of ACK packets for data unsent. | |
Sent packets: | Total | Total number of packets sent. |
urgent packets | Number of urgent packets sent. | |
control packets | Number of control packets sent. | |
window probe packets | Number of window probe packets sent. In the brackets are resent packets. | |
window update packets | Number of window update packets sent. | |
data packets | Number of data packets sent. | |
data packets retransmitted | Number of data packets retransmitted. | |
ACK-only packets | Number of ACK packets sent. In brackets are delayed ACK packets. | |
Retransmitted timeout | Number of retransmission timer timeouts. | |
connections dropped in retransmitted timeout | Number of connections broken due to retransmission timeouts. | |
Keepalive timeout | Number of keepalive timer timeouts. | |
keepalive probe | Number of keepalive probe packets sent. | |
Keepalive timeout, so connections disconnected | Number of connections broken due to timeout of the keepalive timer. | |
Initiated connections | Number of connections initiated. | |
accepted connections | Number of connections accepted. | |
established connections | Number of connections established. | |
Closed connections | Number of connections closed. In brackets are connections closed accidentally (before receiving SYN from the peer) and connections closed initiatively (after receiving SYN from the peer). | |
Packets dropped with MD5 authentication | Number of packets dropped by MD5 authentication. | |
Packets permitted with MD5 authentication | Number of packets permitted by MD5 authentication. | |