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128 CHAPTER 5: USING NETWORK PROTOCOL COMMANDS
display tcp statistics Syntax
display tcp statistics
View
Any view
Parameter
none
Description
Use the display tcp statistics command to view the statistics information
about TCP packets.
The statistics information about TCP packets are divided into two major kinds
which are Received packets and Sent packets. Each kind of packet is further
divided into different kinds such as window probe packets, window update
packets, duplicate packets, and out-of-order packets. Some statistics information
that is closely related to TCP connection, such as window probe packets, window
update packets, and data packets retransmitted, is also displayed. All of this
displayed information is measured in packets.
Related commands: display tcp status, reset tcp statistics.
Example
To view statistics about TCP packets, enter the following:
<4500>display tcp statistics
Received packets:
Total: 753
packets in sequence: 412 (11032 bytes)
window probe packets: 0, window update packets: 0
checksum error: 0, offset error: 0, short error: 0
duplicate packets: 4 (88 bytes), partially duplicate packets: 5 (7
bytes)
out-of-order packets: 0 (0 bytes)
packets of data after window: 0 (0 bytes)
packets received after close: 0
ACK packets: 481 (8776 bytes)
duplicate ACK packets: 7, too much ACK packets: 0
Sent packets:
Total: 665
urgent packets: 0
control packets: 5 (including 1 RST)
window probe packets: 0, window update packets: 2
data packets: 618 (8770 bytes) data packets retransmitted: 0 (0
bytes)
ACK-only packets: 40 (28 delayed)
Retransmitted timeout: 0, connections dropped in retransmitted
timeout: 0
Keepalive timeout: 0, keepalive probe: 0, Keepalive timeout, so
connections disconnected : 0
Initiated connections: 0, accepted connections: 0, established
connections: 0