Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 10
3Com Corporation
10-19
 Note:
When fast forwarding is functioning, the sum of input packets and the number of
forwarded packets only count in unicast packets. The likelihood exists that some other
types of packets are counted in, for example, broadcast packets sent/received before
fast forwarding is enabled and/or other types of packets sent/received after fast
forwarding fails.
10.1.18 display tcp statistics
Syntax
display tcp statistics
View
Any view
Parameter
None
Description
Use the display tcp statistics command to view TCP traffic statistic information.
The command is used to display the traffic statistic information of all the active TCP
connections. Statistics information is classified into two parts: receiving and sending,
and each part is further classified according to different types of packets. For example,
for receiving packets, there are retransmission packets number, keep-alive detection
packets number, etc. Also the statistics closely related to connection are displayed,
such as connection number received, retransmission packets number and keep-alive
detection packets number. The unit of statistics results is packet, and sometimes is
byte.
Related command: display tcp status.
Example
# Display the TCP traffic statistic information.
<3Com> display tcp statistics
Received packets:
Total: 0
packets in sequence: 0 (0 bytes)
window probe packets: 0, window update packets: 0
checksum error: 0, bad offset : 0, too short : 0
duplicate packets : 0 (0 bytes), partially duplicate packets : 0(0 bytes)