3com 4500 26-PORT User Manual

C

HAPTER

 5: U

SING

 N

ETWORK

 P

ROTOCOL

 C

OMMANDS

Any view

none

Use the 

 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: 

, 

.

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