3Com Switch 4500 26-Port, Configuration Manual

Page: 103 / 396

IP Performance Configuration 101
■
Use the
terminal debugging
command to output the debugging information
to the console.
■
Use the command
debugging udp packet
to enable the UDP debugging to
trace the UDP packet.
The following are the UDP packet formats:
UDP output packet:
Source IP address:202.38.160.1
Source port:1024
Destination IP Address 202.38.160.1
Destination port: 4296
■
Use the
debugging tcp packet
command to enable the TCP debugging to
trace the TCP packets.
Operations include:
[4500] terminal debugging
<4500>
debugging tcp packet
Then the TCP packets received or sent can be checked in real time. Specific packet
formats include:
TCP output packet:
Source IP address:202.38.160.1
Source port:1024
Destination IP Address 202.38.160.1
Destination port: 4296
Sequence number :4185089
Ack number: 0
Flag :SYN
Packet length :60
Data offset: 10