3com 5500-SI Manual De Usuario

IP Performance Configuration 307

Fault: IP layer protocol works normally but TCP and UDP cannot work normally.

In the event of such a fault, you can enable the corresponding debugging information 
output to view the debugging information.

■

Use the 

 command to output the debugging information to 

the console. 

■

Use the command 

 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 

 command to enable the TCP debugging to trace 

the TCP packets.

Operations include:

[SW5500]terminal debugging

<SW5500>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

Display the total number of FIB entries 

[{begin|include 

|exclude}text]

Reset IP statistics information

Reset TCP statistics information

Reset UDP statistics information

Table 305   Displaying and Debugging IP Performance