3com 8807 사용자 가이드

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

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

■

Use the display command to view the running information of IP performance 
and make sure that the PCs used by the user is running normally.

■

Use the terminal debugging command to output the debugging information 
to the console.

■

Use the debugging udp packet 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

 

task = ROUT(15)

 

socketid = 6,

 

src = 192.168.1.1:520,

 

dst = 255.255.255.255:520,

 

datalen = 24 

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Use the debugging tcp packet command to enable the TCP debugging to 
trace the TCP packets.

Operations include:

<SW8800>  terminal debugging

 

<SW8800> 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

 

task = ROUT(15)

 

socketid = 5

 

state = Established

 

src = 172.16.1.2

 

Source port:1025

 

dst = 172.16.1.1

 

Destination port: 4296

 

seq = 1921836502

 

ack = 4192768493