Руководство Пользователя для 3com 8807
Troubleshooting IP Performance
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Troubleshooting IP
Performance
Performance
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.
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.
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.
to the console.
■
Use the debugging udp packet command to enable the UDP debugging to
trace the UDP packet.
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.
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:
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