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Operation Manual – IP Address and Performance Confiugration

H3C S3600 Series Ethernet Switches-Release 1510 Chapter 2

IP Performance Configuration

2-4

2.3 Troubleshooting

Symptom: IP packets are forwarded normally, but TCP and UDP cannot work normally.

Solution: Enable the corresponding debugging information output to view the

debugging information.

z Use the display command to display the IP performance and check whether the

PC runs normally.

z Use the terminal debugging command to enable debugging information to be

output to the console.

z Use the debugging udp packet command to enable the UDP debugging to trace

UDP packets.

<H3C> terminal debugging

<H3C> debugging udp packet

The UDP packets are shown in the following format:

UDP output packet:

Source IP address:202.38.160.1

Source port:1024

Destination IP Address 202.38.160.1

Destination port: 4296

z Use the debugging tcp packet command to enable the TCP debugging to trace

TCP packets.

<H3C> terminal debugging

<H3C> debugging tcp packet

Then the TCP packets received or sent will be displayed in the following format in real

time:

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

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