In the command output, the value of Input is not 0 and keeps increasing, indicating that
Eth2/0/0 receives packets from users.
2. Check whether the mirrored port is configured correctly.
Run the display port-mirroring command. The command output shows that the mirrored
port is Eth2/0/0 and the observing port is Eth2/0/3. The configuration is incorrect.
Procedure
Step 1 Run the system-view command on Router to enter the system view.
Step 2 Run the observe-port interface ethernet 2/0/1 command to configure Ethernet 2/0/1 as the
observing port.
Step 3 Run the interface ethernet 2/0/0 command to enter the view of the mirrored port.
Step 4 Run the port-mirroring to observe-port 1 inbound to observe-port inbound command to
configure port mirroring.
----End
Summary
If mirrored packets cannot be seen on the monitoring device, the possible cause is that the
mirrored port or observing port is configured incorrectly.
Mirrored Packets Cannot Be Seen on the Monitoring Device After Traffic
Mirroring Is Configured
Fault Symptom
As shown in Figure 2-6, the R&D department, sales department, and IT department are on
different network segments.
The sales department and IT department connect to the Internet through RouterA. The IT
department configures traffic mirroring on RouterA to monitor traffic sent from the R&D
department to the Internet. After the configuration is complete, the IT department cannot see
mirrored packets on the monitoring device.
Figure 2-6 Network diagram of traffic mirroring
RouterA
Monitoring
Device
Sales
Department
GE2/0/0
GE2/0/1
R&D
Department
SwitchA
10.1.1.0/24
10.1.2.0/24
Internet
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 2 System
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
24
To Next Page
Loading...
