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
, 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.
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