Huawei V200R001C01 - Troubleshooting Cases

Relevant Alarms
None.
Relevant Logs
None.
2.4.3 Troubleshooting Cases
This section provides several mirroring troubleshooting cases.
Mirrored Packets Cannot Be Seen on the Monitoring Device After Port Mirroring
Is Configured
Fault Symptom
As shown in Figure 2-5, the R&D department connects to the Internet through the Router.
The IT department configures port mirroring on the Router to monitor traffic sent from the R&D
department to the Internet. Eth2/0/0 is the mirrored port, and Eth2/0/1 is the observing port.
After the configuration is complete, the IT department cannot see mirrored packets on the
monitoring device when the R&D department employees access the Internet.
Figure 2-5 Network diagram of port mirroring
Router
Monitoring
Device
Eth2/0/0
Eth2/0/1
Internet
LAN switchA
R&D
Department
User
Fault Analysis
1. Run the display interface command to check whether Eth2/0/0 receives packets from users.
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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