User's Manual

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Figure 65 Local port mirroring implementation
As shown in Figure 65, the source port GigabitEthernet 1/0/1 and monitor port GigabitEthernet 1/0/2
reside on the same device. Packets of GigabitEthernet 1/0/1 are copied to GigabitEthernet 1/0/2,
which then forwards the packets to the data monitoring device for analysis.
Configuration restrictions and guidelines
When you configure port mirroring, follow these restrictions and guidelines:
• A local mirroring group can contain multiple source ports, but only one monitor port.
• Do not enable the spanning tree feature on the monitor port.
• Use a monitor port only for port mirroring to make sure the data monitoring device receives and
analyzes only the mirrored traffic rather than a mix of mirrored traffic and other forwarded traffic.
Recommended configuration procedures
Ste
p
Remarks
1. Configure a local mirroring
group.
Required.
For more information, see "Configuring a mirroring group."
Select the mir
roring group type local in the Type list.
2. Configure source ports for
the mirroring group.
Required.
For more information, see "Configuring ports for the mirroring group."
Selec
t the port type Mirror Port.
3. Configure the monitor port
for the mirroring group.
Required.
For more information, see "Configuring ports for the mirroring group."
Selec
t the port type Monitor Port.
Configuring a mirroring group
1. From the navigation tree, select Device > Port Mirroring.