Displaying And Maintaining Port Mirroring; Port Mirroring Configuration Examples; Local Port Mirroring Configuration Example - 3Com 4210G Series Configuration Manual

When configuring the monitor port, use the following guidelines:
The port can belong to only the current mirroring group.
To ensure operation of your device, do not assign the monitor port to a mirroring VLAN.
Disable these functions on the port: STP, MSTP, and RSTP.
You are recommended to use a monitor port only for port mirroring. This is to ensure that the data
monitoring device receives and analyzes only the mirrored traffic rather than a mix of mirrored
traffic and normally forwarded traffic.

Displaying and Maintaining Port Mirroring

To do...
Display the configuration of
port mirroring groups

Port Mirroring Configuration Examples

Local Port Mirroring Configuration Example

Network requirements
The departments of a company connect to each other through Ethernet switches:
Research and Development (R&D) department is connected to Switch C through GigabitEthernet
1/0/1.
Marketing department is connected to Switch C through GigabitEthernet 1/0/2.
Data monitoring device is connected to Switch C through GigabitEthernet 1/0/3
As shown in Figure
R&D department and the marketing department through the data monitoring device.
Use the local port mirroring function to meet the requirement. Perform the following configurations on
Switch C.
Configure GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 as mirroring source ports.
Configure GigabitEthernet 1/0/3 as the mirroring destination port.
display mirroring-group { groupid | all |
local | remote-destination |
remote-source }
12-3, the administrator wants to monitor the packets received on and sent from the
Use the command...
12-7
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