3Com 4210G Series, Configuration Manual, Page: 202 / 1133

12-8
Figure 12-3
Network diagram for local port mirroring configuration
Switch C
Data monitoring
device
R&D
department
Switch A
Switch B
GE1/0/2
GE1/0/1
GE1/0/3
Marketing
department
Configuration procedure
Configure Switch C.
# Create a local port mirroring group.
<SwitchC> system-view
[SwitchC] mirroring-group 1 local
# Add port GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 to the port mirroring group as source ports.
Add port GigabitEthernet 1/0/3 to the port mirroring group as the destination port.
[SwitchC] mirroring-group 1 mirroring-port GigabitEthernet 1/0/1 GigabitEthernet 1/0/2 both
[SwitchC] mirroring-group 1 monitor-port GigabitEthernet 1/0/3
# Display the configuration of all the port mirroring groups.
[SwitchC] display mirroring-group all
mirroring-group 1:
type: local
status: active
mirroring port:
GigabitEthernet1/0/1 both
GigabitEthernet1/0/2 both
monitor port: GigabitEthernet1/0/3
After finishing the configuration, you can monitor all the packets received and sent by R&D department
and Marketing department on the Data monitoring device.
Remote Port Mirroring Configuration Example
Network requirements
The departments of a company connect to each other through Ethernet switches:
z
Department 1 is connected to GigabitEthernet 1/0/1 of Switch A.
z
Department 2 is connected to GigabitEthernet 1/0/2 of Switch A.
z
GigabitEthernet 1/0/3 of Switch A connects to GigabitEthernet 1/0/1 of Switch B.
z
GigabitEthernet 1/0/2 of Switch B connects to GigabitEthernet 1/0/1 of Switch C.
z
The data monitoring device is connected to GigabitEthernet 1/0/2 of Switch C.