3Com 4210G Series, Configuration Manual, Page: 204 / 1133

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# Configure port GigabitEthernet 1/0/3 as a trunk port and configure the port to permit the packets of
VLAN 2.
[SwitchA] interface GigabitEthernet 1/0/3
[SwitchA-GigabitEthernet1/0/3] port link-type trunk
[SwitchA-GigabitEthernet1/0/3] port trunk permit vlan 2
2) Configure Switch B (the intermediate device).
# Configure port GigabitEthernet 1/0/1 as a trunk port and configure the port to permit the packets of
VLAN 2.
<SwitchB> system-view
[SwitchB] interface GigabitEthernet 1/0/1
[SwitchB-GigabitEthernet1/0/1] port link-type trunk
[SwitchB-GigabitEthernet1/0/1] port trunk permit vlan 2
[SwitchB-GigabitEthernet1/0/1] quit
# Configure port GigabitEthernet 1/0/2 as a trunk port and configure the port to permit the packets of
VLAN 2.
[SwitchB] interface GigabitEthernet 1/0/2
[SwitchB-GigabitEthernet1/0/2] port link-type trunk
[SwitchB-GigabitEthernet1/0/2] port trunk permit vlan 2
3) Configure Switch C (the destination device).
# Configure port GigabitEthernet 1/0/1 as a trunk port and configure the port to permit the packets of
VLAN 2.
<SwitchC> system-view
[SwitchC] interface GigabitEthernet 1/0/1
[SwitchC-GigabitEthernet1/0/1] port link-type trunk
[SwitchC-GigabitEthernet1/0/1] port trunk permit vlan 2
[SwitchC-GigabitEthernet1/0/1] quit
# Create a remote destination port mirroring group.
[SwitchC] mirroring-group 1 remote-destination
# Create VLAN 2.
[SwitchC] vlan 2
[SwitchC-vlan2] quit
# Configure VLAN 2 as the remote port mirroring VLAN of the remote destination port mirroring group.
Add port GigabitEthernet 1/0/2 to the remote destination port mirroring group as the destination port.
[SwitchC] mirroring-group 1 remote-probe vlan 2
[SwitchC] mirroring-group 1 monitor-port GigabitEthernet 1/0/2
[SwitchC] interface GigabitEthernet 1/0/2
[SwitchC-GigabitEthernet1/0/2] port access vlan 2
After finishing the configuration, you can monitor all the packets sent by Department 1 and Department
2 on the Data monitoring device.