1-4 
Operation  Command  Description 
In system view
mirroring-group group-id 
mirroring-port 
mirroring-port-list { both | 
inbound | outbound } 
interface interface-type 
interface-number 
mirroring-group group-id 
mirroring-port { both | 
inbound | outbound } 
Configure the source 
port for the port 
mirroring group 
In port view 
quit 
Use either approach 
You can configure 
multiple source ports at 
a time in system view, 
or you can configure 
the source port in 
specific port view. The 
configurations in the 
two views have the 
same effect. 
In system view
mirroring-group group-id 
monitor-port monitor-port-id 
interface interface-type 
interface-number 
Configure the 
destination port for the 
port mirroring group 
In port view 
mirroring-group group-id 
monitor-port 
Use either approach 
The configurations in 
the two views have the 
same effect. 
 
When configuring local port mirroring, note that: 
z  You need to configure the source and destination ports for the local port mirroring to take effect. 
z  The destination port cannot be a member port of an aggregation group or a port enabled with LACP 
or STP. 
Configuring Remote Port Mirroring 
 
 
3Com Switch 4210 series can serve as a source switch, an intermediate switch, or a destination switch 
in a remote port mirroring networking environment. 
 
Configuration on a switch acting as a source switch 
1) Configuration prerequisites 
z  The source port, the reflector port, and the remote-probe VLAN are determined. 
z  Layer 2 connectivity is ensured between the source and destination switches over the 
remote-probe VLAN. 
z  The direction of the packets to be monitored is determined. 
2) Configuration procedure 
Table 1-4 Configuration on the source switch 
Operation  Command  Description 
Enter system view
 
system-view 
— 
Create a VLAN and enter the 
VLAN view
 
vlan vlan-id 
vlan-id is the ID of the 
remote-probe VLAN.