Configuring Local Port Mirroring - 3Com 4510G Configuration Manual

You must ensure that the source device and the destination device can communicate at Layer 2 in the
remote probe VLAN.
Destination device
The destination device is the device where the monitor port is located. On it, you must create the
remote destination mirroring group.
When receiving a packet, the destination device compares the VLAN ID carried in the packet with the
ID of the probe VLAN configured in the remote destination mirroring group. If they are the same, the
device forwards the packet to the monitoring device through the monitor port.
To make the port mirroring function work properly, before configuring bidirectional traffic mirroring on a
port in a mirroring group, you need to use the mac-address mac-learning disable command on the
source device, intermediate devices, and destination device to disable the MAC address learning
function for the remote port mirroring VLAN. For more information about the mac-address
mac-learning disable command, refer to MAC Address Table Management Commands in the
System Volume.

Configuring Local Port Mirroring

Configuring local port mirroring is to configure local mirroring groups.
A local mirroring group comprises one or multiple mirroring ports and one monitor port. These ports
must not have been assigned to any other mirroring group.
Follow these steps to configure a local mirroring group:
To do...
Enter system view
Create a local mirroring group
In system view
Configure
mirroring
ports
In interface view
Configure
In system view
the
monitor
port
In interface view
Use the command...
system-view
mirroring-group groupid local
mirroring-group groupid
mirroring-port mirroring-port-list
{ both | inbound | outbound }
interface interface-type
interface-number
[ mirroring-group groupid ]
mirroring-port { both | inbound |
outbound }
quit
mirroring-group groupid
monitor-port monitor-port-id
interface interface-type
interface-number
12-3
Remarks
—
Required
Required
You can configure
mirroring ports in a
mirroring group.
In system view, you can
configure a list of
mirroring ports to the
mirroring group at a time.
In interface view, you can
assign only the current
port to the mirroring
group. To monitor
multiple ports, repeat the
step.
Required
Use either approach.