H3C S3100V2-52TP Configuration Manual page 98

Figure 33 Layer 2 remote port mirroring implementation
Mirroring process in the device
Eth1/0/1
Source
device
Eth1/0/1
Host
On the network shown in
The source device does the following:
Copies the packets received on the source port Ethernet 1/0/1 to the egress port Ethernet 1/0/2.
1.
Forwards the packets to the intermediate device, which then broadcasts the packets in the remote
2.
probe VLAN.
Transmits the packets to the destination device via the intermediate device.
3.
Then, the destination device does the following:
Receives the mirrored packets.
4.
Compares their VLAN IDs to the ID of the remote probe VLAN configured in the remote destination
5.
group.
If the VLAN IDs of these mirrored packets match the remote probe VLAN ID, the device forwards
6.
them to the data monitoring device through the monitor port Ethernet 1/0/2.
NOTE:
Allow remote probe VLAN to pass through the intermediate devices to make sure the source device and
•
the destination device can communicate at Layer 2 in the remote probe VLAN.
• For a mirrored packet to successfully arrive at the remote destination device, make sure the VLAN ID of
the mirrored packet is not removed or changed. Otherwise, the Layer 2 remote port mirroring
configuration will fail.
To monitor both the received and sent packets of a port in a mirroring group, you must use the
•
mac-address mac-learning disable command on the source, intermediate, and destination devices to
disable MAC address learning of the remote probe VLAN. For more information about the
mac-address mac-learning disable command, see
Layer 3 remote port mirroring
2.
Layer 3 remote port mirroring is implemented through creating a local mirroring group on both the source
device and the destination device, as shown in
Eth1/0/2
Eth1/0/2 Eth1/0/1
Intermediate
Remote probe
device
VLAN
Original packets
Mirrored packets
Figure 33,
Eth1/0/2 Eth1/0/1
Remote probe
VLAN
Source port
Monitor port
Layer 2—LAN Switch Command Reference
Figure 34.
86
Destination
device
Eth1/0/2
Data monitoring
device
Egress port
Common port
.