HP 5820X Switch Configuration Manual page 176

Figure 64 Local port mirroring implementation
As shown in Figure 64, packets of the mirroring port are mirrored to the monitor port for the data
monitoring device to analyze.
Layer 2 remote port mirroring
Layer 2 remote port mirroring is implemented through the cooperation between a remote source mirroring
group and a remote destination mirroring group as shown in Figure 65.
Figure 65 Layer 2 remote port mirroring implementation
On the network shown in Figure 65, a remote source mirroring group is created on the source device and
a remote destination mirroring group is created on the destination device. The source device copies the
packets passing through the mirroring ports/CPUs, broadcasts the packets in the remote probe VLAN for
remote mirroring through the egress port, and transmits the packets to the destination device via the
intermediate device. When receiving these mirrored packets, the destination device compares their VLAN
IDs to the ID of the remote probe VLAN configured in the remote destination mirroring group. If the VLAN
IDs of these mirrored packets match the remote probe VLAN ID, the device forwards them to the data
monitoring device through the monitor port. In this way, the data monitoring device connected to the
monitor port on the destination device can monitor and analyze packets passing through the mirroring
ports/CPUs on the source device.
166