Chapter 1 Mirroring Configuration; Mirroring Overview; Local Port Mirroring - H3C S3100 Series Operation Manual

Operation Manual (For Soliton) – Mirroring
H3C S3100 Series Ethernet Switches

Chapter 1 Mirroring Configuration

1.1 Mirroring Overview

Mirroring refers to the process of copying packets of one or more ports (source ports) to
a destination port which is connected to a data detection device. Users can then use
the data detection device to analyze the mirrored packets on the destination port for
monitoring and troubleshooting the network.
Source
mirroring port
Figure 1-1 A port mirroring implementation
H3C S3100 series Ethernet switches support two kinds of port mirroring: local port
mirroring and remote port mirroring.
Local port mirroring: a device copies packets passing through one or more source
ports of the device to the destination port.
Remote port mirroring implements port mirroring through the remote source
mirroring group and remote destination mirroring group. The device copies the
packets of the source port to the reflector port, which then broadcasts the packets
in the remote-probe VLAN. After the remote device receives the packets, it
compares the VLAN ID of the packets with that of the remote-probe VLAN on the
remote device. If the VLAN IDs are identical, the remote device forwards the
packets to the destination port of the remote destination mirroring group.

1.1.1 Local Port Mirroring

In local port mirroring, packets passing through one or more source ports of a device
are copied to the destination port on the same device for packet analysis and
monitoring. In this case, the source ports and the destination port must be located on
the same device.
Network
Destination
mirroring port
Data detection device
PC
Chapter 1 Mirroring Configuration
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