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

H3c s3100 series ethernet switches operation manual

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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.

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.

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.

Remote port mirroring does not require the source and destination ports to be on the same device. The

source and destination ports can be located on multiple devices across the network. Therefore,

administrators can monitor the traffic on remote devices conveniently.

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