Configuring Port Mirroring

DGS-3100 Series Gigabit Stackable Managed Switch User Manual

Configuring Port Mirroring

Switches inherently forward frames to relevant ports only. This creates difficulty when traffic needs to be monitored, either for information gathering (such as statistical analysis, security traces, etc.) or for troubleshooting higher-layer protocol operation. The device supports up to 8 source ports.

To enable the use of traffic analysis and monitoring devices, it is recommended enabling the user to specify that a desired ‘target’ port receives a copy of all traffic passing through a designated ‘source’ port.

In order to activate Port Mirroring, the target port must belong to the default VLAN.

1.Click L2 Features > Port Mirroring. The Port Mirroring Page opens:

Figure 3–13. Port Mirroring Page

The Port Mirroring Page contains the following fields:

Field

Status

Unit

Target Port

Source Port

Source Port Setting

Field

Unit

Tx

Rx

Both

Description

Enables or disables target port setting. The default is Disabled.

Defines the unit number.

Defines the target port.

Displays the Sniffer Mode and the source port.

Description

Selects the Unit to be displayed.

Indicates the transmit stream of data on the port.

Indicates the receive stream of data on the port.

Defines the port mirroring on both receiving and transmitting ports.

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D-Link DGS-3100 Configuring Port Mirroring, Click L2 Features Port Mirroring. The Port Mirroring Page opens, Description