Port Mirroring; Spanning Tree Protocol - D-Link DES-6000 User Manual

Modular Ethernet Switch User's Guide

Port Mirroring

The Switch allows you to copy frames transmitted and received on a port and redirect the copies to another
port. You can attach a monitoring device to the mirrored port, such as a sniffer or an RMON probe, to view
details about the packets passing through the first port.
To configure a mirror port, select the Slot, and source Port from where you want to copy frames in the Source
section. Next, select the Slot and target Port which will receive the copies in the Destination section. The
destination port is where you will connect a monitoring/troubleshooting device such as a sniffer or an RMON
probe. To complete the port mirroring, select Enable in the Status field and click Apply.
Note: You should not mirror a fast port onto a slower port. For example, if you try to mirror the traffic
from a 100 Mbps port onto a 10 Mbps port, this can cause throughput problems. The port you are
copying frames to should always support an equal or higher speed than the source port. Also, the
target port for the mirroring cannot be a member of a trunk group.

Spanning Tree Protocol

The Switch supports 801.2d Spanning Tree Protocol, which allows you to create alternative paths (with
multiple switches or other types of bridges) in your network. See the Spanning Tree Algorithm section of the
"Switch Management Concepts" chapter for a detailed explanation.
Web-Based Network Management
Figure 7-7. Port Mirroring window
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