D-Link DES-3624 - Switch - Stackable User Manual - page 110
Stackable NWay Ethernet Switch User’s Guide
110
Web-Based Network Management
Port Mirroring
Figure 7-7. Port Mirroring window
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 Switch, Slot, and source Port from where you want to copy frames in the Source
section. Next, select the Switch, Slot, target Port, and port Type of the port which will receive the copies from the source
port in the Destination section. This is the port 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 from
should always support an equal or lower speed than the port to which you are sending the copies. 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.