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Configuration D-Link Web Smart Switch User Manual
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Click Add to create a new surveillance component and Refresh to refresh the Auto Surveillance VLAN
summary table.
D-Link Gigabit Web Smart Switches support jumbo frames (frames larger than the Ethernet frame size of
1536 bytes) of up to 13,004 bytes (tagged). Default is Disabled. Click Enabled, and then Apply to turn on
the jumbo frame support.
L2 Functions > Jumbo Frame
Figure 4.36 – L2 Functions > Jumbo Frame
Port Mirroring is a method of monitoring network traffic that forwards a copy of each incoming and/or
outgoing packet from one port of the Switch to another port, where the packet can be studied. This enables
network managers to better monitor network performances. The function is Disabled by default. Click
Enabled to enable the function.
L2 Functions > Port Mirroring
Figure 4.37 – L2 Functions > Port Mirroring
Selection options for the Source Ports are as follows:
TX (transmit) mode: Duplicates the data transmitted from the source port and forwards it to the Target Port.
Click All to include all ports into port mirroring.
RX (receive) mode: Duplicates the data that is received from the source port and forwards it to the Target
Port. Click All to include all ports into port mirroring.
TX/RX (transmit and receive) mode: Duplicate both the data transmitted from and data sent to the source
port, and forwards all the data to the assigned Target Port. Click All to include all ports into port mirroring.
None: Turns off the mirroring of the port. Click All to remove all ports from mirroring.
Click Apply to implement the changes made.
The Loopback Detection function is used to detect the loop created by a specific port while Spanning Tree
Protocol (STP) is not enabled in the network, especially when the down links are hubs or unmanaged
switches. The Switch will automatically shut down the port and sends a log to the administrator. The
Loopback Detection port will be unlocked when the Loopback Detection Recover Time times out. The
Loopback Detection function can be implemented on a range of ports at the same time.
L2 Functions > Loopback Detection