D-Link DGS-1216T - Switch, Руководство пользователя

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Trunk Setting
The Trunk function enables to cascade two or more devices with a
larger bandwidths.
There are two Trunk groups to be set; and there are default ports in
each member. Checked “Enable” to use the trunk function, select
the ports in each member to be trunk, and click “Apply” to activate
the selected trunk group.
Figure 21. Trunk Settings
Be sure that the selected trunk setting port must connect to the
device with a same VLAN group.
Mirror Setting
Port Mirroring is a method of monitoring network traffic that forwards
a copy of each incoming and/or outgoing packet from one port of a
network switch to another port where the packet can be studied. It
enables the manager to keep close track of switch performance and
alter it if necessary.
Configuring the port mirroring by assigning a source port from which
to copy all packets and a sniffer port where those packets will be sent.