Port Trunking - D-Link DGS-3308FG User Manual

Items on the screen above include:
Cost – A port cost can be set between 1 and 65535. The lower the cost, the greater the probability the port will be
chosen as the designated port (chosen to forward packets).
Priority – A port priority can be set between 0 to 255. The lower the priority, the greater the probability the port
will be chosen as the root port.
Status – Displays the status for the corresponding port.
Group Name – Displays the previously assigned name for the STP group the corresponding port belongs to.
Fast STP – Allows you to set the delay to Enabled or Disabled.

Port Trunking

Port trunks can be used to increase the bandwidth of a network connection or to ensure fault recovery. You can configure up
to 4 trunk connections (combining 2 to 8 ports into a fat pipe) between any two DGS-3308 or other Layer 2 switches.
However, before making any physical connections between devices, use the Trunk Configuration menu to specify the trunk
on the devices at both ends. When using a port trunk, note that:
The ports used in a trunk must all be of the same media type (RJ-45, 100 Mbps fiber, or 1000 Mbps fiber).
The ports that can be assigned to the same trunk have certain other restrictions (see below).
Ports can only be assigned to one trunk.
The ports at both ends of a connection must be configured as trunk ports.
None of the ports in a trunk can be configured as a mirror source port or a mirror target port.
All of the ports in a trunk have to be treated as a whole when moved from/to, added or deleted from a VLAN.
The Spanning Tree Protocol will treat all the ports in a trunk as a whole.
Figure 7-40. STP Port Settings screen
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8-port Gigabit Ethernet Switch User's Guide