D-Link DGS-3600 Series User Manual page 151

The following STP Port Settings fields can be set:
Parameter Description
Unit
From...To
External Cost
Hello Time
®
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
Figure 7- 50. STP Port Settings window
Select the unit you wish to configure.
A consecutive group of ports may be configured starting with the selected port.
This defines a metric that indicates the relative cost of forwarding packets to the specified port
list. Port cost can be set automatically or as a metric value. The default value is 0 (auto).
0 (auto) - Setting 0 for the external cost will automatically set the speed for forwarding packets
to the specified port(s) in the list for optimal efficiency. Default port cost: 100Mbps port =
200000. Gigabit port = 20000.
value 1-200000000 - Define a value between 1 and 200000000 to determine the external cost.
The lower the number, the greater the probability the port will be chosen to forward packets.
The time interval between transmissions of configuration messages by the designated port, to
other devices on the bridged LAN. The user may choose a time between 1 and 10 seconds.
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