Modular Ethernet Switch User’s Guide
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Web-Based Network Management
STP Port Settings
Figure 7-12. STP Port Settings window
Enter the desired Spanning Tree custom settings on this screen and then click
Apply
.
The information above is described as follows:
♦
STP Status
The Spanning Tree Protocol state for a selected port can either be
Enabled
or
Disabled
.
♦
Cost
The Path Cost is a read-only parameter which is the first consideration when deciding on a
designated port for switch to switch connections. Each 10Mbps port has a predefined cost of 100.
Each 100Mbps port has an assigned Path Cost of 19. Gigabit ports have a cost of 4. Trunked ports
have a cost of (base cost) minus (no. of ports in the group).
♦
Priority
Port Priority is a read-write object that can be set from 0 to 255. The priority is used to
determine the designated port if the Path costs of redundant switch to switch connections are the
same. The higher the port priority, the more chance the port has of becoming the designated port.
Zero is the highest priority.
Forwarding and Filtering
When a packet hits the Switch, it looks in the filtering and forwarding tables to decide what to do with the
packet; either to filter it off the network, or to forward it through the port on which its destination lies.
