GE 82-POE 用户手册

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Chapter 4: Web-Based Management 
GE-DS-82 and 82-PoE Ethernet Managed Switch User Manual 
89 
The following are the user-configurable STP parameters for the port or port group 
level: 
 
PARAMETER DESCRIPTION DEFAULT 
VALUE 
Port Priority 
A relative priority for each switch - lower numbers give a 
higher priority and a greater chance of a given switch being 
elected as the root bridge. 
128 
Port Cost 
A value used by STP to evaluate paths - STP calculates path 
costs and selects the path with the minimum cost as the 
active path. 
200,000-100Mbps 
Fast Ethernet ports 
20,000-1000Mbps 
Gigabit Ethernet ports 
0 - Auto 
Default Spanning-Tree Configuration 
 
Feature 
Default Value 
Enable state  
STP disabled for all ports 
Port priority 
128 
Port cost 
Bridge Priority 
32,768 
 
NOTE: 
The Hello Time cannot be longer than the Max. Age. Otherwise, a configuration 
error will occur. 
Observe the following formulas when setting the above parameters: 
•  Max. Age _ 2 x (Forward Delay - 1 second) 
•  Max. Age _ 2 x (Hello Time + 1 second) 
RSTP System Configuration 
This section provides RSTP-System Configuration from the Switch, the screen in 
Figure 61 appears. 
•  The user can view spanning tree information of Root Bridge. 
•  The user can modify RSTP state. After modification, click the Apply button.