LevelOne GSW-2690 Manuale Utente

The Spanning Tree Protocol (STP) is a standardized method (IEEE 802.1D) 

for avoiding loops in switched networks.  When STP is enabled, ensure that only 
one path is active between any two nodes on the network at a time.  User can 
enable Spanning Tree Protocol on switch’s web management and then set up other 
advanced items.  We recommend that you enable STP on all switches to ensure a 
single active path on the network. 

STP Status 

Function description: 

In the Spanning Tree Status, user can read 12 parameters to know STP 
current status. The 12 parameters’ description is listed in the following table. 

 

STP State: 

Show the current STP Enabled / Disabled status. Default is “Disabled”. 

Bridge ID: 

Show switch’s bridge ID which stands for the MAC address of this switch. 

Bridge Priority: 

Show this switch’s current bridge priority setting. Default is 32768. 

Designated Root: 

Show root bridge ID of this network segment. If this switch is a root 
bridge, the “Designated Root” will show this switch’s bridge ID. 

Designated Priority: 

Show the current root bridge priority. 

Root Port: 

Show port number connected to root bridge with the lowest path cost. 

Root Path Cost: 

Show the path cost between the root port and the designated port of the 
root bridge. 

Current Max. Age: 

Show the current root bridge maximum age time. Maximum age time is 
used to monitor if STP topology needs to change. When a bridge does 
not receive a hello message from root bridge until the maximum age time 
is counted down to 0, the bridge will treat the root bridge malfunctioned 
and issue a Topology Change Notification (TCN) BPDU to all other 
bridges.