GS1900 Series User’s Guide
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CHAPTER  26
Configuration: Spanning Tree
26.1  Overview
This section provides information for Spanning Tree in Configuration.
The Switch supports Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP) and 
Multiple Spanning Tree Protocol (MSTP) as defined in the following standards.
• IEEE 802.1D Spanning Tree Protocol
• IEEE 802.1w Rapid Spanning Tree Protocol
• IEEE 802.1s Multiple Spanning Tree Protocol
The Switch also allows you to set up multiple STP configurations (or trees). Ports can then be 
assigned to the trees.
26.2  Spanning Tree
(R)STP detects and breaks network loops and provides backup links between switches, bridges or 
routers. It allows a Switch to interact with other (R)STP-compliant switches in your network to 
ensure that only one path exists between any two stations on the network.
26.2.1  The Global Screen
Use this screen to view the Global settings. Click Configuration > Spanning Tree to open this 
screen.