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Fast Ethernet Switching System User’s Guide
Managing the DES-5200
67
Spanning Tree Configuration
The Spanning Tree Configuration panel is used to configure the Spanning Tree
Algorithm. The Spanning Tree Algorithm (STA) in the DES-5200 enables you to
create alternative paths (using multiple switches or bridges) in your network.
These backup paths are idle until the DES-5200 determines that a problem has
developed in the primary path. If the primary path breaks down STA will activate
the backup path. STA is very complicated and you should understand it well
before changing the default settings. See Table 12: User Selective STA
Parameters.
STA Operation Levels
STA operates on the bridge level and the port level. On the bridge level, STA
calculates the Bridge Identifier for each DES-5200, then sets the Root Bridge and
the Designated Bridges. On the port level, STA sets the Root Port and Designated
Ports.
Spanning Tree Configuration Menu
The Spanning Tree Configuration menu, displayed in Figure 39, enables you to
enable or disable STA, set the bridge priority and other configurations.
Figure 39: Spanning Tree Configuration Menu
Spanning Tree Algorithm
Spanning Tree Algorithm can be enabled or disabled. Use Spanning Tree to
prevent network loops.