PLANET FGSW-2840 - Manual (Page 120)

User’s Manual of FGSW-2840 / FGSW-4840S
4.5.1.1 STP Config
Before configuring spanning trees, it should make clear the roles each Managed Switch plays in each spanning tree instance.
Only one Managed Switch can be the root bridge in each spanning tree instance. On this page you can globally configure the
spanning tree function and related parameters.
The screen in Figure 4-5-6 appears.
Figure 4-5-6: STP Config Page Screenshot
The page includes the following fields:
Object Description
Global Config
 STP Select Enable/Disable STP function globally on the Managed Switch.

Version Select the desired STP version on the Managed Switch.
 STP: Spanning Tree Protocol.
 RSTP: Rapid Spanning Tree Protocol.
 MSTP: Multiple Spanning Tree Protocol.
Parameters Config

CIST Priority
Enter a value from 0 to 61440 to specify the priority of the Managed Switch for
comparison in the CIST. CIST priority is an important criterion on determining the
root bridge. In the same condition, the Managed Switch with the highest priority
will be chosen as the root bridge. The lower value has the higher priority. The
default value is 32768 and should be exact divisor of 4096.
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