Stp System Configuration - Planet GS-5220 Series User Manual

User's Manual of GS-5220 LCD Series
Figure 4-7-3: After Applying the STA Rules
The switch with the lowest Bridge ID (switch C) was elected the root bridge, and the ports were selected to give
a high port cost between switches B and C. The two (optional) Gigabit ports (default port cost = 20,000) on
switch A are connected to one (optional) Gigabit port on both switch B and C. The redundant link between
switch B and C is deliberately chosen as a 100 Mbps Fast Ethernet link (default port cost = 200,000). Gigabit ports
could be used, but the port cost should be increased from the default to ensure that the link between switch B
and switch C is the blocked link.

4.7.2 STP System Configuration

This page allows you to configure STP system settings. The settings are used by all STP Bridge instances in the
Switch. The Managed Switch support the following Spanning Tree protocols:
‧ Compatiable -- Spanning Tree Protocol (STP):Provides a single path between end stations, avoiding
and eliminating loops.
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