Interlogix NS3550-8T-2S User Manual - Manual (Page 126)

User’s Manual of NS3550-8T-2S
126
Figure 4-7-2: Before Applying the STA Rules
For this example, only the default STP values are used.
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