Interlogix NS3500-28T-4S, User Manual

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Figure 4-6-3
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.
This section has the following items:

STP Global Setting
Configures STP system settings

STP Port Setting
Configuration per port STP settings

CIST Instance Setting
Configure system configuration

CIST Port Setting
Configure CIST port setting

MST Instance Setting
Configuration each MST instance settings

MST Port Setting
Configuration per port MST setting

STP Statistics
Display the STP statistics