Planet IGS-4215 Series - Page 158

User’s Manual of IGS-4215-16T2S
158
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 setting
 CIST Instance Setting Configures system configuration
 CIST Port Setting Configures CIST port setting
 MST Instance Setting Configuration each MST instance setting
 MST Port Setting Configuration per port MST setting
 STP Statistics Displays the STP statistics