PLANET FGSW-1816HPS - Manual (Page 66)

User’s Manual of FGSW-1816HPS
66
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 Bridge Settings Configures STP Bridge settings
。 STP Port Settings Configure STP port setting
。 Loopback Detection Configuration Loopback Detection settings
4.7.1 STP Bridge Settings
The STP System Configuration screen in Figure 4-7-4 appears.
Figure 4-7-4 STP Bridge Setting page screenshot
The page includes the following fields:
Object Description
 STP Mode Select STP mode for this drop-down list.
-Disable
-STP
-RSTP
 Bridge Priority
(0~61440)
Controls the bridge priority. Lower numeric values have better priority. The bridge
priority plus the MSTI instance number, concatenated with the 6-byte MAC
address of the switch forms a Bridge Identifier.
 Hello Time
(1~10 Sec) The time that controls the switch to send out the BPDU packet to check STP