Stp Global Setting - Planet Networking & Communication SGS-5240 Series User Manual

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.

4.2.10.2 STP Global Setting

Switch Management > STP > STP Global Setting page is used to configure STA status and the type of spanning tree.
 Spanning Tree Status – Enables/disables STA on this switch.
(Default: Enabled)
 Spanning Tree Type – Specifies the type of spanning tree used on this switch:

STP: Spanning Tree Protocol (IEEE 802.1D); i.e., when this option is selected, the switch will use RSTP set to STP
forced compatibility mode).

RSTP: Rapid Spanning Tree (IEEE 802.1w); RSTP is the default.

MSTP: Multiple Spanning Tree (IEEE 802.1s)
User's Manual of SGS-5240 Series Managed Switch
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