Interlogix NS3502-8P-2S User Manual Manual de usuario Pagina 149

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IFS NS3502-8P-2S User Manual
149
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 and 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.
4.7.2 STP System Configuration
This page allows you to configure STP system settings. The settings are used by all STP Bridge instances
in the Switch or switch Stack. The Managed Switch support the following Spanning Tree protocols:
Compatiable -- Spanning Tree Protocol (STP):Provides a single path between end stations,
avoiding and eliminating loops.
Normal -- Rapid Spanning Tree Protocol (RSTP) : Detects and uses of network topologies that
provide faster spanning tree convergence, without creating forwarding loops.
ExtensionMultiple Spanning Tree Protocol (MSTP) : Defines an extension to RSTP to
further develop the usefulness of virtual LANs (VLANs). This "Per-VLAN" Multiple Spanning
Tree Protocol configures a separate Spanning Tree for each VLAN group and blocks all but
one of the possible alternate paths within each Spanning Tree.
The STP System Configuration screen in Figure 4-7-7 appears.
Figure 4-7-7: STP Bridge Configuration page screenshot
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