Cisco SF 200-24P Technical Information Page 190

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Cisco Small Business 200 1.1 Series Smart Switch Administration Guide 182
Configuring the Spanning Tree Protocol
The Spanning Tree Protocol (STP) (IEEE802.1D and IEEE802.1Q) is enabled by
default, set to RSTP (Rapid Spanning Tree Protocol) mode, and protects a Layer 2
Broadcast domain from broadcast storms by selectively setting links to standby
mode to prevent loops. In standby mode, these links temporarily do not transfer
user data. They are automatically re-activated when the topology changes to
make it desirable to transfer user data.
This section contains the following topics:
STP Flavors
Configuring STP Status and Global Settings
Defining Spanning Tree Interface Settings
Configuring Rapid Spanning Tree Settings
STP Flavors
Loops occur when alternate routes exist between hosts. Loops in an extended
network can cause Layer 2 switches to forward traffic indefinitely, resulting in
increased traffic and reduced network efficiency.
STP provides a tree topology for any arrangement of Layer 2 switches and
interconnecting links, creating a unique path between end stations on a network,
eliminating loops.
The switch supports the following Spanning Tree Protocol versions:
Classic STP provides a single path between any two end stations, avoiding
and eliminating loops.
Rapid STP (RSTP) detects network topologies to provide faster
convergence of the spanning tree. This is most effective when the network
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