Cisco Systems 200 Manual De Usuario
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Cisco Small Business 200 Series Smart Switch Administration Guide
194
Spanning Tree
This section describes the Spanning Tree Protocol (STP) (IEEE802.1D and
IEEE802.1Q) and covers the following topics:
IEEE802.1Q) and covers the following topics:
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STP Flavors
STP 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 stop transferring user data. After the topology changes so that the
data transfer is made possible, the links are automatically re-activated.
setting links to standby mode to prevent loops. In standby mode, these links
temporarily stop transferring user data. After the topology changes so that the
data transfer is made possible, the links are automatically re-activated.
Loops occur when alternate routes exist between hosts. Loops in an extended
network can cause switches to forward traffic indefinitely, resulting in increased
traffic load and reduced network efficiency.
network can cause switches to forward traffic indefinitely, resulting in increased
traffic load and reduced network efficiency.
STP provides a tree topology for any arrangement of switches and
interconnecting links, by creating a unique path between end stations on a
network, and thereby eliminating loops.
interconnecting links, by creating a unique path between end stations on a
network, and thereby eliminating loops.
The device supports the following Spanning Tree Protocol versions:
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Classic STP – Provides a single path between any two end stations, avoiding
and eliminating loops.
and eliminating loops.
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Rapid STP (RSTP) – Detects network topologies to provide faster
convergence of the spanning tree. This is most effective when the network
convergence of the spanning tree. This is most effective when the network