From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access
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Spanning tree protocol
From the course: Cisco CCNA (200-301) Cert Prep: 1 Network Fundamentals and Access
Spanning tree protocol
- In a layer two network, one of the major dangers for any administrator is a switching loop. This occurs when any frame is flooded into a switch network that contains redundant links with no protection. These packets will loop infinitely, and as they do so, will consume more and more resources on the switch, until they are completely exhausted. Just one frame can crash a modern switch network in a matter of seconds. A technology known as Spanning Tree Protocol was developed to prevent this exact behavior. There are several flavors of STP, but at their core, most seek to find redundant links, and stop forwarding of frames over them, thus preventing loops. STP starts by electing a route bridge. Imagine the structure of an STP instance as a tree, hence the name Spanning Tree. The root bridge is the very base of the tree, from which everything else grows. The root bridge, has all of its up interfaces forwarding traffic. Every subsequent switch connected at the tree from the root, will…
Contents
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Switching concepts3m 10s
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(Locked)
VLANs3m 49s
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(Locked)
VLAN trunking4m 41s
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(Locked)
Layer 2 discovery protocols2m 33s
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(Locked)
EtherChannels6m 9s
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(Locked)
Spanning tree protocol4m 36s
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(Locked)
Wireless frequencies4m 44s
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Wireless principles2m 26s
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(Locked)
Wireless security3m 9s
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(Locked)
Wireless architectures and AP modes3m 31s
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(Locked)
AP connections and management protocols2m 49s
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(Locked)
WLC client configuration4m 15s
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