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You are here: Home / SWITCH / Module 5 / Etherchannels and Link Aggregation Protocols – Protecting STP When Using EtherChannels

Etherchannels and Link Aggregation Protocols – Protecting STP When Using EtherChannels

The final section of this chapter describes the EtherChannel Guard feature, which is an optional Cisco STP feature designed to protect the Spanning Tree Protocol network when using Layer 2 EtherChannel trunks. The EtherChannel Guard feature is designed to detect an EtherChannel misconfiguration between the switch and another connected device.

For example, a misconfiguration can occur if the local switch interfaces are configured in an EtherChannel, but the interfaces on the other device are not. A misconfiguration can also occur if the channel parameters are not the same at both ends of the EtherChannel.  If the switch detects a misconfiguration . . .

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