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Etherchannel is enabled on two links between two switches. If one of the links fails, how would STP react?
STP does not recalculate the tree.
STP would use the alternate port.
STP needs to re-elect Root Bridge.
STP assigns a backup port.
EtherChannel bundles multiple links into a single link, allowing STP messages "BDPUs" travel through a single link. If a link inside the EtherChannel fails, the channel itself assigns a new link inside the channel, not affecting the behavior or STP. For more information refer to: http://en.wikipedia.org/wiki/EtherChannel
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