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Two Switches have been configured with an ether-channel bundle to provide higher bandwidth and protection against single interface failure. On SW1 the PAgP mode is set to ON and on SW2 the PAgP is set to AUTO. What is the result of such configuration?
The Ether-channel 3 will not be formed and an "ErrDisabled" will be displayed on the interface.
The Ether-channel 3 will not be formed and its interface status will be "Administratively shutdown".
The Ether-channel will not be negotiated and the interface status will be "down".
The Ether-channel 3 will be negotiated and formed.
The Ether-channel 3 will be formed but will remain unstable.
PAgP is the protocol used to negotiate Ether-channel bundles. Some modes can coexist and form a channel other modes cannot be configured together to form a channel. The only three combinations of PAgP mode that can make a Channel bundle are: Desirable with Desirable, Desirable with auto, and ON with ON. The other combinations will not form a bundle and will set the interfaces status to Err-Disabled. For more information refer to: http://www.informit.com/library/content.aspx?b=CCNPStudiesSwitching&seqNum=27
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