Which combinations of keywords on the channel-group interface subcommand on two neighboring switches will cause the switches to use LACP and attempt to add the link to the EtherChannel? (Choose two answers.)
- desirable and active
- passive and active
- active and auto
- active and active
Explanation: The channel-group command will direct the switch to use LACP to dynamically negotiate to add a link to an EtherChannel when the command uses the active and passive keywords, respectively. The desirable and passive keywords direct the switch to use PaGP instead of LACP. Of the four answers, the two correct answers use two LACP values, while the two incorrect answers use at least one value that would cause the switch to use PaGP, making the answer incorrect.
Of the two correct answers, both combinations result in the switches attempting to add the link to an EtherChannel using LACP as the negotiation protocol. If both switches used the passive keyword, they would both sit and wait for the other switch to begin sending LACP messages and therefore never attempt to add the link to the channel.
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