An engineer is configuring EtherChannel between two switches using PAgP. If the EtherChannel mode on switch 1 is configured using auto, which mode on switch 2 establishes an operational EtherChannel?
A. desirable
B. passive
C. active
D. auto
Which mode on switch 2 establishes an operational EtherChannel?
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/23408-140.html
PAgP and LACP Modes
This section lists the user-configurable EtherChannel modes for the channel-group interface configuration command. Switch interfaces exchange PAgP packets only with partner interfaces with the auto or desirable mode configuration. Switch interfaces exchange LACP packets only with partner interfaces with the active or passive mode configuration. Interfaces with the on mode configuration do not exchange PAgP or LACP packets.
active—Places an interface into an active negotiation state, in which the interface starts negotiations with other interfaces through the send of LACP packets.
auto—Places an interface into a passive negotiation state, in which the interface responds to PAgP packets that the interface receives but does not start PAgP packet negotiation. This setting minimizes the transmission of PAgP packets.
desirable—Places an interface into an active negotiation state, in which the interface starts negotiations with other interfaces through the send of PAgP packets.
on—Forces the interface into an EtherChannel without PAgP or LACP. With the on mode, a usable EtherChannel exists only when an interface group in the on mode has a connection to another interface group in the on mode.
passive—Places an interface into a passive negotiation state, in which the interface responds to LACP packets that the interface receives, but does not start LACP packet negotiation. This setting minimizes the transmission of LACP packets.