Which two commands configure a Layer 3 EtherChannel using the open-standard protocol (LACP)? (Choose two.)
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Correct answer: interface port-channel 10 no switchport ip address 172.16.0.1 255.255.255.0, interface GigabitEthernet0/0/1 channel-group 10 mode active.
Why this is the answer
The command interface GigabitEthernet0/0/1 channel-group 10 mode active configures a physical interface to be part of EtherChannel group 10 and uses LACP (Link Aggregation Control Protocol) in active mode, which actively initiates negotiation. The command interface port-channel 10 no switchport ip address 172.16.0.1 255.255.255.0 configures the logical Port-Channel interface as a Layer 3 interface by disabling switching capabilities (no switchport) and assigning an IP address. This makes it a routed interface, which is characteristic of a Layer 3 EtherChannel. mode auto is for PAgP (Cisco proprietary), not LACP. mode on forces the EtherChannel without negotiation, which is not LACP. interface port-channel 10 switchport switchport mode trunk configures the Port-Channel as a Layer 2 trunk, not a Layer 3 routed interface.
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