You are configuring an interface, and you want to enable Layer 3 mode on an EtherChannel. Which task must you perform?
A. issue the no switchport command
B. Set the channel group to desirable
C. Set the channel group to active
D. Issue the ip address command
A is correct
Wrong – no switchport command is what enable Layer 3 on an EtherChannel, because otherwise would be Layer 2. Assigning an IP is not enabling Level 3, in fact you can’t even do it if the ‘no switchport’ command was issued.
Ref.: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swethchl.html#41054