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200-301 · Question #887

Refer to the exhibit. Which configuration establishes a Layer 2 LACP EtherChannel when applied to both switches?

The correct answer is A. Interface range G1/1 - 1/3 switchport mode trunk channel-group 1 mode active no shutdown. To establish a Layer 2 LACP EtherChannel, member interfaces should be configured as trunks and set to an active LACP negotiation mode.

Submitted by femi9· Mar 5, 2026Network Access

Question

Refer to the exhibit. Which configuration establishes a Layer 2 LACP EtherChannel when applied to both switches?

Exhibit

200-301 question #887 exhibit

Options

  • AInterface range G1/1 - 1/3 switchport mode trunk channel-group 1 mode active no shutdown
  • BInterface range G1/1 - 1/3 switchport mode access channel-group 1 mode passive no shutdown
  • CInterface range G1/1 - 1/3 switchport mode trunk channel-group 1 mode desirable no shutdown
  • DInterface range G1/1 - 1/3 switchport mode access channel-group 1 mode on no shutdown

How the community answered

(24 responses)
  • A
    79% (19)
  • B
    4% (1)
  • C
    13% (3)
  • D
    4% (1)

Why each option

To establish a Layer 2 LACP EtherChannel, member interfaces should be configured as trunks and set to an active LACP negotiation mode.

AInterface range G1/1 - 1/3 switchport mode trunk channel-group 1 mode active no shutdownCorrect

This configuration sets the interfaces to Layer 2 trunking mode, which is standard for inter-switch EtherChannels, and uses `channel-group 1 mode active`, enabling LACP negotiation where both switches actively initiate and respond to LACP packets, ensuring channel formation when applied to both.

BInterface range G1/1 - 1/3 switchport mode access channel-group 1 mode passive no shutdown

Configuring `channel-group 1 mode passive` on both switches would prevent the LACP EtherChannel from forming, as neither side would actively initiate LACP negotiation.

CInterface range G1/1 - 1/3 switchport mode trunk channel-group 1 mode desirable no shutdown

`channel-group 1 mode desirable` is a command used for PAgP (Port Aggregation Protocol) negotiation, not LACP (Link Aggregation Control Protocol).

DInterface range G1/1 - 1/3 switchport mode access channel-group 1 mode on no shutdown

`channel-group 1 mode on` forces the EtherChannel to form without any negotiation protocol, meaning it would not be a LACP EtherChannel.

Concept tested: LACP EtherChannel configuration

Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/configuration/guide/scg/swethchl.html

Topics

#EtherChannel#LACP configuration#Switchport trunk mode

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