200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ415

IP Connectivity

Question Image

Refer to the exhibit. An engineer is configuring a Layer 3 port-channel interface with LACP. The configuration on the first device is complete, and it has been verified that both interfaces have registered the neighbor device in the CDP table.

Which task on the neighbor device allows the new port channel to come up without negotiating the channel?

  • A Configure the IP address of the neighboring device.
  • B Bring up the neighboring interfaces using the no shutdown command.
  • C Change the EtherChannel mode on the neighboring interfaces to auto.
  • D Modify the static EtherChannel configuration of the device to passive mode.
Explanation

Both member interfaces on the first device are already bundled with channel-group mode active, and CDP confirms the physical links to the neighbor are up, so the port channel stays down only because the neighbor is not participating in LACP negotiation with a compatible mode. Changing the neighbor's EtherChannel configuration to passive mode lets its ports respond to the active LACP requests from the first device without themselves initiating negotiation, which allows the bundle to form. Bringing up interfaces with no shutdown or adjusting IP addressing does not address the missing LACP mode, and auto is a PAgP setting rather than an LACP one.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!