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Zorluk: OrtaLayer 2 and Layer 3 EtherChannel (LACP)

A network administrator is provisioning a routed Layer 3 EtherChannel bundle between a core switch and a distribution switch using the Link Aggregation Control Protocol (LACP). Which two configuration requirements or operational conditions must be met for the Layer 3 EtherChannel bundle to successfully form and forward traffic? (Select two.)

  1. The 'no switchport' command must be executed on both the logical port-channel interface and all physical member interfaces before configuring an IP address on the port-channel.Cevap
  2. B
    Both switches must have their physical member interfaces configured in LACP 'passive' mode to allow silent negotiation without generating excess control frames.
  3. At least one side of the connection must have its member interfaces configured in LACP 'active' mode to actively send LACP control packets.Cevap
  4. D
    Each physical member interface must be assigned a unique native VLAN ID prior to converting the bundle to Layer 3.

Cevap

The two correct requirements are: executing the 'no switchport' command on both the logical port-channel and physical member interfaces before assigning an IP address to the port-channel, and ensuring that at least one switch is set to LACP 'active' mode to initiate LACP negotiations.
To operationalize a Layer 3 EtherChannel, all member interfaces and the logical port-channel interface must be configured with 'no switchport' to disable Layer 2 switching before assigning an IP address to the port-channel. Additionally, LACP negotiation requires at least one end to actively transmit LACP frames by using 'active' mode.

Adım Adım Çözüm

1
Verify Layer 3 port conversion requirements
Confirm that physical member ports and the port-channel interface must have switchport functionality disabled using 'no switchport'.
Layer 3 EtherChannels act as routed interfaces. The logical port-channel interface holds the IP address, and member ports must be converted to routed ports to participate.
2
Evaluate LACP negotiation mode rules
Identify valid LACP mode pairings: active-active or active-passive.
LACP active mode sends LACP frames proactively, whereas passive mode only listens and responds. If both sides are passive, no frames are sent and the EtherChannel will not form.

Anahtar Kavram

Layer 3 EtherChannel Configuration and LACP Mode Negotiation Rules
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