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Difficulty: EasyLayer 2 and Layer 3 EtherChannel (LACP)

A network administrator is converting an existing Layer 2 switch port channel into a routed Layer 3 EtherChannel interface on a Cisco switch. Which interface configuration command must be executed on both the physical member interfaces and the logical Port-channel interface to enable Layer 3 IP address assignment?

  1. no switchportAnswer
  2. B
    switchport mode routed
  3. C
    ip routing
  4. D
    switchport trunk native vlan 0

Answer

The 'no switchport' command must be configured on both the physical interfaces and the Port-channel interface.
To create a routed (Layer 3) EtherChannel on a Cisco Catalyst switch, the interface must be changed from Layer 2 mode to Layer 3 mode using the 'no switchport' command. This command must be executed on both the physical member interfaces and the logical Port-channel interface before an IP address can be configured.

Step-by-Step Solution

1
Identify the requirement for establishing a Layer 3 EtherChannel
Recognize that physical switch ports default to Layer 2 switchport operation.
By default, Cisco switch ports operate in Layer 2 mode and do not accept IP addressing commands.
2
Select the proper command to convert Layer 2 ports to Layer 3 ports
Apply 'no switchport' under the physical member interfaces and the Port-channel interface.
The 'no switchport' command turns off Layer 2 processing and makes the interface operate as a routed Layer 3 interface.

Key Concept

Layer 3 EtherChannel Configuration
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Topics

Layer 2 and Layer 3 EtherChannel (LACP)

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