Configuring Layer 3 EtherChannel with Open-Standard Protocol - Exam 200-301-CCNA

Establishing Layer 3 EtherChannel with Open-Standard Protocol

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Question

Which two command sequences must be configured on a switch to establish a Layer 3 EtherChannel with an open-standard protocol? (Choose two.)

Answers

Explanations

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A. B. C. D. E.

DE.

To establish a Layer 3 EtherChannel with an open-standard protocol, the following two command sequences must be configured on a switch:

  1. Configure the GigabitEthernet interface to be a member of an EtherChannel group:
csharp
interface GigabitEthernet0/0/1 channel-group 10 mode <mode>

The channel-group command is used to configure the physical interface to be a member of a port-channel group. The mode option specifies the mode of the EtherChannel. There are four EtherChannel modes:

  • auto: The interface will only join the EtherChannel if the other end is configured with on, active, or passive.
  • on: The interface will unconditionally join the EtherChannel.
  • active: The interface will actively negotiate with the other end to form an EtherChannel.
  • passive: The interface will wait for the other end to initiate negotiation.
  1. Configure the port-channel interface with an IP address and remove the switchport configuration:
kotlin
interface port-channel 10 no switchport ip address 172.16.0.1 255.255.255.0

The no switchport command removes the switchport configuration from the interface, converting it from a Layer 2 interface to a Layer 3 interface. The ip address command is used to assign an IP address and subnet mask to the Layer 3 interface.

Therefore, the correct answers are:

B. interface GigabitEthernet0/0/1 channel-group 10 mode on D. interface GigabitEthernet0/0/1 channel-group 10 mode active

Explanation: Option B and D both configure the GigabitEthernet interface to be a member of an EtherChannel group with mode on and mode active respectively. Option A configures the interface to be a member of an EtherChannel group with mode auto, which is not the best option for configuring EtherChannel. Option C configures the port-channel interface with an IP address, but does not configure the GigabitEthernet interface to be a member of an EtherChannel group. Option E configures the port-channel interface to be a Layer 2 trunk interface, which is not what is required for a Layer 3 EtherChannel.

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