Layer 3 EtherChannel IP Configuration

A

When a network administrator creates a layer 3 EtherChannel, they are essentially bundling multiple physical interfaces into a logical interface, which is called a port channel or an EtherChannel. This logical interface is then configured with a single IP address that is used as the gateway for the devices on the network.

The IP address for the EtherChannel interface can be configured in one of the member interfaces or in the port-channel interface itself. The correct answer to this question is A. the port-channel 1 interface.

When an IP address is configured on the port-channel interface, it is automatically propagated to all the member interfaces of the EtherChannel. This means that all the member interfaces will have the same IP address, and any traffic that is sent to that IP address will be load-balanced across the member interfaces.

Configuring the IP address on one of the member interfaces is not recommended, as it can lead to unpredictable behavior when the EtherChannel is under heavy load or when one of the member interfaces fails. In addition, if the member interface with the IP address fails, the IP address will no longer be reachable.

As for the other answer choices:

• The highest number member interface (B) is not relevant to where the IP address is configured.
• Configuring the IP address on all member interfaces (C) is not necessary and can cause unnecessary duplication and inconsistency.
• Configuring the IP address on the lowest number member interface (D) is not a best practice and may not be practical in all scenarios.