While configuring a switch, you noticed a configuration issue with an Ether Channel bundle. You thought you corrected the issue, but the change didn't take effect on the Ether Channel bundle. What is the mostly likely cause of this problem?

Check the ports and ensures that the proper connections are available.

Explanation:

EtherChannel Configuration Guidelines

Before implementing EtherChannel in a network, plan the following steps necessary to make it successful:

1. The first step is to identify the ports that you will use for the EtherChannel on both switches. This task helps identify any issues with previous configurations on the ports and ensures that the proper connections are available.

2. Each interface should have the appropriate protocol identified (PAgP or LACP), have a channel group number to associate all the given interfaces with a port group, and be configured whether negotiation should occur.

3. After the connections are established, make sure that both sides of the EtherChannel have formed and are providing aggregated bandwidth.