Question

A network administrator configured an EtherChannel link with three interfaces between two switches. What is the result if one of the three interfaces is down?

A) The EtherChannel fails.
B) The remaining two interfaces continue to load balance traffic.
C) The remaining two interfaces become separate links between the two switches.
D) One interface becomes an active link for data traffic, and the other becomes a backup link.

Answer 1

If one interface in an EtherChannel goes down, the remaining interfaces continue to load balance traffic; the EtherChannel itself does not fail.

Step-by-step explanation:

When an EtherChannel is configured with multiple interfaces and one interface goes down, the EtherChannel does not entirely fail. Instead, the remaining interfaces will continue to load balance the traffic among themselves. There is a protocol in place that manages the EtherChannel configuration, such as Port Aggregation Protocol (PAgP) or Link Aggregation Control Protocol (LACP), which helps to establish the logical link and maintain traffic distribution when interface changes happen. Therefore, in this scenario, the correct answer is B) The remaining two interfaces continue to load balance traffic.