Which configurations must match on both sides of a static EtherChannel?

In configuring a static EtherChannel, it is essential that certain parameters align on both ends of the channel to ensure successful link aggregation. The correct answer highlights the need for matching duplex settings, speed configurations, and the native VLAN on both sides.

Duplex refers to the communication mode of the connection, which can be either half or full duplex. If one side is set to half duplex and the other to full duplex, it may lead to performance issues or connectivity problems. Speed must also match, as differing speeds can cause packets to drop or lead to erratic traffic behavior. Finally, the native VLAN must be consistently configured on both sides to ensure that untagged traffic is handled properly, as differing native VLANs would result in traffic being sent to the wrong VLAN, causing communication failures.

In contrast, other parameters such as VLANs assigned to the ports or IP addresses do not need to be consistent across the EtherChannel. For instance, while allowed VLANs can differ, they must be appropriately facilitated through the trunking configuration but do not directly concern the stable operation of the EtherChannel itself. Similarly, the switchport mode does not need to match in certain contexts; it only matters that both ends are consistently configured to operate as an EtherChannel. Fac