One EtherChannel Member Refuses to Bundle

Situation

SW1 and SW2 should bundle E0/0-E0/2 into Po1. show etherchannel summary shows Po1, but E0/2 is not bundled.

Evidence

E0/0 and E0/1 are trunks on both sides. On SW2, E0/2 was accidentally configured as an access port.

Your task

Would rebooting the switch help? Which outputs prove a member-compatibility problem?

Investigation

SW2# show etherchannel summary
SW2# show interfaces ethernet 0/2 switchport
SW2# show running-config interface ethernet 0/2
SW2# show lacp neighbor

Root cause and fix

EtherChannel members need compatible Layer-2 settings. Restore E0/2 so it matches the intended bundle, then verify that it rejoins Po1.