Which three interface parameters must match for an EtherChannel to form? (Choose three.)
- PortFast mode
- spanning-tree state
- allowed VLANs
- native VLAN
- EtherChannel mode
- trunking mode
Explanation: There are some EtherChannel modes that can be different and an EtherChannel will form, such as auto/desirable and active/passive. A port that is currently in the spanning tree blocking mode or has been configured for PortFast can still be used to form an EtherChannel.
Exam with this question: 6.4.4 Module Quiz - Etherchannel Answers
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