Ethernet and Switching

EtherChannel Fundamentals

Learn how EtherChannel combines physical Ethernet links, how Layer 2 and Layer 3 bundles differ, and how LACP manages redundancy, standby members, minimum capacity, and automatic formation.

Intermediate15 min read
Ethernet and Switching lessonNetworkingPractice

UNTIMED COACHING

Practice before the pressure

Use feedback to correct the model, not merely memorize an option position.

GUIDED PRACTICE

Practice the lesson questions

Answer normal lesson questions without a timer. Every answer includes an explanation, and incorrect answers can be tried again before continuing.

CONCEPT MODELS

See the lesson as a system

Use these visual guides to connect the key ideas before answering the questions.

EtherChannel Capacity and ResiliencePhysical members form one logical channel, while LACP controls participation, standby behavior, and capacity requirements.
EtherChannel Capacity and ResiliencePhysical interfaces join a logical EtherChannel; LACP manages active, standby, maximum, and minimum-member behavior.
Physical interfacesSeparate paths join one bundle
Logical EtherChannelOne managed connection identity
LACP controlManages member participation
Active membersCarry traffic in the bundle
LACP Protection DecisionsLACP settings answer separate questions about replacement paths, bundle size, and acceptable remaining capacity.
LACP Protection DecisionsLACP settings divide into standby replacement, maximum membership, and minimum active capacity decisions.
LACPCoordinates EtherChannel members
Standby portsReady to replace failed members
Maximum bundleLimits permitted member count
Minimum linksSets required active capacity