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Routing & Switching · Foundational

EtherChannel

Cisco term for bundling multiple physical Ethernet links into one logical link for bandwidth and redundancy.

Definition

Members must match speed, duplex, mode (access/trunk), allowed VLANs and native VLAN. STP sees the bundle as one link, so none of the members are blocked. Negotiation uses LACP or PAgP, or static mode on. Traffic is distributed per flow by a hash.

Example

interface range Gi1/0/1-2 / channel-group 1 mode active

Exam tip

Mismatched member settings put ports in suspended state (s) in show etherchannel summary.

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