Network Access Intermediate ~6 min · multi-device

Bundle two links with LACP

SW1 and SW2 have two links between them: Gi0/1 and Gi0/2. Bundle them into an EtherChannel (channel-group 1) using LACP with both sides in active mode.

Topology

Objectives

○SW1 Gi0/1 in channel-group 1, LACP mode (active or passive)
○SW1 Gi0/2 in channel-group 1, LACP mode (active or passive)
○SW2 Gi0/1 in channel-group 1, LACP mode (active or passive)
○SW2 Gi0/2 in channel-group 1, LACP mode (active or passive)
○Modes across each pair are valid (at least one side active)
○Ran show etherchannel summary or show etherchannel port-channel

Hints

Hint 1, mode combos

LACP forms with active/active or active/passive. PAgP with desirable/desirable or desirable/auto. on/on = no negotiation. Never mix LACP + PAgP.

Hint 2, full sequence (per switch)

enable
configure terminal
 interface range gi0/1 - 2
  channel-group 1 mode active
  end

Tip: interface range Gi0/1 - 2 now applies commands to both ports at once.

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Network Access · ~5 min

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Two switches, one VLAN, one trunk

Network Access · ~8 min

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Bundle two links with LACP

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