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Dell EMC SmartFabric OS10 User Guide Release 10.5.0

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Link Aggregation Control Protocol

Group Ethernet interfaces to form a single link layer interface called a LAG or port channel. Aggregating multiple links between physical interfaces creates a single logical LAG, which balances traffic across the member links within an aggregated Ethernet bundle and increases the uplink bandwidth. If one member link fails, the LAG continues to carry traffic over the remaining links. For information about LAG load balancing and hashing, see Load balancing.

You can use LACP to create dynamic LAGs exchanging information between two systems (also called Partner Systems) and automatically establishing the LAG between the systems. LACP permits the exchange of messages on a link to:
  • Agree on the identity of the LAG to which the link belongs.
  • Move the link to that LAG.
  • Enable the transmission and reception functions.

LACP functions by constantly exchanging custom MAC PDUs across LAN Ethernet links. The protocol only exchanges packets between ports you configure as LACP-capable.

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