Link Aggregation Configuration Terms and Definitions lists terms and definitions used in this link aggregation configuration discussion.
Link Aggregation Configuration Terms and Definitions
| Term | Definition |
|---|---|
| Aggregator | Virtual port that controls link aggregation for underlying physical ports. Each device provides aggregator ports, which are designated in the CLI as lag.0.1 through lag.0.x (depending upon the device, see Extreme Networks Platform LAG Support for LAG resources available on your device). |
| LAG | Link Aggregation Group. Once underlying physical ports (i.e.; ge.x.x) are associated with an aggregator port, the resulting aggregation will be represented as one LAG with a lag.x.x port designation. |
| LACPDU | Link Aggregation Control Protocol Data Unit. The protocol exchanges aggregation state/mode information by way of a port‘s actor and partner operational states. LACPDUs sent by the first party (the actor) convey to the second party (the actor‘s protocol partner) what the actor knows, both about its own state and that of its partner. |
| Actor and Partner | An actor is the local device sending LACPDUs. Its protocol partner is the device on the other end of the link aggregation. Each maintains current status of the other via LACPDUs containing information about their ports‘ LACP status and operational state. |
| Admin Key | Value assigned to aggregator ports and physical ports that are candidates for joining a LAG. The LACP implementation uses this value to determine which underlying physical ports are capable of aggregating by comparing keys. Aggregator ports allow only underlying ports with admin keys that match the aggregator to join their LAG. |
| Port Priority | Port priority determines which physical ports are moved to the attached state when physical ports of differing speeds form a LAG. Port priority also determines which ports will join a LAG when the number of supported ports for a LAG is exceeded. |
| System Priority | Value used to build a LAG ID, which determines aggregation precedence. If there are two partner devices competing for the same aggregator, LACP compares the LAG IDs for each grouping of ports. The LAG with the lower LAG ID is given precedence and will be allowed to use the aggregator. |
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