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Link Aggregation Control Protocol (LACP)
Matrix E1 Series (1G58x-09 and 1H582-xx) Configuration Guide 4-61
4.3.12.3 Matrix E1 LAG Usage Considerations
In normal usage (and typical implementations) there is no need to modify any of the default LACP
parameters on the Matrix E1 device. The default values will result in the maximum number of
aggregations possible. If the switch is placed in a configuration with its peers not running the
protocol, no dynamic link aggregations will be formed and the switch will function normally (that
is, will block redundant paths). For information about building static aggregations, refer to set lacp
static (Section 4.3.13.2).
Depending on the model and expansion modules installed, each Matrix E1 device can provide up
to 12 aggregator ports, which are designated in the CLI as lag.x.y. Once underlying physical ports
(i.e.; fe.x.x, or ge.x.x) are associated with an aggregator port, the resulting aggregation will be
represented as one LAG with a lag.x.y port designation. LACP determines which underlying
physical ports are capable of aggregating by comparing operational keys. Aggregator ports allow
only underlying ports with keys matching theirs to join their LAG.
There are a few cases in which ports will not aggregate:
• An underlying physical port is attached to another port on this same switch (loopback).
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 on Matrix
E1 devices will use this value to form an oper key and will determine
which underlying physical ports are capable of aggregating by
comparing oper keys. Aggregator ports allow only underlying ports
with oper keys matching theirs to join their LAG.
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.
Table 4-8 LACP Terms and Definitions (Continued)
Term Definition