Terms and Definitions
Fixed Switch Configuration Guide 11-15
LACP port state is disabled by default on the B5s and C5s, so we will enable LACP port state here.
We next want to set the admin keys for the stackable switch physical ports:
Stack2(rw)->set port lacp port ge.1.21 aadminkey 200 enable
Stack2(rw)->set port lacp port ge.1.22 aadminkey 200 enable
Stack2(rw)->set port lacp port ge.1.23 aadminkey 200 enable
Stack2(rw)->set port lacp port ge.1.24 aadminkey 200 enable
Stack2(rw)->set port lacp port ge.2.17 aadminkey 300 enable
Stack2(rw)->set port lacp port ge.2.19 aadminkey 300 enable
Stack2(rw)->set port lacp port ge.2.22 aadminkey 300 enable
Stack2(rw)->set port lacp port ge.2.24 aadminkey 300 enable
Next we want to change the system priority for Stack 2 so that it will be in charge of port selection
on LAGs 2 and 3:
Stack2(rw)->set lacp asyspri 100
Configuring the Server
Configuring link aggregation on the server is dependent upon the installed LACP application.
There are three aspects to link aggregation on the server you must ensure for this example:
• The admin key for LAG3 must be set to 300
• The admin keys for each NIC port must be set to 300
• The system priority for the server must be set greater than 100 to ensure that the fixed switch
stack will control port selection
This completes the example configuration.
Terms and Definitions
Table 11-7 lists terms and definitions used in this link aggregation configuration discussion.
Table 11-7 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. (See “Flexible Link Aggregation Groups” on page 11-8.)
LAG Link Aggregation Group. 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.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.
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