User`s guide

Configuring LAG Aggregator Keys and Priority
4-4 Configuring Link Aggregation
LACPusesasystempriorityvalue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.
Thereareafewcasesinwhichportswillnotaggregate:
•Anunderlyingphysicalportisa ttachedtoanotherportonthissameswitch(loopback).
•ThereisnoavailableaggregatorfortwoormoreportswiththesameLAGID.Thiscan
happeniftherearesimplyno
availableaggregators,orifnoneoftheaggregatorshavea
matchingadminkeyandsystempriority.
• 802.1xauthenticationisenabledusingtheseteapolcommandandportsthatwouldotherwise
aggregatearenot802.1Xauthorized.
AsshowninTable 4‐2,theLACPimplementationonMatrixDFE‐PlatinumSeries modulesorthe
N‐SAdevicewillallowasmanyportsaspossibleintoaLAG,whilethe implementationonMatrix
DFE‐GoldSeriesmoduleswillallowuptoamaximumoffourportsintoaLAG.Thedevicewith
thelowestLAGIDdetermineswhichunderlyingphysicalportsareallowedintoaLAG
basedon
theports’LAGportpriority.PortswiththelowestLAGportpriorityvaluesareallowedintothe
LAGandallothersgointoastandbystate.
Configuring LAG Aggregator Keys and Priority
Reviewing the Configuration
Bydefault,LACPwillbeenabledonallports.Aggregatoradminkeyandsystempriorityvalues
willbothbesetat32768,andnoLAGswillbeconfigured.
Usethiscommandtoreviewthecurrentconfiguration:
show lacp [port-string]
Example
Thisexampleshowshowtodisplayinformationforaggregatorport4.Inthiscase,defaultLACP
parametershavenotbeenchanged
:
Note: To aggregate, underlying physical ports must be running in full duplex mode and must be
of the same operating speed.
Matrix(rw)->show lacp lag.0.4
Aggregator: lag.0.4
Actor Partner
System Identifier: 00:e0:63:9d:b5:87 00:00:00:00:00:00
System Priority: 32768 32768
Admin Key: 32768
Oper Key: 32768 32768
Attached Ports: None.