Enterasys D-Series

Link Aggregation Control Protocol (LACP)
6-38 Port Configuration
is,willblockredundantpaths).Forinformationaboutbuildingstaticaggregations,refertoset
lacpstatic(page 6‐42).
EachD‐Seriesmoduleprovidessixvirtuallinkaggregatorports,whicharedesignatedintheCLI
aslag.0.1throughlag.0.6.EachLAGcanhaveuptoeightassociatedphysicalports.Once
underlying
physicalports(forexample,fe.x.x,orge.x.x)areassociatedwithanaggregatorport,
theresultingaggrega tion willberepresentedasoneLAGwithalag.x.x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.
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attached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authenti cationisenabledusingtheseteapolcommand(page 17‐19)andportsthat
wouldotherwiseaggregatearenot802.1Xauthorized.
TheLACPimplementationontheD‐Seriesdevicewillallowuptoeightphysical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otherspeedgroupingsgointoastandbystate.
When
anexistingdynamicallycreatedLAGisreducedtooneport,theD‐SeriesremovestheLAG
fromitsVLANandaddstheremainingunderlyingporttotheVLAN.Forthisreason,youshould
ensurethattheLAGandalltheportsintheLAGareassignedtotheegresslistof
thedesired
VLAN.Otherwise,whentheLAGisremoved,theremainingportmaybeassignedtothewrong
VLAN.Theotheroptionistoenablethesingleportlagfeatureasdescribedin“setlacp
singleportlag”onpage6‐44.
Commands
Note: To aggregate, underlying physical ports must be running in full duplex mode and must be of
the same operating speed.
For information about... Refer to page...
show lacp 6-39
set lacp 6-40
set lacp asyspri 6-41
set lacp aadminkey 6-41
clear lacp 6-42
set lacp static 6-42
clear lacp static 6-43
set lacp singleportlag 6-44