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NAC Controller PEP Network Requirements

2-4 Installation Requirements and Guidelines

Link Aggregation

LinkAggregationisamethodofgroupingmultiplephysicalportsonanetworkdeviceintoone

logicallinkaccordingtotheIEEE802.3ad‐2002standard.BecauseLinkAggregationisstandards

based,itallowsforautomaticconfigurationwithmanualoverrides(ifapplicable),andcanoperate

on10Mbps,100Mbps,or1000

MbpsEthernetfullduplexports.Thusthenetworkadministrator

cancombineagroupoffive100Mbpsportsintoalogicallink(trunk)thatfunctionsasasingle500

Mbpsport.AslongastheNACControllerPEPsagreeonwhichportsareinthetrunk,thereareno

problems

withlooping,andtheSpanningTreecantreatthistrunk asasingleport.

Innormalusage(andtypicalimplementations)thereisnoneedtoenable/disableportsforLink

Aggregation.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aggregations

willbeformedandtheNACControllerPEPswillfunctionnormally(thatis,SpanningTreewill

blockredundantpaths).

FordetailsaboutthecommandsinvolvedwithconfiguringtheLinkAggregationfunction,referto

theEnterasysMatrixDFE‐Diamond/PlatinumSeriesConfigurationGuide.

10BASE-T Network

Whenconnectinga10BASE‐Tsegmenttoanyofthefixedfrontpanelportsofthe2S4082‐25,

ensurethatthenetworkmeetstheEthernetnetworkrequirementsoftheIEEE802.3‐2002standard

for10BASE‐T.RefertotheCablingGuidefordetails.

100BASE-TX Network

Thefixedfrontpanelportsofthe2S4082‐25provideaconnectionthatsupportsCategory5UTP

cabling.ThedeviceattheotherendofthetwistedpairsegmentmustmeetIEEE802.3‐2002

100BASE‐TXFastEthernetnetworkrequirementsforthedevicestooperateat100 Mbps.Referto

theCabling

Guidefordetails.

1000BASE-T Network

The2S4082‐25 supports10/100/1000 MbpsbymeansoffixedRJ45frontpanelconnectors.These

connectionssupportcopperwireconnectionsthatcanoperateupto1000 Mbps.Thedeviceatthe

otherendofthetwistedpairsegmentmustmeetIEEE802.3‐2002networkrequirementsforthe

devicestooperateatGigabitspeed.

Note: If a port is to operate at 100 Mbps, Category 5 cabling must be used. Category 3 cabling

does not meet 100 Mbps specifications. For 10 Mbps operation only, Category 3 or Category 5

cabling can be used. Refer to “100BASE-TX Network” on page 2-4 for information about

100BASE-TX networks and cabling.

Note: The fixed ports of the NAC Controller PEP support Category 5 UTP cabling with an

impedance between 85 and 111 ohms for 100 Mbps operation. The NAC Controller PEP is capable

of operating at 10, 100, or 1000 Mbps and can automatically sense the port speed of the other

device and adjust its speed accordingly.

Note: The fixed ports of each NAC Controller PEP support Category 5 UTP cabling with an

impedance between 85 and 111 ohms for 100 and 1000 Mbps operation and can automatically

sense the port speed of the other device and adjusts its speed accordingly.

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