NAC Controller PEP Network Requirements
2-4 Installation Requirements and Guidelines
Link Aggregation
LinkAggregationisamethodofgroupingmultiplephysicalportsonanetworkdeviceintoone
logicallinkaccordingtotheIEEE802.3ad‐2002standard.BecauseLinkAggregationisstandards
based,itallowsforautomaticconfigurationwithmanualoverrides(ifapplicable),andcanoperate
on10Mbps,100Mbps,or1000MbpsEthernetfullduplexports.Thusthenetworkadministrator
cancombineagroupoffive100Mbpsportsintoalogicallink(trunk)thatfunctionsasasingle500
Mbpsport.AslongastheNACControllerPEPsagreeonwhichportsareinthetrunk,thereareno
problemswithlooping,andtheSpanningTreecantreatthistrunkasasingleport.
Innormalusage(andtypicalimplementations)thereisnoneedtoenable/disableportsforLink
Aggregation.Thedefaultvalueswillresultinthemaximumnumberofaggregationspossible.If
theswitchisplacedinaconfigurationwithitspeersnotrunningtheprotocol,noaggregations
willbeformedandtheNACControllerPEPswillfunctionnormally(thatis,SpanningTreewill
blockredundantpaths).
FordetailsaboutthecommandsinvolvedwithconfiguringtheLinkAggregationfunction,referto
theEnterasysMatrixDFE‐Diamond/PlatinumSeriesConfigurationGuide.
10BASE-T Network
Whenconnectinga10BASE‐Tsegmenttoanyofthefixedfrontpanelportsofthe2S4082‐25,
ensurethatthenetworkmeetstheEthernetnetworkrequirementsoftheIEEE802.3‐2002standard
for10BASE‐T.RefertotheCablingGuidefordetails.
100BASE-TX Network
Thefixedfrontpanelportsofthe2S4082‐25provideaconnectionthatsupportsCategory5UTP
cabling.ThedeviceattheotherendofthetwistedpairsegmentmustmeetIEEE802.3‐2002
100BASE‐TXFastEthernetnetworkrequirementsforthedevicestooperateat100 Mbps.Referto
theCablingGuidefordetails.
1000BASE-T Network
The2S4082‐25 supports10/100/1000 MbpsbymeansoffixedRJ45frontpanelconnectors.These
connectionssupportcopperwireconnectionsthatcanoperateupto1000 Mbps.Thedeviceatthe
otherendofthetwistedpairsegmentmustmeetIEEE802.3‐2002networkrequirementsforthe
devicestooperateatGigabitspeed.
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.