Enterasys-networks 9034385 Manuale Utente Pagina 55

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Survey the Network
Enterasys NAC Design Guide 4-3
ThenetworkshowninFigure 41below,illustratesthefollowingthreeexamplesofhowthe
intelligentedgecanbeimplementedinanetwork.
PolicyenabledEnterasysdevicesatthephysicaledgeofthenetwork.
TheSecureStackB2/B3,SecureStackC2/C3,andMatrixNseriesswitchesaretheintelligent
edgeofthenetwork
aswellasthephysicaledgeofthenetwork.Thesepolicyenableddevices
provideauthenticationandauthorizationviapolicyenforcementtotheconnectingend
systems.
•ThirdpartyswitchesthatsupportRFC3580withdynamicVLANassignmentatthe
physicaledgeofthenetwork.
RFC3580compliantswitches(Enterasysandthirdparty),
arealsopartoftheintelligentedge
ofthenetwork,becausetheyareabletoauthenticateandauthorizeconnectingendsystems
withaparticularlevelofnetworkaccess,usingdynamicVLANassignment.
•PolicyenabledEnterasysdevicesatthedistributionlayerofthenetwork,upstreamfrom
nonintelligentthirdpartydevices.
Theintelligent
edgeofthenetworkmayormaynotbethephysicaledgeofthenetworkwhere
endsystemsactuallyconnect.TheMatrixNseriesswitchinthedistributionlayerofthe
network,upstreamfromthenonintelligentthirdpartydevice,isalsoconsideredpartofthe
intelligentedgeofthe
network.ThisisbecausetheMatrixNseriesswitchcanindividually
authenticateanduniquelyallocatenetworkresourcesfortheendsystemsconnected
downstreamtothenonintelligentthirdpartyaccesslayerdevice.
Figure 4-1 Network with Intelligent Edge
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