ADTRAN Total Access 5000 - Create an EVC Cross Connect; EVC Definition

Total Access 5000 Business Services Deployment Guide
5-12 65K510DEP08-1A
Create an EVC Cross Connect
Thissubsectiondetailsthefollowing information:
• DefinitionofanEVC
•GuidelinesforcreatinganEVC
•StepsforcreatinganEVC
EVC Definition
AnEVCisalogicalenti tythatprovidesameansforconnectingtwoendpointsintheTotal
Access5000andprovidesapathforEthernetframeswithaparticularVLANIDwithinthe
TotalAccess5000. TheEVCcross‐connectstwoendpointsandprovidesthemechanismby
whichanS‐tag
pathiscreatedinthesystem.TheS‐tagcorrespondstotheVLANID.
IntheTotalAccess5000,customertrafficswitchesthroughoutthesystemviaS‐tags
(outermostVLANtagonanEthernetpacket).Downstreamtrafficentersthesystemthrough
thenetworkportsontheGigESMandisS
‐tagswitchedtotheappropriateslotandPPP
group.
TheMetroEthernetForum(MEF)definesanEVCas“anassociationoftwoormoreUNIs,”
whereaUNIisastandard10/100/1000 Ethernetinterfacethatisthepointofdemarcation
betweenthe CustomerEquipment(CE)andtheMetroEthernetNetwork(MEN)
oftheservice
provider.Insimpleterms,anEVCperformstwofunctions.
• Connectstwoormoresubscribersites(UNIs)enablingthetransferofEthernetservice
frames
•PreventsdatatransferbetweenthesubscribersitesthatarenotpartofthesameEVC
ThiscapabilityenablesanEVCtoprovidedataprivacyandsecurity
similartoaFrame
RelayorATMPermanentVirtualCircuit(PVC).
EachEVCtypicallyhasanassociatedEVCVLANtagwhoseVLANIDisuniqueamongother
EVCsintheMEN.TheEVCVLANtagallowstheEVCtobeidentifiedandseparatedfrom
otherEVCs.
Ataminimum,twoitems
mustbesetupfortheEVC:theMENinterfaceitwilluseandthe
S‐tagitwilluse.
TheEVCspecifiestowhichserviceproviderVLANthenewPPPgroupinterfaceistied.Italso
specifiesthefollowing:
•TheupstreamMetroEthernetNetwork(MEN)ports:a Gigabit‐Ethernetporton
theGigE
SM,oraGig‐Elinkaggregationgroup
•TheserviceproviderVLAN(s‐tag)