ADTRAN Total Access 5000 - Ethernet Operation, Administration, and Management; Figure C-1. Ethernet OAM (Carrier Ethernet

Total Access 5000 Business Services Deployment Guide
C-2 65K510DEP08-1A
Ethernet Operation, Administration, and Management
TwotypesofEthernetOperation,Administration,andManagement(OAM)aresupported.
OnetypeisEthernetLinkOAMdefinedbytheIEEE802.3ahstandard.EthernetLinkOAM
operatesoverasinglepoint‐to‐pointEthernetlink.TheothertypeisEthernetConnectivity
FaultManagement(CFM)definedbytheIEEE802.1agstandard.Ethernet
CFMisusedto
verifyconnectivitybetweenendpointsacrossanEthernet‐basednetworkofanynumberof
links,andasfaultsoccur,thedevicecausingthefailurecanbedeterminedthroughtheuseof
linktraceandloopback/pingmessages.
Ethernet OAM Carrier Ethernet
FigureC‐1showsatypicalTotalAccess5000E‐Linedeployment.EthernetOAMisusedin
thisapplicationtoverifytheentireEthernetpathbetweenNetVanta#1andNetVanta#2.Ifa
failureoccursatanypointinthenetwork,one(orboth)NetVantaunitswillnolongerreceive
continuity
checkmessages(CCMs)andwillbeabletoraiseanalarm.Onceanalarmis
received,linktracecanbe usedtodeterminewhichdevicescanbeseenalongthepathorto
targetspecificdevicesalongthepath.UsingthelayeredcapabilitiesofEthernetOAM,
EthernetOAMconnectionscanexist
betweenthetwoTotalAccess5000unitsorbetweenthe
twoCPErouters;however,thesewouldneedtooperateatdifferentMaintenanceDomain
(MD)levels.
Figure C-1. Ethernet OAM (Carrier Ethernet)
TheNetVanta800/8000supportscreatingMaintenanceAssociationEndPoints(MEP)withthe
followingconfigurableattributes:
•Interface‐AnyinterfacetransportingEthernetservices.
•Direction‐UporDown
–DownMEP
‐ActivesideisfurtherawayfromMACrelay/Switchthanitspassive
side.ADownMEPtransmitsCFMmessagesfromtheinterfaceitisonouttothe
physicallink.
–UpMEP‐Activesideisfurtherawayfromtheinterfaceitisonthanitspassiveside.
AnUpMEPtransmitsCFM
messagesfromtheinterfaceisonintowardstheMAC
relayofthebridge.
• Component‐ProviderorCustomer
–ProviderComponent(S‐Component)‐Aflowthatisswitchedbys‐taganddefined
byanEVC.
Total Access 5000 #1 Total Access 5000 #2
NetVanta #1
CPE Router
NetVanta #2
Network
Customer
Site
Customer
Site
CPE Router
Demarcation Demarcation
Link OAM 802.3ah
End to End OAM or multi-hop OAM 802.1ag/Y.1731