Metro Ethernet Deployments And Challenges - APRICOT

Metro Ethernet deployments andchallengesYogesh Jiandani (yogeshj@cisco.com)Consulting Systems Engineer, Cisco SystemsApricot 2006 2006 Cisco Systems, Inc. All rights reserved.1

Agenda SP Ethernet and applications Metro Ethernet Basics and Service definitions Challenges and Approach to Metro EthernetApricot 2006 2006 Cisco Systems, Inc. All rights reserved.2

What Is SP Metro Ethernet?HostingMultiTenantUnit (MTU)VoIPL3VPNPSTNSTBSTB100 MbpsSPMetro EthernetNetworkEthernetRegional Headquarters Delivers an Ethernet UNI tobusinesses/subscribers forWAN/Broadband connectivity SP has multiple transport, accessand service offering options10 MbpsEthernetRemoteOffice 1RemoteOffice 210 net UNIApricot 2006 2006 Cisco Systems, Inc. All rights reserved.3

Benefits to Residential customersContent screening –Parental controlStreaming:Audio, VideoVirtual VCRVideo on iceManagementCorporateaccess:IP VPN,Voice,VideoApricot 2006ETTxETTxFocusFocusEthernet UNIInternet access 2006 Cisco Systems, Inc. All rights reserved.Entertainment - GamingSecurity;VideoSurveillance4

Benefits to Business customersETTBETTBFocusFocus Ethernet everywhere – in the LAN and theWAN Cheaper Bandwwwwidth New services viz L3VPN, L2VPN, EthernetPrivate Line .and more to come– Handle traffic according to business objectives– Support mix of different applications with differentQoS requirements and traffic profiles cepreservation – bursty & non-bursty traffic typesApricot 2006 2006 Cisco Systems, Inc. All rights reserved.5

Not just connectivity its all about packagingLarge Business andBusiness ParksSchools, HospitalLibraries, PublicCentralization of serversStorage, video transferDisaster recoveryMega Internet, Webhosting, e-mailBranch-office VPNsIP telephony, SANs, CDNsSmall Business,Shops and SOHO- Internet – surf- E-commerce- Hard-disk storage- Videoconference- Voice flat fee- SurveillanceApricot 2006- Reduced Local Loop Cost- Mega Internet- Web hosting, e-mail- HD images - telemedicine- IP phone on each teacher’sor doctor’s desk- Surveillance real timeUniversities, ResearchInstitutesIntranet: lectures,materialsInternet - surf, research,E-mailIP video, telephonyE-learningBuildings OwnersBuildings ManagersResidential- Surveillance real time- Digital recordingTriple PlayBasic package: Internet,mailboxes, voice Captive portal Video on demand DVD player Video broadcastGamingnPVR 2006 Cisco Systems, Inc. All rights reserved.6

Agenda SP Ethernet and applications Metro Ethernet Basics and Service definitions Challenges and Approach to Metro EthernetApricot 2006 2006 Cisco Systems, Inc. All rights reserved.7

Metro Ethernet Architecture and TerminologyIntegrated SystemFull ServiceEfficientCustomerEquipmentAccessLarge Scale eAccessAggregation EdgeFull ServiceCustomerEquipmentSiUser Facing Provider Edge (U-PE)U-PEMetro A10/100/1000 MbpsPE-AGGGE RingMetro CAggregator (PE-AGG)SiPPHub and10/100/Spoke1000 MbpsU-PEN-PEMPLS/IP/TDMMetro BN-PEPDWDM/CDWMP10/100/1000 MbpsRPRSONET/SDHN-PEU-PENetwork Facing Provider Edge (N-PE)Apricot 2006 2006 Cisco Systems, Inc. All rights reserved.10/100/U-PE 1000 MbpsMetro D8

Some Basic Metro Ethernet ConceptsVLAN?BPDU?802.1x?802.3ad?802.3ah UNIUNI User Network Interface (UNI)—Demarcation pointbetween service provider and service userresponsibilitiesCustomerEquipment Ethernet Virtual Connection (EVC)—Association oftwo or more UNIs; frames can only be exchangedamong the associated UNIs VLAN transparency—Ingress and egress customerVLANs are identical Layer 2 control protocol tunneling—The SP tunnelscustomer L2 control protocols in a manner that isconsistent with the data packets Bundling—Multiple customer VLANs can mapthrough a single Ethernet service on the UNI; all-toone bundling is a special case whereby all customerVLANs map to a single Ethernet service at the UNI Service multiplexing—The service provider canmultiplex multiple EVCs per a single customer UNIApricot 2006 2006 Cisco Systems, Inc. All rights reserved.9

Ethernet Wire Service (EWS) – Leased Line equivalentCPENON-Service PEMultiplexed UNIPESP IP/MPLS/SONET/SDHNetworkCPEPE802.1Q TunnelingAll to One BundlingSTS-nc/VC-m-nc/PseudowiresCPE Defines a point-to-point, port-based service No service multiplexing—“all-to-one” bundling Transparent to customer BPDUs Allows for over-subscription using stat muxing Routers and/or switches as CPE devicesApricot 2006 2006 Cisco Systems, Inc. All rights reserved.10

Ethernet Private Line (EPL) – Leased line equivalentCPEPENON-Service PEMultiplexed UNISP WDM/SONET/SDHNetworkCPEEoSSTS-nc/VC-m-ncPEWDMxWDM WavelengthAll to One BundlingCPE Defines a point-to-point, port-based service No service multiplexing—“all-to-one” bundling Transparent to customer BPDUs No oversubscription—delivered via EoS or WDM Routers and/or switches as CE devicesApricot 2006 2006 Cisco Systems, Inc. All rights reserved.11

Ethernet Relay Service (ERS) – FR equivalentCPEServicePEMultiplexed UNI802.1Q TrunkPESP seudowiresPECPE Defines a point-to-point service(analogous to Frame Relay using VLAN tags as VC IDs) Service multiplexed UNI (e.g., 802.1Q trunk) Opaque to customer PDUs (e.g., BPDUs) Recommend a router as CPE deviceApricot 2006 2006 Cisco Systems, Inc. All rights reserved.12

Ethernet Multipoint Service (EMS) a.k.a. VPLSCPENON-Service PEMultiplexed UNIPESP IP/MPLS/SONET/SDHNetworkSTS-nc/802.1Q TunnelingVC-m-nc/All to One Bundling PseudowiresCPEPECPE Multipoint service where all devices are direct peers No service multiplexing—all VLANs are presented to all sites(“all-to-one” bundling) Transparent to customer BPDUs Also called transparent LAN service (TLS), E-LAN, or VPLS Routers and/or switches as CPE devicesApricot 2006 2006 Cisco Systems, Inc. All rights reserved.13

L2 Access to the Internet and L3 VPNCPEServicePEMultiplexed UNISP MPLSNetworkBlueVRFPEISPRouterCPEOrangeVRF802.1Q TrunkPECPE ERS UNI that maps to MPLS VPN on PE L3 multipoint service that maps VLANs to VRFs Service multiplexed UNI (e.g., 802.1Q trunk) Opaque to customer PDUs (e.g., BPDUs) Recommend a router as CPE deviceApricot 2006 2006 Cisco Systems, Inc. All rights reserved.14

Summary ofEthernet-based ServicesAnalogous to Private Line; transparent to customer BPDUSimilar to ERS only w/ VLAN transparency; transparent to customer BPDUAnalogous to Frame Relay; opaque to customer BPDUHybrid ERS EMSDedicated Private LANTransparent LAN netRelayServiceMEF: teMultipointServiceRingService MEF: E-LANMPLSVPNEthernet-Based ServicesLayer 1Layer 2Point-to-PointApricot 2006 2006 Cisco Systems, Inc. All rights reserved.Layer 3Multipoint15

Agenda SP Ethernet and applications Metro Ethernet Basics and Service definitions Challenges and Approach to Metro EthernetApricot 2006 2006 Cisco Systems, Inc. All rights reserved.16

Residential & Business Service Ready NetworksChallenges faced by SPs todayPolicy-ServiceCustomerEquipmentAccess erEquipmentUNI DefinitionHow to Build theEthernet AccessHow to Build theInterconnect MediaEnable HomeNetworkingMultiple SP supportResidential & BusinessCustomer controlprotocol handlingService DefinitionLMIStandard IEEE BridgesCustomer VLAN transp.DSL/Wireless/FiberMAC address scalabilityRedundancyOAM&P, MPLS/L2TPv3Redundancy;PW – encap & signal.Auto-Discovery;EA & IM connection;OAM&P, Apricot 2006 2006 Cisco Systems, Inc. All rights reserved.17

Challenges of the Metro Ethernet Network Design Technology choice – Switching/Optical, MPLS/L2TPv3 to theaccess or in the aggregation, Interworking with FR/ATM/LL Deployment – Rings/FTTx based on density Where – Upto the end customer or only for DSL aggregation Scaling - # of VLANs and MAC addresses Security – Preventing IP address theft, MAC address limiting,DHCP Snooping, DDOS, OAM – Troubleshooting the service end to end QoS – DSCP transparency, CAC for VoD Multicast – Latency in joins Resiliency/Redundancy – faster convergence in the access withstandards based deploymentsApricot 2006 2006 Cisco Systems, Inc. All rights reserved.18

MEN Life CycleSolution choice based on business needsService Definition: Layer 2 VPN - EMS/ERMS/EWS/ERS/EPLLayer 3 VPNHigher Layer Service Integration (Content etc.)ServiceDefinitionSLA Modelsbased on the business aspectsSLA DefinitionCable layout – FTTX, CTTXPhysical layout – Rings/Spur, Hub and Spoke, Distances, Cable qualityTechnology – QinQ, VLAN, MPLS, L2TPv3Scalability - # of users, type of users, services (V/V/D) BRAS/PPPoEDevices/Equipment – RolesOptical – DWDM/CWDM/SONET/SDH/RPRSolutionArchitectureService Interworking (Ethernet to leased line, Ethernet to FR, Ethernet to any),Availability (95%/98%/99%/99.9%/99.999%), Multicast, QoS for SLAdelivery,VPLS/VPWS, Redundancy, Security, Cost identification and controlTechnologyDeploymentSolution DeploymentApricot 2006Delivery of service architecture: Optical, Switching, Routing 2006 Cisco Systems, Inc. All rights reserved.19

1) Start with the Service definitionServicesBusinessVPNL2 VPNApricot 2006SMEResidentialTriple PlayL3 VPN 2006 Cisco Systems, Inc. All rights reserved.Single PlayVideo(VoiceData(BroadcastVoD, VC,Surveillance)2nd line, Fax,PSTN)(Broadband,Local content,E-learn/game20

2) Continue with SLA definitionsPIRAPPROACH 1MBSCIRBandwidthProfilesIdentifyBest EffortThroughput Opt.Latency Opt.VoiceServiceClassesMAXService Classes with AttributesAPPROACH 2 Bandwidth profilesSimilar to Frame Relay—PIR/CIR/MBSWell-known, simple—limited traffic differentiation and per applicationnetwork capacity planning Service classesDifferentiate and traffic-engineer accordinglyApricot 2006 2006 Cisco Systems, Inc. All rights reserved.21

3) Look at the architecture approachServiceDefinitionSolutionDeploymentSLA DefinitionTechnologyDeploymentWholesale RetailArchitecture Consumer BusinessSINGLE ArchitectureIP-Data-planeSessions:Universal SubscriberEdge Provider Bridges,VPLS, VPWS, PWE3Remember the KiSS principleApricot 2006 2006 Cisco Systems, Inc. All rights reserved.22

Case Study Metro Core connects the MANs to theRegional core Regional Core connects different type ofaccess media to the service National Core connects various regionalcores EADs connect to the NPE EVC/Internet access from the NPENationalCoreRegionalCoreBuildingswitch (U-PE)Spur- Optional (H&S) 1 GE MetroMultiple rings CoreN-PEAggregation (PE-Agg)/Access switch (U-PE)Ethernet Access DomainApricot 2006 2006 Cisco Systems, Inc. All rights reserved.23

ME029127 01 2004 c1 2004 Cisco Systems, Inc. All rights reserved.24

What Is SP Metro Ethernet? Delivers an Ethernet UNI to businesses/subscribers for WAN/Broadband connectivity SP has multiple transport, access and service offering options 100 Mbps Ethernet Remote Worker/ Subscriber Regional Headquarters 10 Mbps Ethernet 10 Mbps Ethernet Subscriber SP Metro Ethernet Network Remote Office 2 Remote Office .