Ethernet Services over Packet Aware Transport final.ppt


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  • Clavenna
  • Managed Ethernet access has the potential for higher packet efficiency than NG SONET/SDH if advantage is taken of over-subscription in the aggregation network. Given a very low-cost CPE and reliance on a native Ethernet link, CapEx is less than any of the other discussed solutions. Managed Ethernet access architectures provide savings also in direct OpEx. The simpler architecture requires less upfront planning/management time and less field time during installation and maintenance. It is important to point out that although managed Ethernet access is a clear step toward a packet-based future, it retains the advantages of a connection-oriented transport model, requiring no radical change to existing operational models. Full, carrier-class OAM combined with operational simplicity make the solution easy to implement and scale. The link between CPE and the service layer is transparent – and also predictable and secure, even under failure conditions. Therefore fault finding is deterministic, quick and easy. The architecture fits existing access layer models. Local staff understand the point-to-point paradigm. The whole processes for adds, repairs, and changes fit existing models. Less cross-training / hiring of LAN-skilled staff required. Lower CAPEX: The core is insulated from, and synergized by, access scale & volume Lower OPEX: Simple provisioning and replacement, little configuration required, low skill set needed to turn up service Fewer faults due to simpler forwarding, fast fault isolation = less customer service down time Sparing and replacement simple Service migration simplicity Same building blocks regardless of service type Scalable - carrier class Access investment protection: the access network insulated from changes in core (core network technology churn 2-3 years)
  • Some carriers may prefer to have a L2 switched layer under the core, rather than connecting directly from an FSP 150 access infrastructure into the metro core. Both are possible, and the points that were made on previous slides hold true: Switching buys dynamic connectivity at the price of scalability. I.e. with L2 switches connectivity among users can be provided before reaching the core. But: Operational complexity limits the scale of those L2 islands. Some of the large solution vendors such as Siemens have a L2 switching component in the carrier-Ethernet story. Regardless of the existence of such a layer, however, the FSP 150 always adds value multiplying ports for the first mile and providing clean and low cost demarcation at the CP.
  • ADVA solution: Standard based Ethernet back-hauling Centralized management of services, customers, and equipment Supported topologies: tree and branch, point-to-point, ring Head-end: L3 (IP router), L2 (Ethernet switch) Protection: decoupling core/access – HSRP/VRRP (core), tandem node (access) Traffic management: classification, buffering, scheduling Scaling weaknesses of L2 switching are completely avoided. There is simply no need for MAC learning, simply no need for spanning tree algorithm. Isolate these functions in small domains where they add value i.e. in the service layer. The access layer contains MANY MORE network elements. Scale is fundamentally important here - simplicity pays! With the FSP 150 the network remains flexible for future growth. Make Ethernet a mass market access solution
  • Fully managed service over Metro Ethernet networks Intelligence in the core – simplified transport in the access Network based service model – rather than CPE based Decoupling the access from the core in terms of service definition and protection schemes Seamless interoperability with today’s installed base of layer 2/3 devices Clean customer demarcation with remote management and SLA monitoring
  • Current product solution: FSP 3000
  • Ethernet Services over Packet Aware Transport final.ppt

    1. 1. Ethernet Services over Packet Aware Transport
    2. 2. Benefits of Packet-Aware Transport <ul><li>History and Goals of Packet Aware Transport </li></ul><ul><li>Benefits of Packet Aware Transport </li></ul><ul><li>Evolution of SONET/SDH Equipment </li></ul><ul><li>Evolution of Ethernet Equipment </li></ul><ul><li>Service Interworking with MPLS </li></ul>
    3. 3. Ethernet Services over Packet Aware Transport <ul><li>History of Packet Aware Transport </li></ul><ul><ul><li>Late 1990s: Proprietary Ethernet over Sonet/SDH gear </li></ul></ul><ul><ul><li>2001-present: Standards-based “data-aware Sonet/SDH” solutions (GFP, VCAT, LCAS) </li></ul></ul><ul><ul><li>2002-present: Metro Ethernet solutions based on pure Ethernet, WDM & MPLS as pure-packet alternative to Sonet/SDH </li></ul></ul><ul><ul><li>2005: End-to-end architectures evolve beyond point solutions </li></ul></ul><ul><li>Goals for Packet Aware Transport </li></ul><ul><ul><li>Reduce capex for packet services transport </li></ul></ul><ul><ul><li>Support legacy traffic & services consistent with existing infrastructure </li></ul></ul><ul><ul><li>Reduce opex through functional integration of packet & transport </li></ul></ul><ul><ul><li>Increase service provisioning times </li></ul></ul><ul><ul><li>Improve bandwidth efficiency associated with multiple grades of packet services transport </li></ul></ul>
    4. 4. Benefits of Packet-Aware Transport Converge on Ethernet ports and service for many interfaces Aggregate traffic on handoff interfaces to reduce access charges Eliminate the need to crossconnect data services at multiple locations Enable handoff of all services on one universal port Provision services end-to-end using standards-based MPLS signaling Bridge converged core IP network & metro/access Sonet/SDH network Distinguish between high-priority and low-priority traffic within the Sonet/SDH Transparently multiplex different types of traffic onto a single Sonet/SDH pipe
    5. 5. Packet-Aware Transport Model SONET/SDH MPLS Core MPLS Common Core Optical Core Access Ethernet Packet ADM MSPP WDM / PON Metro Packet ADM Ethernet MSPP Router WDM Core Router SONET/SDH WDM Packet-Aware Transport Network Virtual Circuits OC-n Port OCn OCn OCn Ethernet ATM Frame Relay Customer CLE Universal Port
    6. 6. Benefits of Packet-Aware Transport <ul><li>History and Goals of Packet Aware Transport </li></ul><ul><li>Benefits of Packet Aware Transport </li></ul><ul><li>Evolution of SONET/SDH Equipment </li></ul><ul><li>Evolution of Ethernet Equipment </li></ul><ul><li>Service Interworking with MPLS </li></ul>
    7. 7. TDM Centric vs. Packet Centric Frame ATM IP Ethernet Frame ATM IP Ethernet Pseudo - wires Pseudo - wires Access Ring 3/1 DCS ADM IP Router ATM Switch Frame Switch Access Packet Ring Packet - aware MSP Service Edge <ul><li>Integrated architectures </li></ul><ul><li>Bandwidth-efficient </li></ul><ul><li>Hardware cost-effective </li></ul>- <ul><li>Feature-rich </li></ul>Evolution Evolution Frame ATM IP Ethernet Frame ATM IP Ethernet TDM - Encapsulated TDM - Encapsulated ADM PL Data Same: • Reliability • Security • Performance Same: • Reliability • Security • Performance Private Line Data 3/3 DCS 1/0 DCS
    8. 8. Enabling Technologies: Virtual Concatenation <ul><li>Radically improves data/Ethernet transport efficiency </li></ul><ul><li>More granular than typical Sonet concatenations with full legacy Sonet compatibility </li></ul><ul><li>Dynamically created N x STS1 or N x VT1.5 Sonet channels for Ethernet transport (N = 1, 2, 3…) </li></ul>OC192 STS3c 2xSTS1 VC 7xVT1.5 VC STS1 100-Mbit/s Ethernet 10-Mbit/s Ethernet
    9. 9. Enabling Technologies: Generic Framing Procedure (GFP) <ul><li>Carriers required new, more broadly applicable method of mapping new services to their transport networks </li></ul><ul><li>Packet-over-Sonet, native Ethernet, Fiber Channel, ESCON & Resilient Packet Ring (RPR) all map to SDH/Sonet equipment using GFP </li></ul>IP Data Services Storage Services GE, ESCON FC/FICON GE, Ethernet RPR ATM 10GE PDH DWDM WIS HDLC Virtual Concatenation Sonet / SDH OTN Future Services Lambda Services Frame GFP PPP (POS) Transparent GFP
    10. 10. Enabling Technologies: Resilient Packet Ring <ul><li>2-fiber ring topology; each station performs: add, drop, copy </li></ul><ul><li>Data rates of 155-Mbit/s to 10-Gbit/s & beyond </li></ul><ul><li>Packet-based traffic management for 3 classes of service </li></ul><ul><li>Sub-50ms protection for all services </li></ul><ul><li>Bandwidth efficiency </li></ul><ul><ul><li>Efficient statistical multiplexing </li></ul></ul><ul><ul><li>Spatial reuse </li></ul></ul><ul><ul><li>Protection per CIR, and not per channel </li></ul></ul><ul><li>Fairness (weighted) </li></ul><ul><li>Support for both Sonet & Ethernet PHY </li></ul>
    11. 11. SONET Evolves for Packet Efficiencies Sonet/SDH PHY Packet Fabric Service Aware ADM STS-1, VT1.5 Packet Services Time <ul><li>Add/drop circuits </li></ul><ul><li>No support for packet services </li></ul><ul><li>Distributed DXC </li></ul><ul><li>Mapping of packet services to circuits </li></ul><ul><li>Some local packet switching </li></ul><ul><li>Optimized for packet multiplexing </li></ul><ul><li>Mapping of circuits over packets </li></ul><ul><li>Traditional synchronization </li></ul>Circuits Packets Sonet/SDH PHY TDM Fabric Traditional ADM STS-1 VT1.5 Sonet/SDH PHY TDM Fabric Hybrid ADM STS-1 VT1.5 Packet Services
    12. 12. Benefits of Packet-Aware Transport <ul><li>History and Goals of Packet Aware Transport </li></ul><ul><li>Benefits of Packet Aware Transport </li></ul><ul><li>Evolution of SONET/SDH Equipment </li></ul><ul><li>Evolution of Ethernet Equipment </li></ul><ul><li>Service Interworking with MPLS </li></ul>
    13. 13. Managed Ethernet access Core POP Central Exchange Metro Network Local Exchange Access Network Customer Data services Dual-homing for higher availability Physical ring or pt-pt mesh options <ul><li>Positives </li></ul><ul><li>Very low CAPEX </li></ul><ul><ul><li>Inexpensive compact units </li></ul></ul><ul><ul><li>Efficiency through aggregation </li></ul></ul><ul><li>Very low OPEX </li></ul><ul><ul><li>Simple to deploy and operate </li></ul></ul><ul><ul><li>Full OAM </li></ul></ul><ul><ul><li>Connection oriented approach </li></ul></ul><ul><li>Carrier class </li></ul><ul><ul><li>Secure traffic separation </li></ul></ul><ul><ul><li>Scalable </li></ul></ul><ul><ul><li>Future proof </li></ul></ul>Ideal for profitable mainstream rollout
    14. 14. Carrier-class Ethernet mixed deployment Aggregation Demarcation x 10 P PE PE Aggregation 2 x 10 Aggregation & switching x 10 x 10 x 10 Aggregation Demarcation Metro c ore Metro access CP
    15. 15. Aggregation network putting it all together Integrated Ethernet access infrastructure for enterprise, business and retail market Aggregation and demarcation layer Metro PoP Service edge switch or router Protected Gigabit Ethernet ring Business / retail Enterprise / business 10 x 10/100 6 x 10/100/1000 FE FE GE GE Network services layer
    16. 16. Scalable Ethernet access solutions <ul><li>Secure connection oriented transport </li></ul><ul><li>Statistical multiplexing </li></ul><ul><li>Flexible bandwidth options from 1 to 1000Mbit/s </li></ul><ul><li>Most cost-effective solution for carrier mass rollout </li></ul>Metro Ethernet Ethernet Ethernet Customer premise FSP Management Suite Metro access Port aggregation Port extension Ethernet backhaul Metro core
    17. 17. Extending Ethernet Transport into core transport <ul><li>Rapidly scale and add new Ethernet services over existing fiber infrastructure </li></ul><ul><li>Extend distances up to hundreds of kilometers </li></ul><ul><li>Natural extension in to core/access transport </li></ul>Level Of Aggregation Logical connection FSP Management Suite Ethernet Ethernet
    18. 18. Benefits of Packet-Aware Transport <ul><li>History and Goals of Packet Aware Transport </li></ul><ul><li>Benefits of Packet Aware Transport </li></ul><ul><li>Evolution of SONET/SDH Equipment </li></ul><ul><li>Evolution of Ethernet Equipment </li></ul><ul><li>Service Interworking with MPLS </li></ul>
    19. 19. MPLS Evolves the Metro FSP 150CP FSP 150Mx FSP 150CP PoP#2 PoP#1 FSP 150CP x10 x10 FSP 150CP x10 x10 PoP#4 PoP#3 FSP 150Mx FSP 150Mx VLAN/MPLS/IP mapping in metro edge device The Internet Internet peering location Customer A logical path Customer B logical path Access infrastructure Metro core
    20. 20. MPLS Evolves the Metro and Core <ul><li>MPLS-enabled core network brings packet-awareness </li></ul><ul><li>Network services defined at the edge of the MPLS core network </li></ul><ul><ul><li>Enhanced Ethernet switching services </li></ul></ul><ul><ul><li>Other IP-enabled services, e.g., IP VPN, DIA, VOIP </li></ul></ul>Optical Core Transport IP Network MPLS Common Core Voice Network ATM/FR Network FR UNI Ports/IPFR T3FR IMA NxT1 FR NNI ATM UNI Ethernet DS1/DS3 OC-3/12/48 PPP/HDLC ATM IP Eth FR Optical Core Transport Evolution Service Edge