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IP Backbone requirements for NGN VoIP

IP Backbone requirements for NGN VoIP. Michael DICKMANN. Agenda. Pourquoi converger?. NGN, VoIP: le point de vue de Siemens. VoIP: IP Network design principles. VoIP: Selection of IP Network elements. VoIP: Quality of service requirements. Backbone Solutions.

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IP Backbone requirements for NGN VoIP

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  1. IP Backbone requirements for NGN VoIP Michael DICKMANN

  2. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  3. Why Next Generation Networks? Needs of customers: Revenue generating Applications Additional revenues Services Integration Optimized utilization Self-managing Networks Efficiency of infrastructure Demand-oriented Infrastructure & Technology

  4. Features SURPASS-enhanced NGN NGN IP-Technology TDM- Technology Time Challenges and OpportunitiesA simple TDM-NGN comparison TDM- Technology NGN IP-Technology Costs/connection Comparable costs Time Take advantage of the “Economies of scale” and the service richness of Next Generation Network

  5. Augmentation de la bande passante - effet sur le Core IP - Internet Delta Voix Voix Effet de la croissance du traffic voix (Virtual Trunking) sur le Core IP: néantbande passante pour la voix << bande passante de l’Internet

  6. Open platforms Open interfaces between all components Softswitch provides Trunk- and Local-Switch features Gateways support various media stream conversions Call Processor, SS7 Processor Maintenance & Administration SS7 Switching matrix Trunk I/F Line Card Trunk I/F Line Card SS7 Signalling Gateway Softswitch Subscriber Gateway Trunk Gateway IP/ATM Network Subscriber Gateway Trunk Gateway Challenges and OpportunitiesAdvantages of a new architectural paradigm PSTN Switch • Integrated functionality • Proprietary platforms and partly proprietary feature development • Standard IN interface for externally-provided services Distributed MSF* Architecture *MSF=Multiservice Switching Forum; defined a widely accepted architectural model for carrier convergence

  7. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  8. PSTN PLMN NGN IN IP Phone IP PBX IAD & CPG SCP SCP Switch Voice over Broadband any service over your broadband subscriber line Switch Switch MSC MSC Switch Switch SURPASS SURPASS Solution overview Siemens Farbpalette Virtual Trunkingthe packet based core for fixed and mobile networks PBX Phone Packet Local Switch LEX consolidation, replacement, user growth SIP, multimedia Applications Signaling Overlay Network the universalsignaling bridge for all networks NextGen Applications SIP-based multimedia, .....across any networkwe SURPASS

  9. SCP H.323/SIP SURPASS Virtual TrunkingSeamless integration into any network environment hiQ Softswitch NetManager INAP SIP-T/BICC* over IP SS7 over IP SS7 SS7 hiS 700 STP STP SS7 SS7 MGCP PSTN / ISDN MGCP/MEGACO PSTN / ISDN MGCP/MEGACO H.323 SS7 hiR bearer bearer bearer hiG hiG Mobile Networks IP Core Network Fits seamlessly into any network environment supporting full PSTN, ISDN feature set !

  10. RDLU DLU The Solution for all Voice Services – All services over IP SURPASS Packet Local Switch Full TDM access to the NGN SURPASS hiS Signaling Gateway PSTN Network SURPASS hiQ Softswitch SS7 Management SystemNetManager POTS, ISDN-BRI MGCP/ACP MGCP MGCP bearer PBX ISDN-PRI SURPASS hiG Trunk Gateway SURPASS hiR Resource Server V.93 V.93 SURPASS hiX Access Gateway Any-vendoraccess equipment V5.x,TR-08,GR-303 QoS enabled IP Core Network

  11. PSTN / ISDN SURPASS Voice over BroadbandProvide full featured PC telephony SS7 QoS IP backbone SIP SIP clients and terminals, e.g. Microsoft Windows Messenger IP-IP GW H.323+ H.323/SIP IP PBX’s, e.g. IP clients and terminals IP Clients - the future of communications today!

  12. SIP Switch SURPASS NextGen Applications (NGA)multimedia across any NGN Siemens Farbpalette Easy to developend-user applications Presence Conferencing Messaging … CORBA SIP SURPASS - open Application Interfaces SURPASS network SIPdomain Open Interfaces for easy application development

  13. SCP Switch MSC PSTN PLMN IN NGN SURPASS Signaling Overlay NetworkBridging all networks Bridging all networks • All network types • Fixed Networks (PSTN) • Mobile Networks (PLMN) • Next Generation Networks (NGN) • All network technologies • TDM • (ATM) • IP Full signaling interoperability between today´s and future networks

  14. SURPASS - Streamline your NGN business with NetManager NetManager for SURPASS NGN Management Architecture Cross Domain Management & Customer Care Open Interfaces • guarantees cost saving and revenue generation • centralized management of all SURPASS solutions and products • fast service introduction • automation of operational processes with value added applications • open interfaces for easy integration into Cross Domain Management solutions Service Management Applications Network Management Applications Base System NetManager SURPASS

  15. PSTN PLMN NGN IN Virtual Trunkingthe packet based core for fixed and mobile networks IP Phone PBX Phone IP PBX IAD & CPG SCP SCP Switch Packet Local Switch LEX consolidation, replacement, user growth Voice over Broadband any service over your broadband subscriber line Switch Switch MSC MSC Switch Switch SURPASS SIP, multimedia Applications Signaling Overlay Network the universalsignaling bridge for all networks NextGen Applications SIP-based multimedia, .....across any networkwe SURPASS SURPASS Solution overview Siemens Farbpalette

  16. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  17. IP Network Design – a Huge Area • Lot of things to keep track of in next generation networks • Topology / IP addressing • Router requirements • IGP • BGP • Utilization • Blocking • Bandwidth • MPLS

  18. Hierarchical Design Principles:Dual-homing to the core with access redundancy Core Distribution Access Core Layer: Switching speed Distribution Layer: Topology change isolation Controlling the routing table size Traffic aggregation Access Layer: Feed traffic into the network Control access

  19. Strategy for successful IP addressing • Allocate IP addresses carefully. • If you don’t address your network right, you have no hope of scaling to truly large sizes. • Keep two primary goals in mind: • Controlling thesize of the routing table • Controlling the distance topology change information must travel (by controlling the work required when topology changes) • The primary tool for accomplishing these goals is summarization.

  20. OSPF AREA 0.0.0.0 L1-L2 L1-L2 POP 1 L1-Only Area 49.0001 POP 2 L1-Only Area 49.0002 T640 ERX 1 ... 6 AREA 0.0.0.X L1-L2 L1-L2 T640 Core L2-Only Area 49.0000 1 ... 10 1 ... 10 132.0.1/24 L1-L2 L1-L2 T640 132.0.0/18 132.0.0/20 132.0.0/24 1 ... 10 1 ... 10 POP 1 L1-Only Area 49.0003 POP 2 L1-Only Area 49.0002 ERX L1-L2 L1-L2 132.0/16 Towards Public Internet Selecting the Appropriate IGP: OSPF or IS-IS • Both protocols are over 15 years old, using graph theory that’s at least 40 years old • Both protocols are (even still) works in progress • They’re both good protocols • Use the one that makes the most sense to you We probably choose IS-IS OSPF IS-IS

  21. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  22. Core Layer Requirements • Proven stable IS-IS, OSPF and BGP4 • Full-featured MPLS for traffic engineering and multi-service applications • Deterministic line-rate forwarding performance under network instability • Low and predictable latency • Per-flow load balancing • Broad range of interfaces, scalable to STM-16 / STM-64 speeds • High port density and flexible configuration • System reliability Core Layer Core

  23. Distribution Layer Requirements • Proven stable IS-IS, OSPF and BGP4 • Full-featured MPLS for traffic engineering and multi-service applications • Deterministic line-rate forwarding performance under network instability • Low and predictable latency • Per flow load balancing • Broad range of interfaces, scalable to STM-16 / STM-64 speeds • High port density and flexible configuration • System reliability • Dual router APS (Automatic Protection Switching) Core Layer Distribution Layer Distribution

  24. PEERING Internet Exchange Core Layer Distribution Layer Peering Requirements • Full-featured MPLS for traffic engineering • Scalable and robust BGP-4 routing protocol • Complete user-friendly routing policy implementation to simplify management • Broad range of interfaces, scalable to STM-16 / STM-64 speeds • Consistent line-rate forwarding performance under network instability • Small form factor for space-limited deployment • Low power consumption • Sampling and port mirroring for traffic visibility • Per-flow load balancing • Rate limiting for peering connections • Per flow policing • Traffic classification / DSCP re-writing • Destination address verification • Destination Class Usage (DCU) Peering

  25. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  26. Impact of Router Performance on Per-Hop Latency • Route lookups • Policies and classification functions • Ingress and Egress queue management • Switch fabric access and SAR functions • MPLS and other encapsulations • VPN management • Background processes on shared CPU‘s (SNMP, statistics, etc.) Statements in red are typically performed on both core and edge routers Edge routers: VPN management, classifications, support a multitude of customer terminations, and tunnel encapsulations Core routers: Basic packet forwarding as fast as possible

  27. Internet Processor II • Packet Filtering • Blocking • Counting • Logging • Explicit Forwarding • CoS Classification • Granular Policing • Packet Sampling • Deterministic Load Balancing 120.0% 100.0% 80.0% % of Line Rate 60.0% 40.0% 20.0% 0.0% Increasing Number of Packet Filters Juniper CPU Based Router

  28. Edge Routing Solutions • The edge is where services are defined, created and controlled • The edge is where the change in networks will occur • Network edge as the first strategic investment • Services create revenue directly • Core investments are in advance of revenue • Even in slower periods, customers and network applications all depend on and demand new or faster services • Everything on IP

  29. Extended bursts of 1500-byte packets entering the router via an STM-4 connection fill E1 connection leading to immense per-packet latency and possibly packet loss Edge router requirement: Congestion control functions Support of specific traffic classes Support of multiple queues per interface Low-Speed Connections: The Interface Bottleneck

  30. Quality of Service – Access vs. Core • At the edge, the access (subscriber) facing side of the edge router has different QoS requirements than the core facing side • Access: • Great number of IP interfaces (subscribers) • 4 – 8 queues per subscriber (IP interface) that represent the traffic classes • 10s of 000s of queues per port • Core: • Low number of IP interfaces (uplink) • 4 – 8 queues per port that represent the traffic classes • All access traffic (and queues) is aggregated into the corresponding core queues (uplink)

  31. Customer Class-Based Queuing • Each customer is serviced by 4-8 unique hierarchical queues • Strict priority and hierarchical round robin • Supports QoS SLA per customer Hierarchical Weighted Queues C-OC-12/STM-4 F-E1 DS-3 DS1

  32. Juniper Networks Next-Generation IP Edge Router ERX • High Density (low power, small size) to conserve scarce point-of-presence (POP) rack space • Hundreds of physical circuits/shelf • Thousands of logical circuits/shelf • High bandwidth capacity with 100% Wire Speed Performance • Hardware redundancy and other Carrier reliability features provide high availability required to meet SLAs • Supports wire speed QoS crucial to deployment of the business-grade Internet

  33. Port-Based Queuing • Each physical port is serviced by 4-8 queues • All customer traffic terminating on the same physical port is aggregated into a common scheduler • Delivers Class-Based Queuing services • No deterministic subscriber traffic / no QoS SLA C-OC-12/STM-4 Class-Based Queues F-E1 DS-3 DS1

  34. Agenda Pourquoi converger? NGN, VoIP: le point de vue de Siemens VoIP: IP Network design principles VoIP: Selection of IP Network elements VoIP: Quality of service requirements Backbone Solutions

  35. Juniper Networks Next-Generation IP Edge Router ERX • High Density (low power, small size) to conserve scarce point-of-presence (POP) rack space • Hundreds of physical circuits/shelf • Thousands of logical circuits/shelf • High bandwidth capacity with 100% Wire Speed Performance • Hardware redundancy and other Carrier reliability features provide high availability required to meet SLAs • Supports wire speed QoS crucial to deployment of the business-grade Internet

  36. T-series M-series E-series Juniper Networks’ Carrier Class Routers:M-series and T-series Value Added • Best-in-class IP routing platforms • Predictable performance • Carrier-class availability • Unparalleled flexibility and control • Purpose-built modular operating systems • Rich packet processing feature set • Hardware only forwarding path • Low latency, jitter • Wide range of interfaces • Interface portability • Services Without Compromise • Flexible Class of Service (CoS) capability • Classification, queuing, marking • Security • Rate limiting, filtering, sampling,counting, logging, IPSec, others

  37. T-series M-series Comprehensive Solutions Platform Capacity Deployment Scenario: 640 320 160 40 20 10 5 Core Transport Edge Services ERX Family Metro Ethernet Edge Routing Subscriber Services

  38. Thank you for your attention Michael DICKMANNICN CN4 H+49-89-722-47151michael.dickmann@siemens.com

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