Cisco IP Solution Center 4 0 TRAFFIC ENGINEERING

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Agenda • • • Introduction – Intelligent Information Network Traffic Engineering Management ISC 4. 0 TEM Feature Overview Bandwidth Protection Primary Tunnel management • Presentation_ID Summary Value Propositions © 2004 Cisco Systems, Inc. All rights reserved. 2

The Intelligent Information Network Individual Products Technology Solutions Integrated Systems Business Solutions Intelligent Information Network (IIN) Cisco’s 3 -5 year vision for the evolution of networking from connectivity to intelligent systems • Goals: • Accelerate integration of innovation into the network • Embed intelligence to create a unified networking system Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 3

Intelligent Network Benefits • Secure infrastructure • Self-defending network mitigates threats, both known and unknown • Faster deployment of service and applications • Integrated, modular systems and management reduce custom integration • Granular policy controls couple network with business processes and services • Reduced complexity and lower TCO • New capabilities and technologies are simpler to integrate • Integrated systems and management reduce Op. Ex and systems integration Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 4

IP Traffic Engineering in IIN Availability/ Resiliency Delivery Optimization Enhanced Manageability Presentation_ID Guarantees bandwidth and fast restoration under failure conditions. Optimizes MPLS core management. Guarantees delivery of Service Level Agreement traffic and bandwidth protection. IP Solution Center Traffic Engineering Management a centralized planning and provisioning tool which leverages IOS MPLS Traffic Engineering. © 2004 Cisco Systems, Inc. All rights reserved. 5

Key Benefits of Traffic Engineering (TE) • Delivers the service characteristics of circuitswitched networks -- over packet-based networks i. e. Converged Networking • Provides fast bandwidth restoration -- not just connectivity restoration • Problems solved Under/Over-utilized backbones (lack of traffic optimization tools), Where and when to upgrade core networks Unnecessary network upgrade costs. Inability to deliver SLA guarantees for the services Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 7

Network Convergence • Different types of traffic have been carried over different types of networks with different performance characteristics Delay/jitter sensitive traffic (voice, video, etc) over TDM/ATM Internet and VPN Data over Packet Switched Networks (IP) • The goal for network operators is to have a single network delivering both types of traffic Offering traditional ATM/FR/TDM services over IP at lower cost Opening new services to IP Service Providers, including voice, video distribution (studio-to-studio) and videoconferencing Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 8

MPLS Traffic Engineering is the Key Technology… • … for delivering ATM, Frame Relay and similar services over converged IP networks • … for fast restoration and bandwidth protection • … for Voice over IP • It enables: Predictable network performance Matching of traffic flows to Qo. S resources Fast restoration in the event of element failure Delivery of hard bandwidth guarantees Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 9

…but MPLS-TE needs management tools • MPLS-TE offers a way of routing traffic according to a set of requirements or constraints ISC: TEM calculates tunnels within constraints including bandwidth, DS-TE pool, affinity, delay and protection level • Once a path is found to meet these constraints it is signalled using RSVP-TE ISC: TEM automatically audits and configures the tunnels on the network (as control plane reservations) • MPLS-TE tunnels can be used to carry primary traffic demands, or for back-up (bandwidth protection) Tunnels can be managed, optimized and deployed using ISC: TEM Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 10

IP Solution Center: Traffic Engineering Management (ISC: TEM) • ISC: TEM offers an easy-to-use management interface TE topology display • Fast Re-Route and Primary Tunnel management Carrier-class tunnel provisioning • Leverages Cisco IOS features DS-TE (Bandwidth Pools), Fast Re-Route (Bypass Tunnels with Load balancing) • World-class optimization algorithms (Cisco bought the company that developed them) • ISC: TEM is the only integrated MPLS-TE management solution available today Provides planning and visualization support AND automatic TE tunnel provisioning Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 12

ISC 4. 0 TEM - Key Operational Features • Discovery and Audit TE enabled devices and tunnels Visualization and tunnel audit • Bandwidth Protection during element failure FRR tunnel audit and calculation • Primary tunnel placement & repair • Global optimization of network utilization • Deployment and tunnel activation Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 14

What is Bandwidth Protection? • ATo. M requires service guarantees Failures in single network elements should not cause high value services to fall below specified requirements Bandwidth Delay • A new solution to an old problem Using MPLS features and ISC: TEM we have a new costeffective method to provide a solution Alternative to SONET/SDH APS Guaranteed bandwidth Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 16

Guaranteed Bandwidth • Contracted bandwidth must be available even during network failure Delay, jitter and restoration time may need to be guaranteed • MPLS Fast Reroute (FRR) has been coupled with overprovisioned networks to attempt to replicate these guarantees This delivers connectivity, but is bandwidth inefficient, and does not offer “hard” bandwidth guarantees • Cisco MPLS Bandwidth Protection using ISC: TEM offers SONET-like protection through optimum computation and provisioning of FRR Results show that the utilization can be significantly improved while still guaranteeing bandwidth in failure conditions In normal conditions bandwidth is available for “best efforts” traffic Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 17

Independent Failure Assumption • Bandwidth is guaranteed against any single element failure Link, node or SRLG • Assumes that the failure is temporary Primary paths will be restored within seconds/minutes For long-term outages network will be re-optimised • Independent Failure Assumption allows for efficient use of backup bandwidth Bandwidth required for one failure can be reused for another failure Requires that bandwidth is accounted for off-line Backup tunnels are signalled with zero bandwidth, so bandwidth can be reused. Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 18

Ro. I Case Study: Node Protection Nodes Protected – ISC-TEM vs. CSPF % Nodes Protected 100% 90% 80% 70% 60% ISC-TEM 50% CSPF-Based 40% 30% 20% 10% 0% 22 38 54 118 236 Five SP Networks: Number of Nodes ISC-TEM protects more nodes in every network studied, (and is also more efficient in link protection – not shown) Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 19

ISC: TEM Primary Tunnel Management • Key features: Tunnel placement with user-specified constraints Constraints supported in IOS (bandwith pool, affinity) Delay Protection level (none, best-effort, Links/SRLGs, or Nodes/Links/SRLGs) Add/modify tunnel requirements, create new tunnels with minimum disruption of existing tunnels Network grooming – re-optimize the tunnel layout globally • Key benefits: Accommodate more traffic onto a given network Delay network upgrades Traffic management and control Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 21

Network Grooming • Global re-optimization of primary tunnel placements to improve network utilization Minimize worst case link utilization Minimize TE metric cost • All constraints must be satisfied Constraints supported in IOS (BW pool, affinity) Delay Protection level (none, best-effort, Links&SRLGs, or Nodes&Links&SRLGs) Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 22

Network Grooming: Ro. I Case Study • ISC-TEM was used to optimize the placement of real traffic demands on the actual networks of several major carriers. • Case Study details (see next slide): International tier 1 network (175 nodes, 380 links) Increase demand by 10% increments to 200% Link upgrade policy: double b/w when 70% utilized • Fewer link upgrades are needed when placing increasing traffic demands, compared with IGP routing or with conventional traffic engineering • Delay or reduce bandwidth upgrade costs by 60% - 90% Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 23

Results: Link Upgrades for Demand Growth Bandwidth Upgrade Requirements (Gb/s) 700 70 600 B/W Upgrades (Gbps) #Link Upgrades Required Link Upgrade Requirements (# of links) 80 60 50 40 30 20 500 400 300 200 10 0 0 0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200% 0% Demand Matrix Growth ISC: TEM Required Network Upgrades for each algorithm: ISC: TEM 100% Demand Growth # of Links 40% 60% 80% 100% 120% 140% 160% 180% 200% Demand Matrix Growth CSPF Offline Default Metrics CSPF Offline Customer Metrics 20% B/W Gbps ISC: TEM CSPF Offline Customer Metrics CSPF Offline Default Metrics 200% Demand Growth # of Links B/W Gbps 1 2 12 75 CSPF Offline, Customer Metrics 7 55 32 219 CSPF Offline, Default Metrics 16 134 70 586 Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 24

Why bother with Traffic Engineering? TE enables Service Providers to: • Speed up time to market for new services on converged networks • Reduce investment in over-provisioning • Increase throughput and utilization of existing network • Guarantee bandwidth and fast restoration under failure conditions • Postpone Capex Presentation_ID © 2004 Cisco Systems, Inc. All rights reserved. 26

ISC: TEM Summary • ISC: TEM leverages MPLS TE to enable network convergence Predictability in normal and failure conditions Traffic flows matched to Qo. S resources Guaranteed bandwidth with fast restoration • ISC: TEM offers advanced MPLS-TE management functionality, including network optimization and bandwidth protection Advanced algorithms used in ISC: TEM outperform the alternative options and enable: Efficient and Qo. S-aware utilization of network infrastructure to support premium SLAs Deferment of expensive link upgrades as traffic grows Presentation_ID Bandwidth guarantees during failure without the expense of SONET protection 27 © 2004 Cisco Systems, Inc. All rights reserved.