Cloud, SDN and the Evolution of Enterprise Networks Neil Rickard © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. or its affiliates. This publication may not be reproduced or distributed in any form without Gartner's prior written permission. If you are authorized to access this publication, your use of it is subject to the Usage Guidelines for Gartner Services posted on gartner.com. The information contained in this publication has been obtained from sources believed to be reliable. Gartner di sclaims all warranties as to the accuracy, completeness or adequacy of such information and shall have no liability for errors, omissions or inadequacies in such information. This publication consists of the opinions of Gartner's research organization and should not be construed as statements of fact. The opinions expressed herein are subject to change without notice. Although Gartner research may include a discussion of related legal issues, Gartner does not provide legal advice or services and its research should not be construed or used as such. Gartner is a public company, and its shareholders may include firms and funds that have financial interests in entities covered in Gartner research. Gartner's Board of Directors may include senior managers of these firms or funds. Gartner research is produced independently by its research organization without input or influence from these firms, funds or their managers. For further information on the independence and integrity of Gartner research, see "Guiding Principles on Independence and Objectivity." Strategic Planning Assumptions • Through 2017, the average enterprise network will see a 28% CAGR for bandwidth due to the use of cloud computing, mobile devices and video. • Through 2015, at least 50% of cloud deployments will suffer from businessimpacting performance issues, requiring extensive network redesign to address them. © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Application Mapping — Key to Designing for Hybrid Cloud Environments Typical Practice Site Category Site Reliability Goal Technology A Data Center(s) 99.999% Dual Ethernet and/or MPLS Plus Internet VPN B HQ/Plant 99.99% Ethernet and/or MPLS Plus Internet VPN C Regional Office 99.9% MPLS Plus 3G/4G or DSL Backup D Small Office/Teleworker 99% Internet VPN Plus 3G/4G Backup Recommended Practice Application Performance Needs Reliability Goal Users Origin Telepresence Low Latency and Loss Application-level SLA 99.9% 4 x HQ Suites 3 x Partner Companies Peer to Peer ERP Application-level SLA Response Time 99.9% Sales and Order Entry, Large and Regional Offices Private Cloud VoIP Low Latency and Loss MOS Score SLA 99.9% All Peer to Peer Email Best Efforts 99% All Public Cloud • • • • The networking function must get buy-in from the business for these decisions. Achieving 99.999% availability can cost 100 times more than 99.0% availability. Hybrid networks can support different SLAs for different applications at the same location. SLAs will vary from network to application level for different applications. © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Hybrid Cloud Services Increase the Pace of Change in the Enterprise Network Public Cloud Provider Web Internet Private Cloud 3G/4G Cellular Email ERP DSL Web ERP Leased Line Branch Locations • • • • MPLS/Ethernet Network Email Virtual Private Cloud/Infrastructure Utility Provider Distant Cloud Centers — Higher Latency Internet Hosted Services — Variable Performance Chaotic Traffic Flows — Unpredictable Performance Cloud Providers That Will Not Allow Direct Connection to Their Centers —No End-to-end Visibility All Must Be Resolved With Little or No Notice © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Evolving the WAN to Support Cloud IT Delivery SaaS Provider Branch Locations Internet X Private Cloud MPLS IaaS Provider Front End — Cloud to User: • • • • Improve Internet Connectivity Revisit WAN Resilience Create Portable Suite of Virtual Network Appliances for IaaS Deploy Network-based WAN Optimization for SaaS Back End — Enterprise DC to Cloud: • High Capacity Low Latency Networks • Bandwidth on Demand (SDN?) • High Performance WAN Optimization Network Service Providers have been slow to respond to enterprises cloud networking needs — focusing on their own cloud offerings — forcing enterprises to assemble their own solutions © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. The Hybrid WAN needs Gateways (and NFV) • MPLS to Internet Gateways - For outbound internet – needs SWG - For inbound VPN tunnels - For remote access • Cloud/POP based WAN optimization • Possibly cloud/POP based: - Routers - Zoning firewalls - WLAN/NAC controllers - ADCs • Location, location, location - Services must be globally distributed, with VERY smart routing © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Cloud Delivery Will Require You to Make Greater Use of Standards Best Practices • Design and plan for networks with several zones. Logical Network Elements Storage Switching Core WAN Edge Routing Security Data Center WLAN Application Delivery © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. • Use standard protocols wherever possible, to enable agility. • Expect to revisit security process every 12 months. • Accept peering and integration as potential strategies. • External sourcing can be a way to force standardization! Virtual Network Appliances — Needed When Moving Applications to IaaS Internet or WAN WOC ADC Firewall Router Enterprise Data Centre © 2013 2014 Gartner, Inc. and/or its affiliates. All rights reserved. V-WOC V-ADC V-Firewall V-Router IaaS Provider Pre-configured appliance suite should be ready to deploy on demand: • Enterprises need to obtain access to an appropriate suite of virtual appliances • Existing appliance vendors should be preferred for consistency • Correct configurations need to be determined and tested The Application Delivery Network — Building the New Architectural Layer All Devices All Interactions All Apps - User to App - Browser (HTML) - App to App - Collaboration (SIP) - User to User - Thin Client (TS) - Virtual Desktop (HVD) - App to App (XML) Delivery Doesn'tApplication have to start with LB Layer It's about providing a broad set of services All Deployments All Users - Intranet - Employees - Internet - Customers - Business Partners © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. All Locations - Cloud - Hybrid The biggest benefit of virtualization and cloud computing: Increased data center agility. The biggest barrier to this agility: Network provisioning time © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. SDx the Nexus for Infrastructure? Consumption Virtualization & Cloud Infrastructure SDx = Software-defined anything (SDx) is a collective term that encapsulates the growing market momentum for improved standards for infrastructure programmability and data center interoperability driven by automation SDC - Compute Servers SDS Storage Network SDN Data Center Facilities Provision © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. SDDC SDI Data Infrastructure Center We need a new Data Center Network Architecture so we can.. • Significantly improve network operations agility. • Reduce the time required to provision network resources for a new VM from weeks to minutes. • Eliminating the “human middleware” • Bridge the gap between applications and the network • Have a multipath network topology to enable support for both north-south and east-west traffic © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. SDN Definition: A new approach to designing, building and operating networks • Control plane is decoupled from the data plane and is logically centralized. • Communication between network devices and the SDN controller use communication protocols that may be open or proprietary (southbound interface). • SDN controller supports an open interface to allow external programmability of the environment (northbound interface). Services Traditional SDN Controller Control Forward Control Forward © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Control Forward Forward Source: Ending the Confusion About Software-Defined Networking: A Taxonomy ID:G0024859 SDN Apps Forward Forward What is the value of SDN? • Agility: Allows for external control and automation of the network • Automated provisioning • Virtualization orchestration • Service Chaining • Management: Improves operational efficiencies • Cost: Promises ability to leverage low-cost hardware (i.e., "white-box" switches) • Decoupling network software and hardware can increase innovation in each layer • Enterprises, hosting companies and network service providers will each prioritize these benefits differently. © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. The SDN Stack — A New Network Model Policy Management and Enforcement Engine Compute (Phys or Virt) Application Delivery Net work Virtualization WAN Traffic Engineering Security (FW/IDS/IPS/WAF) Storage (Block/File/Object) Service Chaining (Constraint-based Paths) WAN Path Resiliency WAN Optimization Services Other Applications Applications APIs SDN Controller (Network Abstraction, Topology Database, Policy Mapping) Device Control Protocol Data Plane (Physical or Virtual Switches) © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. SDN Deployment Models 1 Device-based SDN deployment 3 2 Overlay-based SDN deployment © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Hybrid-based SDN deployment Where does the ADC Fit in? Integrating the Services Layer • Services layer includes L4-L7 Services such as ADC, Firewall, WOC, DLP, IDS/IPS etc. • Simplification of services provisioning (service chaining) • Evolution from course-grain implementation of services to more fine-grain • Examples and leading indicators - Per Application ADCs IDS FW - Security Architectures changing workloads © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. ADC Recommendations Map your applications, immediately Especially their availability and performance needs and where they will be hosted Develop a portfolio of techniques to optimize the performance of different types of cloud services synchronized with your enterprise's cloud adoption Software-based products for IaaS Solutions embedded in cloud services Proximity solutions where full access is not possible Explore the potential benefits and risks that SDN will bring to your organization. Beware of SDN-washing. Don't get hung up on architectural purity. Focus on achieving improved manageability and agility Look beyond the tactical to ensure solutions can evolve to meet the organizations longer term needs SDN has the potential to generate organizational disruption. Begin to © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. integrate server, network and storage teams Cloud, SDN and the Evolution of Enterprise Networks Neil Rickard © 2014 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. or its affiliates. This publication may not be reproduced or distributed in any form without Gartner's prior written permission. If you are authorized to access this publication, your use of it is subject to the Usage Guidelines for Gartner Services posted on gartner.com. The information contained in this publication has been obtained from sources believed to be reliable. Gartner di sclaims all warranties as to the accuracy, completeness or adequacy of such information and shall have no liability for errors, omissions or inadequacies in such information. This publication consists of the opinions of Gartner's research organization and should not be construed as statements of fact. The opinions expressed herein are subject to change without notice. Although Gartner research may include a discussion of related legal issues, Gartner does not provide legal advice or services and its research should not be construed or used as such. Gartner is a public company, and its shareholders may include firms and funds that have financial interests in entities covered in Gartner research. Gartner's Board of Directors may include senior managers of these firms or funds. Gartner research is produced independently by its research organization without input or influence from these firms, funds or their managers. For further information on the independence and integrity of Gartner research, see "Guiding Principles on Independence and Objectivity."
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