Gartner Research

Bandwidth Doesn't Matter; Availability Drives Enterprise Network Costs

Published: 15 July 2013

ID: G00253068

Analyst(s): Neil Rickard , Danellie Young

Summary

In the developed world, the marginal cost of bandwidth is so low that rightsizing capacity has little impact on WAN cost. However, the cost of improving availability remains high and downtime is less acceptable, making rightsizing network availability the key goal for enterprise network designers.

Table Of Contents
  • Key Challenges

Introduction

Analysis

  • Enterprises Should Generously Dimension WAN Links in Developed Markets
    • Typical Marginal Bandwidth Costs
    • Ethernet Access Makes Overprovisioning of Bandwidth to Improve Agility Affordable
  • Enterprises Should Engage With Application Teams and/or the Business to Determine Availability Needs
    • Express Network Availability in Easy-to-Understand Terms
  • Enterprises Should Map Applications According to Their Availability Needs and Use This to Drive Network Design
    • Availability Needs Should Be Defined at Site and Application Levels
  • Enterprises Should Use Hybrid IP WANs to Rightsize WAN Availability and Control Cost
    • The Impact of Availability on WAN Costs
    • Hybrid IP WANs: The Flexible Solution to WAN Design

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