Cisco Cisco Identity Services Engine 2.0 Libro blanco
© 2015 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public.
Page 3 of 13
Figure 1. ISE Capabilities Bundling Strategy
We use a well-defined solution delivery methodology or project lifecycle (PLC) framework that aligns to our PLC.
The PLC defines several stages in the delivery of a solution or IT capability, with approval gates and specific
deliverables at each stage. All projects follow several phases:
●
Business Commit, where the business case and benefits are clearly articulated
●
Concept Commit, where the solution architecture is the primary outcome
●
Execute Commit, where detailed design work and planning starts
Architecture, Design, and Operational Readiness Reviews occur throughout the process, ensuring that no solution
is implemented without the appropriate resources, support, and communications plans in place.
Careful project management, along with governance from the Service Management Office and the Project
Management Office, and regular syncing with the project stakeholders ensure that projects stay on time and on
budget. Deviations are quickly identified, and appropriate remediation or business decisions are made expediently
to get back on track.
Ultimately, the business driver for deploying ISE is our strategy of embedding security within the network fabric.
Relying on outdated, hardened, perimeter-based models does not provide the security essential in a borderless
enterprise, or in an environment where trends such as BYOD and the Internet of Everything (IoE) result in many
more devices that require secure connectivity.
Our global ISE deployment also delivers operational and architectural simplicity, which, in turn, drives real cost
savings. Previously, we had to maintain 12 servers globally with long access control lists (ACLs) to provide guest
access. With the deployment of ISE Guest, we have reduced our footprint to two VMs globally and an ACL of fewer
than 20 lines. Deriving the exact cost savings depends on the total cost of ownership (TCO) calculator. We have
seen actual TCO reductions in operational, infrastructure, and upgrade costs for our guest access service alone.