A new era of campus network design


Applications have become a key driver of revenue, rather than their previous role as merely a tool to support the business process. What acts as the heart for all applications is the network providing the connection points. Due to the new, critical importance of the application layer, IT professionals are looking for ways to improve the architecture of their network.

A new era of campus network design is required, one that enforces policy-based automation from the edge of the network to public and private clouds using an intent-based paradigm.

SD-Access is an example of an intent-based network within the campus. It is broken down into three major elements:

  1. Control-Plane based on Locator/ID separation protocol (LISP),
  2. Data-Plane based on Virtual Extensible LAN (VXLAN) and
  3. Policy-Plane based on Cisco TrustSec.

Intent-based networking is all about informing the controller about the end goal and allowing the controller-based network to figure out the low-level device and configuration details. This is similar to how the general packet radio service (GPRS) works. The user inputs a destination and the software calculates the best route, taking into consideration the parameters abstracted from the user.

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