Before we can set up the security policies in the next chapter, we need to upgrade our environment. The reason for this is that the 19.2 and 19.3 images do not support some of the features we need, but version 20.1 does.
Managing Software Images
The vManage NMS handles the software distribution and upgrades for all of our SD-WAN devices throughout the network; it is our software repository. In this chapter, we are going to upgrade all of our devices. There are a couple of best practices that we should follow when performing upgrades:
Use vManage to perform upgrades, rather than the CLI.
The network ...
