In a scalable or high-availability environment, an engineer needs to ensure there is a near zero possibility of human error. For a service based organization, even a small downtime can cost millions of dollars in revenue or even deterioration of a brand's image. There are high chances of outages while performing certain tasks, either due to manual executions or to certain hardware failures.
A solution to this typical real-life problem is to quickly identify the problem and perform self-remediation. Let's convert this problem into a particular use case.
In this use case, we need to ensure that all of the routers in our environment always have the Loopback45 interface up and running. This could be a critical interface, where accidentally shutting off this interface might stop traffic flow to a router or a router may stop responding...