With any new network monitoring and management software, the first step is to assess your existing inventory. Do this by allowing the software to discover all your devices. Your new software may alert you to things you didn’t know you had. Network monitoring and management tooling may be smart enough to propose ways to improve your system: it might suggest new configurations or highlight bottlenecks. Your last step is to let the Simple Network Management Protocol (SNMP) traps flow and inform you about day-to-day network usage.
One blessing of the OSI model is that it has enabled innovation at the individual layers. These layers are abstracted from one another, which prevents accidentally injecting dependencies into other layers. The curse of the OSI model is that it has socially separated the people who work at the individual layers from one another—someone working at one layer may never think of someone else working at a different layer. It’s a recurring problem in network monitoring and management, in general.