The first of our three layers is
“the foundation layer”. This layer of monitoring forms the basis of the
advanced monitoring done later on. Here you monitor your physical or virtual
devices, called Hosts – such as a
Windows server, Linux server, Cisco router, Nokia firewall, VMware virtual
machine, etc and these are often the lowest level of the ‘stack’. You
ensure they are up by pinging them, and so on.
configured, this provides you with a view such as the image shown above, where the hosts
you have added and their state is shown, such as which ones are UP or DOWN – allowing you to see if a device
has crashed, been powered off erroneously, and so on.