IP Address Management (IPAM)
Subnets are IP address areas that contain IP addresses. Subnets are normally specified based on the relevant subnet mask, which is a technically configured value on a network device that identifies the subnet. A subnet can then be divided into further areas, for example into sections for a specific customer or application scenarios within a subnet.
Subnet: A subnet can look as follows:
|172.22.0.0/16||172.22.0.1 - 172.22.255.255||Location: Gersthofen, internal LAN|
Range: Although the technical subnet is predetermined, a subnet can then also be subdivided into further sections.
Possible examples for this scenario might be: Individual sections for departments, firewall rules, device types, and/or application areas:
|172.22.0.0/24||172.22.0.1 - 172.22.0.254||Routers/Switches|
|172.22.1.0/24||172.22.1.1 – 172.22.1.254||Servers|
|172.22.2.0/24||172.22.2.1 – 172.22.2.254||Printers|
IP Address: Once a range has been selected the corresponding IP addresses will be listed. This will identify which IP addresses have been issued and which are still available, where necessary with their hostname.
It is also important to realize that not all subnets have to be – or indeed can be - divided into further sections. For example, you might have a transfer network which only consists of two possible IP addresses. For this reason, the setup described above only serves as an aide to understanding ERAMON’s IPAM.