IP ranges
2 minute read
An IP range is an alternative to static addressing, DHCP, or asking the requester to supply an address. CMP tracks which addresses in the range are free, and which are in use, so each is issued only once. The range is held in an adjustable resource pool.
A network with an IP range overrides a configured addressing scheme.
Add an IP range
- Go to Admin > Networks and select the network’s name.
- Select the IP Pool tab and select Add Range of IPs.
- Enter a Starting IP and an Ending IP. CMP adds the starting IP and every address after it up to the ending IP, except addresses ending in
.0,.1, or.255. Add those from the pool’s Values tab if you need them. - Select Add.
When the network records a gateway and a netmask, CMP fills both fields with the first and last usable addresses, omitting the network, gateway, and broadcast addresses. Accept those or narrow them.
A range may span more than the final octet, but CMP stores one entry per address, so a range covering several octets creates a correspondingly large pool.
A network holds one IP range. Add Range of IPs appears only while the network has no pool; afterward, the IP Pool tab links to the resource pool.
Change or delete a range
Once the pool exists, manage it from the resource pool: on the network’s IP Pool tab, follow the link to the pool.
- To change which addresses are available, select the Values tab, where you can add, edit, and remove individual ones. Removing an address is how you apply exceptions. If an address in the range belongs to an appliance, remove it from the pool.
- To delete the range, select Delete on the pool’s Overview tab. The network’s IP Pool tab then offers Add Range of IPs again, so this is also how you replace one range with another.
Related
- Resource pools: The object an IP range is stored in, and where to edit its values.
- Import and manage existing networks: Where networks and addressing come from.
- IP address management (IPAM): Hand address assignment to an external IPAM instead.