With an IPv4 block created in Address Manager, you can resize an IPv4 network.
Note: In order to support two
allocatable IP addresses, /31 networks are special cases that do
not have network, gateway, or broadcast addresses. Resizing or
splitting larger networks to /31 will remove associated network,
gateway, and broadcast addresses.
Note: Resize and merge operations
cannot be performed on a /31 network if a DHCP range is present
on the network.
Note: Resizing networks to and from /32
is not supported.
To resize an IPv4 network: