Subnet management in OpenStack

A subnet in Neutron is a Layer 3 object and can be an IPv4 or IPv6 address block defined using classless inter-domain routing (CIDR) notation. CIDR is a method of allocating IP addresses using variable-length subnet masking, or VLSM. Subnets have a direct relationship to networks and cannot exist without them.

Note

More information on CIDR and VLSM can be found on Wikipedia at http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing.

The primary commands associated with subnet management that will be discussed in this chapter are listed in the following table:

Subnet Commands	Description
subnet create	Creates a subnet
subnet delete	Deletes a subnet(s)
subnet show	Displays subnet details
subnet list	Lists subnets
subnet set	Sets subnet properties
subnet unset	Unsets subnet properties
subnet pool create	Creates a subnet pool
subnet pool delete	Deletes a subnet pool(s)
subnet pool list	Lists subnet pools
subnet pool set	Sets subnet pool properties
subnet pool show	Displays subnet pool...