Multi-subnet participation for network gateway in a cloud environment

A non-transitory computer-readable medium that stores instructions executable by a computer, wherein the instructions, when executed, cause the computer to perform a method of allocating network addresses by a network management server to a network gateway connected to a public network, the method comprising:

• receiving an allocation request that specifies a number of network addresses to allocate to the network gateway;
• determining first and second subnets of the public network having, respectively, first and second pools of available network addresses capable of being allocated to devices on the public network;
• allocating one or more available network addresses from the first and second pools to the network gateway;
• and
• associating a first indicator with a first one of the available network addresses in the first pool, the first indicator indicating that the associated network address represents participation of the network gateway in the first subnet.

A method of deallocating network addresses by a network management server from a network gateway connected to a public network, the method comprising:

• receiving a deallocation request that specifies a number of network addresses to deallocate from the network gateway;
• determining a first subnet of the public network having a first set of one or more network addresses which have been allocated to the network gateway, wherein a first network address of the first set of one or more network addresses is associated with an indicator that indicates participation of the network gateway in the first subnet;
• and
• deallocating one or more of the first set of network addresses from the network gateway and returning the deallocated network addresses to a first address pool associated with the first subnet.