Multi-site hybrid networks across cloud environments

1. A method of deploying a network service across a plurality of data centers, said method comprising:

in response to a request for or relating to a network service, identifying virtual network functions associated with the network service and determining network connectivity requirements of the virtual network functions;

issuing commands to provision a first virtual link between at least two of the data centers in which the virtual network functions are to be deployed; and

issuing commands to provision a second virtual link to one of the data centers in which the virtual network functions are to be deployed, wherein

the data centers include a first data center having a first cloud management server running a cloud computing management software to provision virtual infrastructure resources of the first data center for a plurality of tenants of the first data center and a second data center having a second cloud management server running a cloud computing management software configured to provision virtual infrastructure resources of the second data center for a plurality of tenants of the second data center, and

the cloud computing management software running in the first cloud management server is different from the cloud computing management software running in the second cloud management server, and the commands issued to the data centers are each a generic command that is in a command format specified by neither the cloud computing management software running in the first cloud management server nor the cloud computing management software running in the second cloud management server.

2. The method of claim 1 , wherein the first virtual link is a multi-site virtual link that is provisioned across at least three data centers.

3. The method of claim 2 , wherein the first virtual link is a connection over a layer 2 extension network.

4. The method of claim 2 , wherein the first virtual link is a connection over an Ethernet virtual private network (EVPN).

5. The method of claim 1 , wherein the second virtual link is a connection over an overlay network provisioned within a single data center.

6. The method of claim 1 , wherein the virtual network functions associated with the network service are identified by parsing a descriptor of the network service.

7. The method of claim 6 , wherein the network connectivity requirements of the virtual network functions are determined by parsing the descriptor of the network service.

8. The method of claim 1 , wherein

the data centers include a first number of core data centers, a second number of regional data centers, and a third number of edge data centers, and

the first number is less than the second number and the third number is greater than the second number by at least one order of magnitude.

9. The method of claim 8 , wherein

the data centers each include hardware resources from which the virtual infrastructure resources are provisioned, and

the edge data centers include hardware resources installed at an edge data center location and mounted on a plurality of radio towers.

10. A computer system for deploying a network service across a plurality of data centers, said computer system comprising an orchestration server that is programmed to execute the steps of:

in response to a request for or relating to a network service, identifying virtual network functions associated with the network service and determining network connectivity requirements of the virtual network functions;

issuing commands to provision a first virtual link between at least two of the data centers in which the virtual network functions are to be deployed; and

issuing commands to provision a second virtual link to one of the data centers in which the virtual network functions are to be deployed, wherein

the data centers include a first data center having a first cloud management server running a cloud computing management software to provision virtual infrastructure resources of the first data center for a plurality of tenants of the first data center and a second data center having a second cloud management server running a cloud computing management software configured to provision virtual infrastructure resources of the second data center for a plurality of tenants of the second data center, and

the cloud computing management software running in the first cloud management server is different from the cloud computing management software running in the second cloud management server, and the commands issued to the data centers are each a generic command that is in a command format specified by neither the cloud computing management software running in the first cloud management server nor the cloud computing management software running in the second cloud management server.

11. The computer system of claim 10 , wherein the first virtual link is a multi-site virtual link that is provisioned across at least three data centers.

12. The computer system of claim 11 , wherein the first virtual link is a connection over a layer 2 extension network.

13. The computer system of claim 11 , wherein the first virtual link is a connection over an Ethernet virtual private network (EVPN).

14. The computer system of claim 10 , wherein the second virtual link is a connection over an overlay network provisioned within a single data center.

15. The computer system of claim 10 , wherein the virtual network functions associated with the network service are identified by parsing a descriptor of the network service.

16. The computer system of claim 15 , wherein the network connectivity requirements of the virtual network functions are determined by parsing the descriptor of the network service.

17. A non-transitory computer-readable medium comprising instruction executable in a computer system, wherein the instructions when executed in the computer system cause the computer system to carry out a method of deploying a network service across a plurality of data centers, said method comprising:

in response to a request for or relating to a network service, identifying virtual network functions associated with the network service and determining network connectivity requirements of the virtual network functions;

issuing commands to provision a first virtual link between at least two of the data centers in which the virtual network functions are to be deployed; and

issuing commands to provision a second virtual link to one of the data centers in which the virtual network functions are to be deployed, wherein

the data centers include a first data center having a first cloud management server running a cloud computing management software to provision virtual infrastructure resources of the first data center for a plurality of tenants of the first data center and a second data center having a second cloud management server running a cloud computing management software configured to provision virtual infrastructure resources of the second data center for a plurality of tenants of the second data center, and

the cloud computing management software running in the first cloud management server is different from the cloud computing management software running in the second cloud management server, and the commands issued to the data centers are each a generic command that is in a command format specified by neither the cloud computing management software running in the first cloud management server nor the cloud computing management software running in the second cloud management server.

18. The non-transitory computer-readable medium of claim 17 , wherein the first virtual link is a multi-site virtual link that is provisioned across at least three data centers, and the second virtual link is a connection over an overlay network provisioned within a single data center.

19. The non-transitory computer-readable medium of claim 18 , wherein the first virtual link is a connection over a layer 2 extension network.

20. The non-transitory computer-readable medium of claim 18 , wherein the first virtual link is a connection over an Ethernet virtual private network (EVPN).