Address management in an overlay network environment
View Patent ↗Embodiments of the invention relate to overlay network address management. One embodiment includes an overlay gateway including an overlay network manager associated with a physical network. The overlay network manager prevents duplicate address assignment for overlay domains having a first sharing status and performs address translation for overlay domains having a second sharing status. Address translation is avoided for overlay domains having the first sharing status.
1. A system comprising a computer processor, a computer-readable hardware storage medium, and program code embodied with the computer-readable hardware storage medium for execution by the computer processor to implement a method comprising:
receiving an assignment of an address in an address space from a tenant on at least one overlay domain overlaying a physical network, wherein each of the at least one overlay domain shares the address space with the physical network, and a virtual machine of the at least one overlay domain communicates with the physical network without requiring address translation;
determining whether the assignment of the address results in a conflict of addresses amongst the at least one overlay domain by detecting whether there is a conflict of addresses within a cluster with a minimal number of hops within the cluster, wherein a location within the address space resulting in a conflict of addresses within the cluster is detected in at most two hops within the cluster; and
denying the assignment of the address in response to determining the assignment of the address results in a conflict of addresses amongst the at least one overlay domain.
2. The system of claim 1 , wherein each address of the address space is available to an overlay domain other than the at least one overlay domain.
3. The system of claim 1 , wherein denying the assignment of the address prevents a duplicate address assignment within the at least one overlay domain.
4. The system of claim 1 , the method further comprising:
permitting an assignment of a second address in response to determining that an assignment of the second address does not result in a conflict of addresses amongst the at least one overlay domain.
5. A method comprising:
receiving an assignment of an address in an address space from a tenant on at least one overlay domain overlaying a physical network, wherein each of the at least one overlay domain shares the address space with the physical network, and a virtual machine of the at least one overlay domain communicates with the physical network without requiring address translation;
determining whether the assignment of the address results in a conflict of addresses amongst the at least one overlay domain by detecting whether there is a conflict of addresses within a cluster with a minimal number of hops within the cluster, wherein a location within the address space resulting in a conflict of addresses within the cluster is detected in at most two hops within the cluster; and
denying the assignment of the address in response to determining the assignment of the address results in a conflict of addresses amongst the at least one overlay domain.
6. The method of claim 5 , wherein each address of the address space is available to an overlay domain other than the at least one overlay domain.
7. The method of claim 5 , wherein denying the assignment of the address prevents a duplicate address assignment within the at least one overlay domain.
8. The method of claim 5 , further comprising:
permitting an assignment of a second address in response to determining that an assignment of the second address does not result in a conflict of addresses amongst the at least one overlay domain.
9. A computer program product comprising a computer-readable hardware storage device having program code embodied therewith, the program code being executable by a computer to implement a method comprising:
receiving an assignment of an address in an address space from a tenant on at least one overlay domain overlaying a physical network, wherein each of the at least one overlay domain shares the address space with the physical network, and a virtual machine of the at least one overlay domain communicates with the physical network without requiring address translation;
determining whether the assignment of the address results in a conflict of addresses amongst the at least one overlay domain by detecting whether there is a conflict of addresses within a cluster with a minimal number of hops within the cluster, wherein a location within the address space resulting in a conflict of addresses within the cluster is detected in at most two hops within the cluster; and
denying the assignment of the address in response to determining the assignment of the address results in a conflict of addresses amongst the at least one overlay domain.
10. The computer program product of claim 9 , wherein each address of the address space is available to an overlay domain other than the at least one overlay domain.
11. The computer program product of claim 9 , wherein denying the assignment of the address prevents a duplicate address assignment within the at least one overlay domain.
12. The computer program product of claim 9 , the method further comprising:
permitting an assignment of a second address in response to determining that an assignment of the second address does not result in a conflict of addresses amongst the at least one overlay domain.