INTEROPERABILITY OF DATA PLANE BASED OVERLAYS AND CONTROL PLANE BASED OVERLAYS IN A NETWORK ENVIRONMENT

• US 20140269702A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Moreno, Victor Manuel, Cox, Ian Bruce Bernard
• Granted Patent: US 8,982,707 B2
• Time in Patent Office: Days
• US Class Current: 370/390
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 45/64 using an overlay routing layer
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]

Abstract

Technologies are provided in example embodiments for intercepting a packet being multicast from a first tunnel endpoint in a network, determining first address mapping information of the first tunnel endpoint and a first host, wherein the first host created the packet, generating a control protocol message with the first address mapping information, and communicating the control protocol message through a control plane in the network. In more specific example embodiments, the communicating the control protocol message includes sending the control protocol message to a network repository, where the first address mapping information is registered in the network repository. In other more specific example embodiments, the communicating the control protocol message includes pushing the control protocol message to one or more other tunnel endpoints. Further embodiments include decapsulating the packet to determine an endpoint identifier of the first host and a location of the first tunnel endpoint.

Claims

1. A method, comprising:

intercepting a packet being multicast from a first tunnel endpoint in a network;

determining first address mapping information of the first tunnel endpoint and a first host, wherein the first host created the packet;

generating a control protocol message with the first address mapping information; and

communicating the control protocol message through a control plane in the network.

2. The method of claim 1, wherein the communicating the control protocol message includes sending the control protocol message to a network repository, wherein the first address mapping information is registered in the network repository.

3. The method of claim 1, wherein the communicating the control protocol message includes pushing the control protocol message to one or more other tunnel endpoints.

4. The method of claim 1, wherein a second tunnel endpoint corresponding to a second host receives the first address mapping information through the control plane, wherein the second host is identified in the packet as a destination of the packet.

5. The method of claim 4, further comprising:

determining whether second address mapping information of the second host and the second tunnel endpoint is known; and

sending the packet to the second tunnel endpoint if the second address mapping information is known.

6. The method of claim 5, wherein the determining whether the second address mapping information is known includes one of querying a network repository and searching a local address mapping store.

7. The method of claim 5, further comprising:

encapsulating the packet, before the packet is sent, with a location of the second tunnel endpoint.

8. The method of claim 4, wherein the second tunnel endpoint determines whether the first address mapping information is known when the second tunnel endpoint receives a second packet from the second host with the first host identified in the second packet as a destination of the second packet.

9. The method of claim 8, wherein the second tunnel endpoint sends the second packet directly to the first tunnel endpoint, if the second tunnel endpoint determines the first address mapping information is known.

10. The method of claim 1, wherein the determining the first address mapping information includes decapsulating the packet to determine an endpoint identifier of the first host and a location of the first tunnel endpoint.

11. The method of claim 1, wherein the first tunnel endpoint is one of a virtual switch and a physical switch, and wherein the second tunnel endpoint is one of a virtual switch and a physical switch.

12. At least one non-transitory, machine readable storage medium having instructions stored therein, the instructions when executed by a processor cause the processor to:

intercept a packet being multicast from a first tunnel endpoint in a network;

determine first address mapping information of the first tunnel endpoint and a first host, wherein the first host created the packet; and

generate a control protocol message with the first address mapping information; and

communicate the control protocol message through a control plane in the network.

13. The medium of claim 12, further comprising instructions that when executed by a processor cause the processor to:

send the control protocol message to a network repository, wherein the first address mapping information is registered in the network repository.

14. The medium of claim 12, further comprising instructions that when executed by a processor cause the processor to:

push the control protocol message to one or more other tunnel endpoints.

15. The medium of claim 12, further comprising instructions that when executed by a processor cause the processor to:

determine the first address mapping information by decapsulating the packet to identify the first host and a network address of the first tunnel endpoint.

16. An apparatus, comprising:

at least one memory element having instructions stored therein; and

at least one processor, wherein the instructions when executed by the at least one processor, cause the processor to;

intercept a packet being multicast from a first tunnel endpoint in a network;

determine first address mapping information of the first tunnel endpoint and a first host, wherein the first host created the packet; and

generate a control protocol message with the first address mapping information; and

communicate the control protocol message through a control plane in the network.

17. The apparatus of claim 16, wherein a second tunnel endpoint corresponding to a second host is configured to receive the first address mapping information through the control plane, wherein the second host is identified in the packet as a destination of the packet.

18. The apparatus of claim 17, wherein the instructions when executed by the processor, further cause the processor to:

determine whether second address mapping information of the second host and a second tunnel endpoint is known; and

send the packet to the second tunnel endpoint if the second address mapping information is known.

19. The apparatus of claim 18, wherein the instructions when executed by the processor, further cause the processor to:

encapsulate the packet, before the packet is sent, with a location of the second tunnel endpoint.

20. The apparatus of claim 18, wherein the packet is sent via a data plane in the network.