ADDRESS RESOLUTION SUPPRESSION FOR DATA CENTER INTERCONNECT

• US 20130254359A1
• Filed: 03/23/2012
• Published: 09/26/2013
• Est. Priority Date: 03/23/2012
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Boutros, Sami, Salam, Samer, Sajassi, Ali, Filsfils, Clarence
• Granted Patent: US 9,548,959 B2
• Time in Patent Office: Days
• US Class Current: 709/223
• 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 61/58 Caching of addresses or names

Abstract

An example method is provided that includes determining whether an address resolution protocol reply from a local machine has been received at an edge node; updating a local cache based on the reply from the local machine; and sending the reply to a plurality of edge nodes through a data plane of a data center interconnect. In more specific implementations, the method can include determining whether an address resolution protocol request has been received from the local machine. The method could also include updating a local machine cache based on the request. In certain implementations, the method can include determining whether the request is targeting the local machine; and dropping the request if the request is targeting the local machine. The method could also include sending the request through the data center interconnect if the request is not targeting the local machine.

Claims

1. A method, comprising:

determining whether an address resolution protocol reply from a local machine has been received at an edge node;

updating a local cache based on the reply from the local machine; and

sending the reply to a plurality of edge nodes through a data plane of a data center interconnect.

2. The method of claim 1, further comprising:

determining whether an address resolution protocol request has been received from the local machine.

3. The method of claim 2, further comprising:

updating a local machine cache based on the request.

4. The method of claim 2, further comprising:

determining whether the request is targeting the local machine; and

dropping the request if the request is targeting the local machine.

5. The method of claim 4, further comprising:

sending the request through the data center interconnect if the request is not targeting the local machine.

6. The method of claim 2, further comprising:

determining whether an address binding for a particular machine that the request is targeting exists in a local cache; and

sending the address binding to the particular machine using an address resolution protocol reply message.

7. The method of claim 6, further comprising:

sending the request through the data center interconnect if the address binding for the target machine does not exist in the local cache.

8. The method of claim 1, further comprising:

determining whether an address resolution protocol request has been received from a remote machine in a data plane; and

sending the request to at least one local machine.

9. The method of claim 1, further comprising:

determining whether a particular address resolution protocol reply sent using a multi-destination delivery technique has been received through the data plane of the data center interconnect;

determining whether the particular reply is destined for the local machine; and

sending the particular reply to the local machine if the particular reply is destined for the local machine.

10. The method of claim 9, further comprising:

adjusting a local cache based on an address binding in the particular reply.

11. An apparatus, comprising:

a processor; and

a memory coupled to the processor, wherein the processor is configured to execute instructions associated with switch logic such that the apparatus is configured for;

determining whether an address resolution protocol reply from a local machine has been received at an edge node;

updating a local cache based on the reply from the local machine; and

sending the reply to a plurality of edge nodes through a data plane of a data center interconnect.

12. The apparatus of claim 11, wherein the apparatus is further configured for:

determining whether an address resolution protocol request has been received from the local machine; and

updating a local machine cache based on the request.

13. The apparatus of claim 12, wherein the apparatus is further configured for:

determining whether the request is targeting the local machine; and

dropping the request if the request is targeting the local machine.

14. The apparatus of claim 13, wherein the apparatus is further configured for:

sending the request through the data center interconnect if the request is not targeting the local machine.

15. The apparatus of claim 12, wherein the apparatus is further configured for:

determining whether an address binding for a particular machine that the request is targeting exists in a local cache; and

sending the address binding to the particular machine using an address resolution protocol reply message.

16. Logic encoded in one or more non-transitory media that includes code for execution and when executed by one or more processors is operable to perform operations comprising:

determining whether an address resolution protocol reply from a local machine has been received at an edge node;

updating a local cache based on the reply from the local machine; and

sending the reply to a plurality of edge nodes through a data plane of a data center interconnect.

17. The logic of claim 16, the operations further comprising:

determining whether an address resolution protocol request has been received from the local machine.

18. The logic of claim 17, the operations further comprising:

updating a local machine cache based on the request.

19. The logic of claim 17, the operations further comprising:

determining whether the request is targeting the local machine; and

dropping the request if the request is targeting the local machine.

20. The logic of claim 16, the operations further comprising:

determining whether a particular address resolution protocol reply sent using a multi-destination delivery technique has been received through the data plane of the data center interconnect;

determining whether the particular reply is destined for the local machine; and

sending the particular reply to the local machine if the particular reply is destined for the local machine.