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ARP for logical router

  • US 9,575,782 B2
  • Filed: 12/20/2013
  • Issued: 02/21/2017
  • Est. Priority Date: 10/13/2013
  • Status: Active Grant
First Claim
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1. A computing device serving as a host machine in a logical network, the computing device comprising:

  • a set of processing units; and

    a non-transitory machine readable medium storing a program for execution by at least one processing unit, the program comprising sets of instructions for;

    executing a plurality of virtual machines that are in a plurality of different segments of the logical network;

    operating a managed physical routing element (MPRE) for routing data packets between different segments of the logical network, the MPRE comprising a plurality of logical interfaces, each logical interface for receiving data packets from a different segment of the logical network, wherein each of the logical interfaces is addressable by a network layer address;

    intercepting an Address Resolution Protocol (ARP) broadcast message when a network layer destination address of the message matches the network layer address of one of the logical interfaces of the MPRE; and

    formulating and delivering an ARP reply based on a MAC (Media Access Control) address of the matching logical interface to the ARP broadcast message.

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