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Efficient Address resolution in DOVE network

IP.com Disclosure Number: IPCOM000236018D
Publication Date: 2014-Apr-02
Document File: 1 page(s) / 45K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method for efficient address resolution in a Distributed Overlay Virtual Ethernet (DOVE) network is disclosed.

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Efficient Address resolution in DOVE network

Disclosed is a method for efficient address resolution in a Distributed Overlay Virtual Ethernet (DOVE) network.

Overlay networks require a mapping from target Virtual Machine (VM) to the host/bridge endpoint that is hosting the VM. When IP multicast is utilized, packets are flooded to all OBPs participating in the virtual network if the target is unknown.

The flooding may be avoided by supporting a "ARM reduction module". A caching scheme is utilized for address resolution. If the information is not in the cache then the request is sent to the "ARM reduction module, which resolves the address.

As depicted in the Figure below, a DOVE agent is responsible for configuring the DOVE module and utilizes Distributed Packet Service ( DPS) which maintains a distributed mapping (DM) database. It understands the utilized Network Interface Card (NIC).

Figure

The DOVE agent configures the DOVE module which receives the packets and knows the domain id

Address Resolution Protocol (ARP) request by a VM on the local bridge is received by DOVE module (DM) DM looks up cache for the target IP. If not found sends a request message to DOVE Agent (DA).

If the target is local the response is not seen by DM.

DA will know of the local machine and will respond to DM. (See VM create diagram to see how the DA caches the information)

b.

DOVE agent communicates to the DPS and receives the response DA sends: target VM MAC and DVG, target host IP ad...