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Method and device for virtual network access to external network

A technology of virtual network and external network, applied in the field of computer network, can solve the problem of unguaranteed sending order, etc., achieve the effect of reducing the number of flow tables, reducing the impact, and improving system performance

Active Publication Date: 2019-01-08
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The execution of multiple actions needs to be performed in order of priority, but the order of sending packets is not guaranteed

Method used

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  • Method and device for virtual network access to external network
  • Method and device for virtual network access to external network
  • Method and device for virtual network access to external network

Examples

Experimental program
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Embodiment Construction

[0043] In order to access the external network from the virtual network, for example, to access the traditional physical network from the virtual network to realize the connection between the virtual network and the traditional physical network, one solution is to deploy an external network gateway device in the network, and the external network The gateway device is used to connect the virtual network and the external network. When a device in the virtual network wants to access a server in the external network, the corresponding traffic will be forwarded to the external network gateway for unified forwarding.

[0044] figure 1 It is a schematic diagram of the virtual network accessing the external network based on the external network gateway device.

[0045] Such as figure 1 as shown,figure 1 The virtual network in the example above is an Overlay network. In the Overlay network, the next hop of the default route of each virtual machine (VM) is the VM gateway. The source V...

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Abstract

The invention discloses a method and a device for a virtual network to access an external network. The method includes: delivering routing information and address resolution protocol (ARP) entry information to the virtual machine, the routing information indicating that the next hop of traffic destined for the external network is a pre-created logical external network gateway, and the ARP entry The information includes the MAC address of the logical external network gateway; a flow table is sent to the switch, and the flow table indicates that the traffic with the MAC address of the logical external network gateway as the destination MAC address is forwarded to the actual external network gateway. By applying the embodiment of the present invention, it is possible to access a network other than the virtual network from the virtual network.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to a method and a device for a virtual network to access an external network. Background technique [0002] The OpenFlow network is a new type of network proposed by Stanford University. It enables traditional Layer 2 and Layer 3 switches to have fine-grained flow forwarding capabilities, that is, from traditional MAC address-based forwarding and IP address-based forwarding to Flow forwarding based on packet header description. At the same time, the traditional control plane is separated from the forwarding device, and all forwarding behavior decisions are "migrated" from the switch itself to the controller. [0003] Specifically, the OpenFlow network includes a controller (Controller) and a switch (Switch). The controller sends a flow table to the switch, and the switch performs packet search and forwarding according to the flow table. [0004] Each flow entry of the fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12H04L12/741H04L45/74
CPCH04L61/103G06F9/455G06F9/45558G06F2009/45595H04L49/70H04L45/64H04L45/42
Inventor 宋渊傅嘉嘉
Owner NEW H3C TECH CO LTD