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Method and device of flooding suppression

A technology of flooding and entry, applied in the field of communication, can solve the problem of wrong forwarding of destination IP data packets

Active Publication Date: 2017-06-27
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when a VM uses a forged IP address as the source IP to construct and send an ARP packet, since the VTEP cannot distinguish whether the forged IP address is the VM's own IP address, the VTEP will also create an ARP packet for the forged source IP address. Corresponding ARP flood suppression entry, resulting in data packets with the destination IP address being incorrectly forwarded to the VM

Method used

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Embodiment Construction

[0016] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] One of the core concepts of the embodiments of the present invention is to propose a flood suppression method and a flood suppression device to prevent the VM from sending ARP by forging the source IP, causing the VTEP to create a wrong ARP flood suppression entry, causing traffic to be incorrectly Forward. Wherein, the flood suppression method is applied to a VXLAN network, and the VXLAN network includes a VTEP and a VM. Specifically, after the VTEP receives the ARP request message sent by the VM, it unicasts free ARP to the VM. message, when receiving the VM's response to the unicast ARP message, then create an entry corresponding to the source IP address in its type ARP flood suppression table; thus, VTEP can target the ...

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Abstract

The embodiment of the invention provides a method and device of flooding suppression, which are used in VXLAN (Virtual eXtensible LAN). The VXLAN includes VTEPs (VXLAN Tunnel End Point) and VMs (virtual machine). The method includes steps as follows: an ARP (Address Resolution Protocol) request message sent by a VM is received and parsed by a VTEP; according to the parsed ARP request message, gratuitous ARP messages are sent to the VM in the form of unicast; when a response from the VM aiming at the gratuitous ARP messages is received, a first ARP flooding suppression list item is established; and the ARP request message is encapsulated as a VXLAN-encapsulated ARP request message, and sent to the other VTEPs in the VXLAN, wherein the first ARP flooding suppression list item includes the source IP address and the source MAC address corresponding to the ARP request message. Thus the correctness of the established ARP list items is guaranteed. The forwarding of flow by mistake is prevented.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a flood suppression method and a flood suppression device. Background technique [0002] Because the scalable virtual local area network (Virtual eXtensible LAN, VXLAN) can deploy virtual networks as needed without reconfiguring the physical network; it can also support large-scale network deployment in a multi-tenant environment, so VXLAN networks are widely used . [0003] When a virtual machine (Virtual Machine, VM) in the VXLAN network sends data packets to other VMs, it will send an Address Resolution Protocol (Address Resolution Protocol, ARP) message, after VTEP receives the ARP request message, it will broadcast the ARP request message to other VTEPs or local sites in the VXLAN network; in order to prevent the ARP request message sent by broadcast from occupying the core network bandwidth, prior art , after the VTEP receives the ARP Request and ARP Reply packets ...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L12/46
CPCH04L12/4641H04L61/103
Inventor 吴云
Owner NEW H3C TECH CO LTD
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