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A 4over6 dynamic address allocation server failover method

A technology of dynamic address allocation and failover, applied in the Internet field, can solve problems such as decreased user satisfaction and unstable network links, and achieve the effects of improving user satisfaction, good scalability, and preventing users from going offline

Active Publication Date: 2017-02-15
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Users need to go through the process of going offline and going online again, the network link is not stable enough, and user satisfaction decreases

Method used

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  • A 4over6 dynamic address allocation server failover method
  • A 4over6 dynamic address allocation server failover method
  • A 4over6 dynamic address allocation server failover method

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Embodiment Construction

[0024] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0025] The present invention proposes a 4over6 dynamic address allocation server failure backup method. The basic idea is that the DHCPv4-over-DHCPv6 server maintains the same lease information as the DHCPv4-over-DHCPv6 backup server under normal conditions, and the backup server keeps silent state. When the backup server finds that the connection with the main server fails, the backup server changes into a normal mode, and supports the function of providing lease information to the main server.

[0026] To implement this method, a Lightweight4over6 tunnel must first be established. Such as figure 1 As shown, the network involved in the method of the present invention includes a 4over6 tunnel convergence point TC, a DHCPv4-over-DHCPv6 server, a DHCPv6 server, and a 4over6 tunnel initiation point TI. In order to make the mechanism safer and ea...

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Abstract

Disclosed is a 4over6 dynamic address distribution server failure backup method. First of all, a Lightweight 4over6 tunnel is established, a network tunnel comprises a DHCPv4-over-DHCPv6 server and a DHCPv4-over-DHCPv6 backup server which are connected in the same multicast domain and share the same IPv6 address pool and the same IPv4 address pool, and the DHCPv4-over-DHCPv6 backup server is configured with an extra IPv6 address pool and an extra IPv4 address pool; the DHCPv4-over-DHCPv6 backup server maintains at a salient state and does not respond to a DHCP message when it is determined that the DHCPv4-over-DHCPv6 server works normally; and when the DHCPv4-over-DHCPv6 server fails or the DHCPv4-over-DHCPv6 backup server cannot maintain connected with the DHCPv4-over-DHCPv6 server, the DHCPv4-over-DHCPv6 backup server is converted to a normal mode from a salient mode, and the DHCP message is processed, such that the network stability can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of the Internet, in particular to a 4over6 dynamic address allocation server failure backup method. Background technique [0002] A 128-bit address used by an IPv6 address, that is, there are approximately 3.4×10 38 addresses, which is about 7.9×10 of the amount provided by IPv4 addresses 28 times, it can be said that IPv6 has an almost unlimited address space. Furthermore, compared with other new technologies, IPv6 is the only technology in the world that is relatively mature and suitable for large-scale deployment. Therefore, IPv6 technology has become the best choice to solve the shortage of address resources at present, and it meets the increasing address demand of the current Internet. However, due to the existence of a large number of IPv4 services and the shortage of IPv4 addresses, in order to ensure that IPv4 services can still be used during the transition to IPv6, operators tend to allocate the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/46H04L29/12
Inventor 崔勇王钰琪
Owner TSINGHUA UNIV
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