WO2012034428A1 - Procédé et nœud de service pour réattribution d'adresse ip - Google Patents

Procédé et nœud de service pour réattribution d'adresse ip Download PDF

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Publication number
WO2012034428A1
WO2012034428A1 PCT/CN2011/076129 CN2011076129W WO2012034428A1 WO 2012034428 A1 WO2012034428 A1 WO 2012034428A1 CN 2011076129 W CN2011076129 W CN 2011076129W WO 2012034428 A1 WO2012034428 A1 WO 2012034428A1
Authority
WO
WIPO (PCT)
Prior art keywords
service node
ipv6 address
ipv6
address prefix
user
Prior art date
Application number
PCT/CN2011/076129
Other languages
English (en)
Chinese (zh)
Inventor
陈新辉
袁博
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012034428A1 publication Critical patent/WO2012034428A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources

Definitions

  • the present invention relates to a broadband access network, and more particularly to a method and a service node for reallocating an IP address for SLAAC (Stateless Address Assignment) access.
  • SLAAC Stateless Address Assignment
  • the basic networking of the existing broadband access network includes: the user host accesses the service node (SN) device through the access node (AN) device, and obtains the address and the user policy allocated by the operator on the SN device. .
  • User access now includes IPv4 and IPv6 access.
  • the IPv6 renumbering technology is one of the standard technologies of IPv6.
  • the IPv6 address redistribution technology requires the router to redistribute the IPv6 prefix because the user host relies on the IPv6 prefix to generate an IPv6 address.
  • the router that assigns an IPv6 address can change the IPv6 address of the IPv6 host so that the IPv6 host can communicate with the new address.
  • Scenario 1 The privilege of the operator to control IPv6 prefix 1 is different from that of IPv6 prefix 2. If the IPv6 host uses the address generated by IPv6 prefix 1, if there is a need to change the privilege, for example, you need to access the new network to use the new one. Service, then the user must use the address generated by IPv6 prefix 2, in which case the IPv6 router is required to re-assign the prefix to the user.
  • Scenario 2 The operator has modified the prefix that IPv6 users can use because of networking and planning. In this case, the operator needs to inform the user of the new IPv6 prefix so that the IPv6 user can re-acquire the address. In this case, the IPv6 address redistribution function is also required. .
  • the current IPv6 broadband access architecture mainly implements IPv6 address allocation on the SN (serving node). There are two ways to allocate IPv6 addresses for the SN, SLAAC (stateless address allocation) and DHCPv6.
  • the SN has a DHCPv6 Reconfigure (Reconfiguration) to solve the IPv6 address redistribution problem.
  • the SN sends a reconfigured message to the DHCPv6 client to trigger the user to reacquire the privileged address.
  • the traditional SN uses the IPv6 address redistribution function only when the update is configured on the SN.
  • the support for IPv6 address redistribution is far from enough.
  • the main object of the present invention is to provide a method and a service node for IPv6 address reallocation to implement reallocation of IPv6 addresses in the case of SLAAC access.
  • the present invention provides an IP address reallocation method, including: when the user's authority on the service node changes, the service node performs IP address reallocation on the user end.
  • the above method may also have the following feature: the service node performs IP address reallocation on the user end, including:
  • the serving node sends the IPv6 address prefix and the reassigned IPv6 address prefix of the client to the client, and the Preferred Lifetime and Valid Lifetime of the existing IPv6 address prefix are set to 0.
  • the foregoing method may further include the following steps: the step of the serving node sending the IPv6 address prefix and the reassigned IPv6 address prefix of the user end to the user end includes: the service node advertises through a router The existing IPv6 address prefix and the reassigned IPv6 address prefix are sent to the user end; or the IPv6 address prefix and the reassigned IPv6 of the user end are respectively obtained through two router advertisement messages. The address prefix is sent to the client.
  • the user rights change on the service node includes:
  • the method may further include the following feature: before the user node performs address reallocation on the user end, the method further includes: The client accesses the service node through the SLAAC mode;
  • the step of the user accessing the service node in the SLAAC mode includes: obtaining the IPv6 address prefix by using the SLAAC, or indirectly obtaining the IPv6 address prefix by using the SLAAC.
  • the present invention also provides a service node, where the service node is configured to perform IP address reallocation on the client when the authority of the client on the service node is changed.
  • the service node may also have the following feature: the service node is configured to send an IPv6 address prefix and a re-allocated IPv6 address prefix that are existing to the user end to the user end, and the existing IPv6 address prefix is Preferred Lifetime and Valid Lifetime are set to 0.
  • the foregoing service node may be configured to send the IPv6 address prefix and the re-allocated IPv6 address prefix of the user end to the user end through a router advertisement message; or, The two router advertisements are sent to the client by the IPv6 address prefix and the reassigned IPv6 address prefix respectively.
  • the foregoing service node may also have the following feature: the permission change of the user end on the service node includes: after the user end performs authentication, a permission change occurs, or the service node changes the authority of the user end.
  • the service node may also have the following characteristics: the service node is a broadband remote access server (BRAS) or a monthly service router (SR).
  • BRAS broadband remote access server
  • SR monthly service router
  • the present invention further provides an IP address reconfiguration apparatus, which is applied to a service node, and includes: a judging module, configured to: determine whether a user end has a privilege on the service node; and
  • the address redistribution module is configured to: when the determining module determines that the user end has changed the authority on the service node, performing IP address reallocation on the user end.
  • the foregoing apparatus may further have the following feature: the address re-allocation module is configured to: send an IPv6 address prefix existing by the user end and a re-allocated IPv6 address prefix to the user end, and the existing IPv6 address The preferred lifetime and effective lifetime of the prefix are set to zero.
  • the device may also have the following features: the address redistribution module is configured to: use an IPvA advertisement message to forward the IPv6 address prefix and the reassigned IPv6 address of the client.
  • the prefix is sent to the user end; or the IPv6 address prefix and the reassigned IPv6 address prefix of the user end are respectively sent to the user end by using the router advertisement message twice.
  • the invention realizes address redistribution when the authority is changed. BRIEF abstract
  • FIG. 1 is a schematic diagram of a network topology according to the present invention.
  • Figure 3 is a flow chart of the first embodiment of the present invention.
  • Figure 4 is a flow chart of a second embodiment of the present invention.
  • Figure 5 is a flow chart of a third embodiment of the present invention. Preferred embodiment of the invention
  • IPv6 addresses may be used to assign different permissions to users.
  • the present invention provides an IPv6 address reallocation technique for accessing users in the SLAAC mode when the rights are changed.
  • the method for re-allocating the IPv6 address of the IPv6 address in the SLAAC is established on the basis that the IPv6 host obtains the IPv6 address through the SLAAC, and when the user rights on the SN are changed, the old IPv6 prefix is used.
  • the Preferred Lifetime and Valid Lifetime fields are set to 0 to achieve customer IPv6 address changes.
  • IPv6 address reallocation method of the embodiment of the present invention is applied to an IPv6 network, as shown in FIG. 2, and includes the following steps:
  • the IPv6 client generates an IPv6 address by using the SLAAC method.
  • the IPv6 client includes the IPv6 client that obtains the IPv6 prefix through the SLAAC, and the user that obtains the IPv6 prefix indirectly through the SLAAC mode, such as the PPPoEv6 or the L2TPv6.
  • IPv6 client changes the privilege on the SN
  • the SN determines the IPv6 after the privilege is changed. Users need IPv6 address redistribution;
  • the change of the privilege of the IPv6 client including the change of the privilege of the IPv6 client through authentication, for example, the web authentication, and the change of the IPv6 client privilege, such as the CO A (Change of authorization) authorization, by the policy server.
  • authentication for example, the web authentication
  • CO A Change of authorization
  • SN which includes traditional BRAS (Broadband Remote Access Server), SR (Service Router), and other switches and routers with IPv6 SLAAC allocation.
  • BRAS Broadband Remote Access Server
  • SR Service Router
  • IPv6 SLAAC allocation IPv6 SLAAC allocation
  • the SN immediately triggers an RA (Router Advertisement) message through its ND (Neighbor Discovery) module.
  • the RA message includes an old IPv6 prefix option and a re-allocated IPv6 prefix option.
  • the Preferred Lifetime and Valid Lifetime of the old IPv6 prefix are set to 0;
  • the IPv6 prefix option can also be obtained by using the authentication (for example, IPSec).
  • the new and old prefixes of the IPv6 client can also be sent to the IPv6 client through the two RA packets.
  • the new network connection of the IPv6 client will communicate using the new IPv6 prefix.
  • the IP address reconfiguration apparatus of the embodiment of the present invention is applied to the service node, and includes: a determining module, configured to: determine whether the authority of the user end on the service node is changed; and an address redistribution module, where: the determining module When it is determined that the user's authority on the service node is changed, the IP address is redistributed to the client.
  • Step 301 The web authentication user obtains an IPv6 address through the SLAAC, and the status of the SN is unauthenticated.
  • Step 302 The web authentication user passes the web authentication. After the authentication, the SN determines that the user authority changes and needs to redistribute the IPv6 address prefix of the user.
  • Step 303 The SN sends an RA message, where the RA message includes an old IPv6 prefix option and a reassigned IPv6 prefix option. At this time, the Preferred Lifetime and Valid Lifetime of the old IPv6 prefix are set to 0.
  • Step 304 The IPv6 client uses the IPv6 address generated by the new IPv6 prefix as the preferred address according to the Preferred Lifetime and Valid Lifetime options of the old IPv6 prefix in the RA message, and the user accesses the network by using the new IPv6 address.
  • the user goes online to obtain an IPv6 address through the SLAAC.
  • the external policy server changes the user rights through the COA. As shown in Figure 4, it includes:
  • Step 401 The user obtains an IPv6 address through the SLAAC.
  • Step 402 The external policy server requests the SN to change the user authority and triggers the IPv6 re-allocation through the COA, and the SN initiates the IPv6 address reallocation according to the requirement of the external policy server.
  • Step 403 The SN sends an RA message, where the RA message includes an old IPv6 prefix option and a reassigned IPv6 prefix option. At this time, the Preferred Lifetime and Valid Lifetime of the old IPv6 prefix are set to 0.
  • Step 404 The IPv6 client uses the IPv6 address generated by the new IPv6 prefix as the preferred address according to the Preferred Lifetime and Valid Lifetime options of the old IPv6 prefix in the RA message, and the user accesses the network by using the new IPv6 address.
  • Step 501 The user obtains an IPv6 address by using the SLAAC.
  • Step 502 The user logs in to the operator's webpage, and the value-added service is clicked.
  • the COPS server of the operator's website backend changes the permission of the user to access the webpage through the COPS protocol;
  • Step 503 The SN sends an RA message, where the RA message includes an old IPv6 prefix option and a re-allocated IPv6 prefix option. At this time, the Preferred Lifetime and Valid Lifetime of the old IPv6 prefix are set to 0.
  • Step 504 The IPv6 client uses the IPv6 address generated by the new IPv6 prefix as the preferred address according to the Preferred Lifetime and Valid Lifetime options of the old IPv6 prefix in the RA message, and the user accesses the network by using the new IPv6 address.
  • Step 505 The user uses the value-added service to cancel the value-added service on the operator's web page.
  • the backend of the operator cancels the value-added service authority on the SN through the COPS protocol;
  • Step 506 The SN sends an RA message, where the RA message includes an IPv6 prefix option that can use the value-added service and a re-allocated IPv6 prefix option.
  • the Preferred Lifetime and the Valid Lifetime of the IPv6 prefix of the value-added service are set to 0. ;
  • Step 507 the IPv6 client can use the IPv6 prefix of the value-added service according to the RA 4 message.
  • the Preferred Lifetime and Valid Lifetime options use the IPv6 address generated based on the reassigned IPv6 prefix as the preferred address, and the user accesses the network using the new IPv6 address.
  • the present invention realizes address reallocation when a authority is changed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur un procédé, un dispositif et un nœud de service pour réattribution d'adresse de protocole Internet (IP). Le procédé comprend les étapes suivantes : lorsque la permission de l'extrémité utilisateur sur un nœud de service est modifiée, le nœud de service réattribue une adresse IP pour l'extrémité utilisateur. L'invention réalise la réattribution d'adresse lorsque la permission est modifiée.
PCT/CN2011/076129 2010-09-14 2011-06-22 Procédé et nœud de service pour réattribution d'adresse ip WO2012034428A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010289068.8 2010-09-14
CN2010102890688A CN101945144A (zh) 2010-09-14 2010-09-14 一种ip地址重分配的方法和服务节点

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WO2012034428A1 true WO2012034428A1 (fr) 2012-03-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101945144A (zh) * 2010-09-14 2011-01-12 中兴通讯股份有限公司 一种ip地址重分配的方法和服务节点
CN102932371B (zh) * 2012-11-20 2015-09-09 杭州华三通信技术有限公司 实现IPv6私网节点与公网节点之间通信的方法及路由转发设备
CN105516375A (zh) * 2014-09-24 2016-04-20 中兴通讯股份有限公司 一种IPv6地址管理方法、装置、终端和网关设备
CN107547528B (zh) * 2017-08-18 2020-04-24 新华三技术有限公司 IPv6无状态地址分配方法及装置

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CN1929496A (zh) * 2005-09-09 2007-03-14 上海贝尔阿尔卡特股份有限公司 IPv6接入网络中网络地址重构方法
CN101184099A (zh) * 2007-12-14 2008-05-21 中兴通讯股份有限公司 基于动态主机配置协议接入认证的二次ip地址分配方法
CN101753635A (zh) * 2008-12-17 2010-06-23 华为技术有限公司 Ipv6地址配置方法和系统
CN101945144A (zh) * 2010-09-14 2011-01-12 中兴通讯股份有限公司 一种ip地址重分配的方法和服务节点

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CN1248455C (zh) * 2003-02-21 2006-03-29 北京润汇科技有限公司 宽带网用户接入管理系统
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CN1929496A (zh) * 2005-09-09 2007-03-14 上海贝尔阿尔卡特股份有限公司 IPv6接入网络中网络地址重构方法
CN101184099A (zh) * 2007-12-14 2008-05-21 中兴通讯股份有限公司 基于动态主机配置协议接入认证的二次ip地址分配方法
CN101753635A (zh) * 2008-12-17 2010-06-23 华为技术有限公司 Ipv6地址配置方法和系统
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