WO2015117389A1 - 运营商级网络地址转换cgn备份保护方法及装置 - Google Patents

运营商级网络地址转换cgn备份保护方法及装置 Download PDF

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Publication number
WO2015117389A1
WO2015117389A1 PCT/CN2014/089089 CN2014089089W WO2015117389A1 WO 2015117389 A1 WO2015117389 A1 WO 2015117389A1 CN 2014089089 W CN2014089089 W CN 2014089089W WO 2015117389 A1 WO2015117389 A1 WO 2015117389A1
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WIPO (PCT)
Prior art keywords
cgn
network user
private network
service
backup
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PCT/CN2014/089089
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English (en)
French (fr)
Inventor
王�锋
陈贵香
杜呈祥
Original Assignee
中兴通讯股份有限公司
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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
Priority to EP14881665.5A priority Critical patent/EP3185473B1/en
Priority to MYPI2017700575A priority patent/MY195047A/en
Publication of WO2015117389A1 publication Critical patent/WO2015117389A1/zh
Priority to ZA2017/01394A priority patent/ZA201701394B/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • 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
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2514—Translation of Internet protocol [IP] addresses between local and global IP addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to the field of communications, and in particular to a carrier-class network address translation CGN backup protection method and apparatus.
  • Carrier-grade network address translation is a device technology deployed in carriers. To solve the problem of exhaustion of public network addresses, carrier-class equipment has high reliability and perfection.
  • the backup protection mechanism is mainly used for cold standby and hot standby.
  • the service information of the cold standby refers to the real-time backup of the service information when the switch is switched to the standby device.
  • the hot backup refers to the real-time backup of the service information.
  • the backup of the unit or the dual-service unit is performed by means of redundant backup of the device.
  • the hot standby is backed up by two devices or service units, and the service is backed up by using the extended VRRP protocol or the private service information backup protocol.
  • a single solution with cold standby or hot standby cannot satisfy more application scenarios.
  • the main purpose of the embodiments of the present invention is to provide a carrier-grade network address translation CGN backup protection device and device, so as to solve the problem that the solution of using cold standby or hot standby in a prior art cannot meet more application scenarios.
  • a carrier-level network address translation CGN backup protection method including: detecting a service abnormality of a service unit in a CGN device service failure; determining deployment of the CGN device A backup mode corresponding to the deployment scenario is used for backup protection according to the determined deployment scenario.
  • the deployment scenario includes at least one of the following: one CGN device, two CGN devices, one of which is deployed side by side, and the two CGN devices deployed sideways.
  • performing the backup protection in the backup mode corresponding to the deployment scenario includes at least one of the following: performing the switching operation of at least one of the following when the CGN device service abnormality is detected: the private network user retreating Network user protection switching; private network user remote backup protection; private network user tunnel backup protection; private network User label backup protection; private network user type switching backup protection; when detecting the CGN device service recovery, perform at least one of the following back-cut operations: the public network user retries the private network user; the private network user remote Switchback protection; private network user tunnel protection; private network user label back protection; private network user type back protection.
  • the backup protection is performed by using the backup mode corresponding to the deployment scenario according to the determined deployment scenario.
  • the deployment scenario is a CGN device
  • the CGN device service is abnormal
  • the public network address is obtained by refreshing the terminal user address
  • the private network user is rolled back to the public network user protection switch; and when the CGN device service is restored, the public network user is switched back to the Private network users.
  • the backup protection is performed by using the backup mode corresponding to the deployment scenario according to the determined deployment scenario, that is, when the deployment scenario is two CGN devices, one of which is the CGN deployed sideways.
  • the device, the private network user tunnel backup switching and the failback include: when the CGN device service is abnormal, the tunnel tag is valid, and the private network user centrally collects the CGN device by using the tunnel encapsulation In the case of the CGN device service recovery, the tunnel tag is invalid, and the public network address is accessed after the intermediate device routes and forwards; when the deployment scenario is two CGN devices, one of which is side
  • the private network user tunnel backup switching and failback includes: when the CGN device service is abnormal, the label is valid, and the private network user is encapsulated by the label
  • the remote centralized CGN device performs service processing; in the case that the CGN device service is restored, the label tag is invalid, and the intermediate device routes and forwards the access public.
  • the private network user tunnel backup switching and failback includes: in the case that the CGN device service is abnormal, When the service unit service is aborted, the user goes offline and re-VPDN dials to obtain the private network or the public network address.
  • the private network user performs service processing on the remote LNS device, and the public network user directly on the remote LNS device.
  • Route forwarding in the case of the CGN device service recovery, the intermediate device accesses the public network after the route is forwarded.
  • a carrier-level network address translation CGN backup protection apparatus including: a detection module, configured to detect a service abnormality of a service unit in a CGN device service failure; determining a module, setting To determine the deployment scenario of the CGN device, the protection module is configured to perform backup protection according to the determined backup scenario and the backup mode corresponding to the deployment scenario.
  • the deployment scenario includes at least one of the following: one CGN device, two CGN devices, one of which is deployed side by side, and the two CGN devices deployed sideways.
  • the backup protection by using the backup mode corresponding to the deployment scenario includes at least one of the following: performing the switching operation of at least one of the following in the case that the CGN device service abnormality is detected: The user switches back to the public network user protection switch; the private network user remote backup protection; the private network user tunnel backup protection; the private network user label backup protection; the private network user type switch backup protection; the detection of the CGN equipment service recovery situation Then, perform at least one of the following operations: the public network user retries the private network user; the private network user remote protection; the private network user tunnel protection; the private network user label protection; the private network user type Cut back protection.
  • the protection module is further configured to: when the deployment scenario is a CGN device, if the CGN device service is abnormal, after the public network address is obtained by refreshing the terminal user address, The private network user reverts the public network user protection switch; and is used to return the public network user to the private network user when the CGN device service is restored.
  • the protection module is further configured to: when the deployment scenario is two of the CGN devices, one of which is a CGN device deployed sideways, and the private network user tunnel backup switching and failback includes: In the case where the CGN device service is abnormal, the tunnel tag is valid and the tunnel is encapsulated, and the private network user performs service processing on the remote centralized CGN device; in the case of the CGN device service recovery, the tunnel tag is invalid, and the intermediate device routes After the forwarding, the public network is accessed; when the deployment scenario is two of the CGN devices, one of which is the CGN device deployed on the side, and the private network user tunnel backup switching and failback includes: the CGN device service is abnormal.
  • the tag tag In the case of the tag tag, the tag is encapsulated, and the private network user performs the service processing on the remote centralized CGN device; in the case of the CGN device service recovery, the tag tag is invalid, and the intermediate device routes and forwards to access the public network.
  • the deployment scenario is two of the CGN devices, one of which is the CGN device deployed sideways, and the private network user type backup switching and failback includes:
  • the PPPOE user goes offline and re-VPDN dials to obtain the private network or public network address.
  • the private network user performs service processing on the remote LNS device, and the public network user is in the remote LNS device.
  • the intermediate device accesses the public network after the route is forwarded.
  • the method of the embodiment of the present invention adopts a service mode in which a service unit in a CGN device service fault is detected to be abnormal; a deployment scenario of the CGN device is determined; and a backup mode corresponding to the deployment scenario is adopted according to the determined deployment scenario. Make backup protection.
  • the solution that the cold standby or the hot standby is adopted in the prior art cannot solve the problem of more application scenarios, and improves the reliability and stability of the network.
  • FIG. 1 is a flowchart of a carrier-level network address translation CGN backup protection method according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a carrier-grade network address translation CGN backup protection apparatus according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a CGN backup protection method according to a preferred embodiment of the present invention.
  • FIGS. 4a-4c are schematic diagrams of deployment scenarios of a CGN device in accordance with a preferred embodiment of the present invention.
  • FIG. 1 is a flowchart of a carrier-level network address translation CGN backup protection method according to an embodiment of the present invention. The process includes the following steps:
  • Step S102 detecting that a service abnormality occurs in a service unit in a service fault of the CGN device
  • Step S104 Determine a deployment scenario of the CGN device.
  • step S106 the backup mode corresponding to the deployment scenario is used for backup protection according to the determined deployment scenario.
  • the embodiment of the present invention uses the backup mode corresponding to the deployment scenario to perform backup protection according to the scenario in which the CGN device service fault is detected.
  • the solution that the cold standby or the hot standby is adopted in the prior art cannot solve the problem of more application scenarios, and improves the reliability and stability of the network.
  • the deployment scenario includes, in addition to the BRAS user access management device, at least one of the following: one CGN device and two CGN devices, one of which is deployed sideways and two is deployed sideways.
  • performing the backup protection in the backup mode corresponding to the deployment scenario includes at least one of the following: performing the switching operation of at least one of the following when the CGN device service abnormality is detected: the private network user rolls back the public network user protection switch Private network user remote backup protection; private network user tunnel backup protection; private network user label backup protection; private network user type switching backup protection; when detecting CGN equipment service recovery, perform at least one of the following Operation: The public network user retries the private network user; the private network user remote protection protection; the private network user tunnel protection; the private network user label back protection; the private network user type back protection.
  • the backup mode corresponding to the deployment scenario is used for backup protection.
  • the deployment scenario is a CGN device
  • the CGN device service is abnormal
  • the terminal user address is obtained by refreshing the terminal user address.
  • the private network user is switched back to the public network user protection switch; in the case of the CGN device service recovery, the public network user is switched back to the private network user.
  • the backup mode corresponding to the deployment scenario is used for backup protection, including: when the deployment scenario is two CGN devices, one of which is a CGN device deployed side by side, and the private network user tunnel backup is switched back and back.
  • the method includes: when the CGN device service is abnormal, the tunnel tag is valid, and the tunnel is encapsulated, and the private network user performs service processing on the remote centralized CGN device; in the case of CGN device service recovery, the tunnel tag is invalid, and the intermediate device After the route is forwarded to the public network, the deployment scenario is two CGN devices, one of which is a CGN device deployed on the side.
  • the private network user tunnel backup switchover and failback include: labeling the label when the CGN device service is abnormal.
  • the deployment scenario is two CGN devices. One of them is a CGN device deployed side by side, and the private network user tunnel backup switching and failback includes: in the CGN equipment service When the service unit is aborted, the user re-routes the VPDN to obtain the private network or the public network address. The private network user performs the service processing on the remote LNS device. The public network user directly routes the remote LNS device. In the case of CGN device service recovery, the intermediate device routes to the public network after forwarding.
  • a carrier-level network address translation (CGN) backup protection device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • CGN carrier-level network address translation
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 2 is a schematic structural diagram of a carrier-level network address translation CGN backup protection apparatus according to an embodiment of the present invention.
  • the apparatus includes: a detection module 22 configured to detect a service abnormality of a service unit in a CGN equipment service failure;
  • the module 24 is coupled to the detection module 22 and configured to determine a deployment scenario of the CGN device.
  • the protection module 26 is coupled to the determination module 24, and is configured to perform backup protection according to the determined deployment scenario and the backup mode corresponding to the deployment scenario.
  • the deployment scenario includes at least one of the following: one CGN device, two CGN devices, one side-mounted deployment, and two side-mounted CGN devices.
  • the backup protection is performed by using the backup mode corresponding to the deployment scenario, including at least one of the following: performing the switching operation of at least one of the following when the CGN device service abnormality is detected: the private network user retreats Network user protection switching; private network user remote backup protection; private network user tunnel backup protection; private network user label backup protection; private network user type switching backup protection; in case of detecting CGN equipment service recovery, perform at least the following A switchback operation: the public network user retries the private network user; the private network user remote protection; the private network user tunnel protection; the private network user label protection; the private network user type back protection.
  • the protection module is further configured to: when the deployment scenario is a CGN device, if the CGN device service is abnormal, after the public network address is obtained by refreshing the terminal user address, the private network user is rolled back to the public network user. Protection switching; and for the public network user to switch back to the private network user in the case of CGN device service recovery.
  • the protection module is further configured to: when the deployment scenario is two CGN devices, one of which is a CGN device deployed side by side, and the private network user tunnel backup switching and failback includes: in the case that the CGN device service is abnormal, The tunnel tag is valid and the tunnel is encapsulated. The private network user performs the service processing on the remote centralized CGN device. In the case of the CGN device service recovery, the tunnel tag is invalid, and the intermediate device routes to the public network after the route is forwarded.
  • a CGN device one of which is a CGN device deployed on the side, and the private network user tunnel backup switchover and failback includes: when the CGN device service is abnormal, the tag is valid, and the tag is encapsulated, and the private network user is concentrated at the remote end.
  • the CGN device is used for service processing. In the case of CGN device service recovery, the tag is invalid, and the intermediate device is forwarded to the public network.
  • the deployment scenario is two CGN devices, one of which is a CGN device deployed side by side.
  • the network user type backup switchover and failback include: when the service of the CGN device is abnormal, when the service unit service is aborted, the user goes offline and re-V
  • the PDN dials the private network or the public network address.
  • the private network user performs the service processing on the remote LNS device.
  • the public network user directly routes and forwards the remote LNS device.
  • the intermediate device routes and forwards the access public. network.
  • the main purpose of the preferred embodiment of the present invention is to provide a CGN backup protection method and device, which can solve the problem encountered in the backup protection scenario of a single CGN device or multiple devices, and the method provides high reliability and stability of the network. It also increases the flexibility of deployment while being transparent to end users.
  • the preferred embodiment of the present invention employs the following technical solutions.
  • the reliability switching action occurs when the service of the CGN device is abnormal.
  • the switching action includes: private network user rollback public network user protection switching; private network user remote backup protection; private network user tunnel backup protection; private network user label backup protection; Private network user type switch backup protection.
  • the public network user retries the private network user; the private network user remotely cuts the protection; the private network user tunnels cut back protection; the private network user label back protection; the private network user type retries protection.
  • the private network user and the public network user switch and switch back; the preferred implementation method is as follows: the user goes online to check the status of the service unit, delivers the user attribute, and preferentially obtains the private address when the service unit is available, and refreshes the user attribute when the service unit is aborted. The end user regains the public network address.
  • the remote backup of the private network is switched and switched back.
  • the specific implementation method is as follows: Configure the remote backup mode of the private network user. The user can obtain the private network address when the service unit is aborted. The remote centralized CGN device performs business processing.
  • the private network user tunnels are switched and switched back; preferably, the method is as follows: the private network user tunnel backup mode is configured, and the user accesses the private network address when the service unit is normal, the tunnel label is invalid, and the intermediate device routes and forwards. After accessing the public network, the tunnel tag is valid when the service unit is aborted. The private network user performs the service processing on the remote centralized CGN device.
  • the processing of the tunnel tag can be performed by setting the tag directly in the tunnel module by matching the source address of the user, or by setting the priority of the tunnel route, or by setting the CGN and the tunnel mutual exclusion flag.
  • the private network user label is switched and switched back; preferably, the method is as follows: the private network user label backup mode is configured, and the user obtains the private network address when the service unit is normal, and the label of the label is invalid when the service unit is normal. On the public network, when the service unit is suspended, the label is valid. The label is encapsulated.
  • the private network user performs the service processing on the remote centralized CGN device.
  • the label tag processing can be set directly in the tag module by matching the user source address. It can also be implemented by setting the priority of the label route, and also setting the CGN and label mutex markup.
  • the private network user type is switched and switched back; the preferred method is: configuring the private network user type backup mode, and the user PPPoE is online to obtain the private network address.
  • the intermediate device routes and forwards to access the public network.
  • the service of the service unit is aborted, the user re-routes the VPDN to obtain the private network or the public network address.
  • the private network user performs the service processing on the remote LNS device, and the public network user forwards the route directly to the remote LNS device.
  • the backup protection control module is disposed in the CGN device.
  • the CGN backup method and device provided by the present invention can solve the problems encountered in the backup protection scenario of a single CGN device or multiple devices, and improve the reliability of the device.
  • FIG. 3 is a schematic flowchart of a CGN backup protection method according to a preferred embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step S302 The CGN device service unit has a service suspension or recovery
  • Step S304 Perform a backup protection forward or failback action according to a configuration mode of the deployment scenario.
  • FIGS. 4a-4c are schematic diagrams of a deployment scenario of a CGN device according to a preferred embodiment of the present invention, as shown in FIGS. 4a-4c, wherein, as shown in FIG. 4a, there is only one CGN device in scenario one, and multiple devices on a single device.
  • scenario 2 contains two CGN devices.
  • the private network tunnel mode, the private network label mode, and the private network user type switching mode also includes two CGN devices, wherein the two devices are deployed side by side,
  • the configuration is in the cold standby mode or the hot standby mode.
  • the cold standby mode is a combination of the preceding solutions.
  • the hot standby mode uses a private service backup protocol for service backup.
  • the implementation steps in scenario one include:
  • the default configuration is private network users, and the business unit is in cold standby mode.
  • the two service units of the location node 1SPU-0/1/0SPU-0/1/1 are in hot standby mode.
  • the private network user rollback flag is configured, the private network is rolled back to the public network mode, such as:
  • CGN1 and CGN2 are configured as the remote protection mode of the private network user by default.
  • the private network user is forwarded to the CGN2 for service processing.
  • the GRE tunnel is configured as the tunnel mode of the private network.
  • the user on the CGN1 obtains the private network address.
  • the tunnel label is invalid.
  • the intermediate device accesses the public network after the route is forwarded.
  • the tunnel tag is valid and encapsulated by the tunnel.
  • the private network user performs service processing on the remote centralized CGN2 device.
  • the processing of the tunnel tag can be performed by setting the tag directly in the tunnel module by matching the source address of the user, or by setting the priority of the tunnel route, or by setting the CGN and the tunnel mutual exclusion flag.
  • setting the tag directly in the tunnel module by matching the source address of the user, or by setting the priority of the tunnel route, or by setting the CGN and the tunnel mutual exclusion flag.
  • the route-map cgn is associated with the route-map, and specifies the next hop as the tunnel for the private network source address user.
  • configuration label mode is similar to the tunnel mode, and the execution process is similar, and details are not described herein again.
  • the private network user type switching mode is configured, and the user PPPoE is online to obtain the private network address.
  • the intermediate device routes to the public network.
  • the user goes offline and re-VPDN dials to obtain the private network.
  • the public network address the private network user performs the service processing on the remote LNS device, and the public network user directly routes and forwards the remote LNS device.
  • the default configuration is private network users, and the device is in cold standby mode.
  • Sib-peer-group 1 configures a private service information backup group and synchronizes information in real time.
  • Role master specifies the primary and backup relationship
  • the preferred embodiment of the present invention is divided into the following cases according to different granularities and application scenarios: private network users roll back public network user protection switching; private network user remote backup protection; private network user tunnel backup protection; private Network user label backup protection; private network user type switch backup protection.
  • the corresponding switchback is: the public network user retries the private network user; the private network user remote switch protection; the private network user tunnel protection; the private network user label protection; private Network user type back protection.
  • the method of the embodiment of the present invention adopts a service mode in which a service unit in a CGN device service fault is detected to be abnormal; a deployment scenario of the CGN device is determined; and a backup mode corresponding to the deployment scenario is adopted according to the determined deployment scenario. Make backup protection.
  • the solution that the cold standby or the hot standby is adopted in the prior art cannot solve the problem of more application scenarios, and improves the reliability and stability of the network.

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Abstract

本发明提供了一种运营商级网络地址转换CGN备份保护方法及装置，其中该方法包括：检测到CGN设备业务故障中的业务单元出现业务异常；确定CGN设备的部署场景；依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护。通过本发明解决了现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题，提高了网络的可靠性和稳定性。

Description

运营商级网络地址转换CGN备份保护方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种运营商级网络地址转换CGN备份保护方法及装置。
背景技术
运营商级网络地址转换(CGN，Carrier Grade NAT)是一种在运营商中部署的设备技术，为了解决目前的公网网络地址耗尽的问题，运营商级的设备具有高可靠性，有完善的备份保护机制，目前常用的备份保护主要分冷备和热备，冷备指的业务信息在切换到备用设备时重新生成，热备指的业务信息的实时备份，冷备目前采用双主控单元或双业务单元进行备份，采用的手段是设备的冗余备份，热备采用两个设备或业务单元进行备份，使用扩展的VRRP协议或私有的业务信息备份协议进行业务备份，现有技术中采用冷备或热备比较单一的方案无法满足更多的应用场景。
针对现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例的主要目的在于提供一种运营商级网络地址转换CGN备份保护方及装置，以解决现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题。
为了实现上述目的，根据本发明的一个方面，提供了一种运营商级网络地址转换CGN备份保护方法，包括：检测到CGN设备业务故障中的业务单元出现业务异常；确定所述CGN设备的部署场景；依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。
优选地，所述部署场景包括以下至少之一：一台所述CGN设备、两台所述CGN设备，其中一台侧挂部署、两台侧挂部署的所述CGN设备。
优选地，采用与所述部署场景对应的备份模式进行备份保护包括以下至少之一：在检测到所述CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用 户标签备份保护；私网用户类型切换备份保护；在检测到所述CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
优选地，依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护包括；当所述部署场景为一台所述CGN设备时，在所述CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退给公网用户保护切换；以及在所述CGN设备业务恢复的情况下，将所述公网用户回切给所述私网用户。
优选地，依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护包括：当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过隧道标记有效，并且通过所述隧道封装，所述私网用户在远端集中式所述CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述隧道标记无效，通过中间设备路由转发后访问公网地址；当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，所述私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过标签标记有效，并且通过所述标签封装，所述私网用户在远端集中式CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述标签标记无效，通过中间设备路由转发后访问公网地址；当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，在业务单元业务中止时，用户下线重新VPDN拨号获取所述私网或所述公网地址，所述私网用户在远端LNS设备做业务处理，所述公网用户在远端LNS设备直接路由转发；在所述CGN设备业务恢复的情况下，中间设备路由转发后访问公网。
根据本发明实施例的另一个方面，提供了一种运营商级网络地址转换CGN备份保护装置，包括：检测模块，设置为检测到CGN设备业务故障中的业务单元出现业务异常；确定模块，设置为确定所述CGN设备的部署场景；保护模块，设置为依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。
优选地，所述部署场景包括以下至少之一：一台所述CGN设备、两台所述CGN设备，其中一台侧挂部署、两台侧挂部署的所述CGN设备。
优选地，采用与所述部署场景对应的备份模式进行备份保护包括以下至少之一：在检测到所述CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用 户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护；在检测到所述CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
优选地，所述保护模块还设置为，当所述部署场景为一台所述CGN设备时，在所述CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退公网用户保护切换；以及用于在所述CGN设备业务恢复的情况下，将公网用户回切私网用户。
优选地，所述保护模块还设置为，当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过隧道标记有效，并且隧道封装，私网用户在远端集中式CGN设备做业务处理；在所述CGN设备业务恢复的情况下，隧道标记无效，中间设备路由转发后访问公网；当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过标签标记有效，并且标签封装，私网用户在远端集中式CGN设备做业务处理；在所述CGN设备业务恢复的情况下，标签标记无效，中间设备路由转发后访问公网；当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户类型备份切换及回切包括：在所述CGN设备业务异常的情况下，在业务单元业务中止时，PPPOE用户下线重新VPDN拨号获取私网或公网地址，私网用户在远端LNS设备做业务处理，公网用户在远端LNS设备直接路由转发；在所述CGN设备业务恢复的情况下，中间设备路由转发后访问公网。
通过本发明实施例的方法，采用检测到CGN设备业务故障中的业务单元出现业务异常；确定所述CGN设备的部署场景；依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。解决了现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题，提高了网络的可靠性和稳定性。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的运营商级网络地址转换CGN备份保护方法的流程图；
图2是根据本发明实施例的一种运营商级网络地址转换CGN备份保护装置的结构示意图；
图3是根据本发明优选实施例的CGN备份保护方法的流程示意图；
图4a～4c是根据本发明优选实施例的CGN设备的部署场景示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在本实施例中提供了一种运营商级网络地址转换CGN备份保护方法，图1是根据本发明实施例的运营商级网络地址转换CGN备份保护方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102：检测到CGN设备业务故障中的业务单元出现业务异常；
步骤S104：确定CGN设备的部署场景；
步骤S106：依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护。
通过本发明实施例，采用检测到CGN设备业务故障中的业务单元出现业务异常；确定CGN设备的部署场景；依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护。解决了现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题，提高了网络的可靠性和稳定性。
优选地，所述部署场景除了BRAS用户接入管理设备，还包括以下至少之一：一台所述CGN设备、两台所述CGN设备，其中一台侧挂部署、两台侧挂部署的所述CGN设备,其中CGN设备可以是融合式的，即包含BRAS的功能。
优选地，采用与部署场景对应的备份模式进行备份保护包括以下至少之一：在检测到CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护；在检测到CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
优选地，依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护包括；当部署场景为一台CGN设备时，在CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退公网用户保护切换；在CGN设备业务恢复的情况下，将公网用户回切私网用户。
优选地，依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护包括：当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户隧道备份切换及回切包括：在CGN设备业务异常的情况下，通过隧道标记有效，并且隧道封装，私网用户在远端集中式CGN设备做业务处理；在CGN设备业务恢复的情况下，隧道标记无效，中间设备路由转发后访问公网；当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户隧道备份切换及回切包括：在CGN设备业务异常的情况下，通过标签标记有效，并且标签封装，私网用户在远端集中式CGN设备做业务处理；在CGN设备业务恢复的情况下，标签标记无效，中间设备路由转发后访问公网；当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户隧道备份切换及回切包括：在CGN设备业务异常的情况下，在业务单元业务中止时，用户下线重新VPDN拨号获取私网或公网地址，私网用户在远端LNS设备做业务处理，公网用户在远端LNS设备直接路由转发；在CGN设备业务恢复的情况下，中间设备路由转发后访问公网。
在本实施例中还提供了一种运营商级网络地址转换CGN备份保护装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图2是根据本发明实施例的一种运营商级网络地址转换CGN备份保护装置的结构示意图，该装置包括：检测模块22，设置为检测到CGN设备业务故障中的业务单元出现业务异常；确定模块24与检测模块22耦合连接，设置为确定CGN设备的部署场景；保护模块26与确定模块24耦合连接，设置为依据确定的部署场景，采用与部署场景对应的备份模式进行备份保护。
优选地，部署场景包括以下至少之一：一台CGN设备、两台CGN设备，其中一台侧挂部署、两台侧挂部署的CGN设备。
优选地，采用与部署场景对应的备份模式进行备份保护包括以下至少之一：在检测到CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用户回退公 网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护；在检测到CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
优选地，保护模块还设置为，当部署场景为一台CGN设备时，在CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退公网用户保护切换；以及用于在CGN设备业务恢复的情况下，将公网用户回切私网用户。
优选地，保护模块还设置为，当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户隧道备份切换及回切包括：在CGN设备业务异常的情况下，通过隧道标记有效，并且隧道封装，私网用户在远端集中式CGN设备做业务处理；在CGN设备业务恢复的情况下，隧道标记无效，中间设备路由转发后访问公网；当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户隧道备份切换及回切包括：在CGN设备业务异常的情况下，通过标签标记有效，并且标签封装，私网用户在远端集中式CGN设备做业务处理；在CGN设备业务恢复的情况下，标签标记无效，中间设备路由转发后访问公网；当部署场景为两台CGN设备，其中一台为侧挂部署的CGN设备，私网用户类型备份切换及回切包括：在CGN设备业务异常的情况下，在业务单元业务中止时，用户下线重新VPDN拨号获取私网或公网地址，私网用户在远端LNS设备做业务处理，公网用户在远端LNS设备直接路由转发；在CGN设备业务恢复的情况下，中间设备路由转发后访问公网。
为了更好的对本发明进行说明，下面结合本发明优选实施例对本发明进行解释。
本发明优选实施例的主要目的在于提供一种CGN备份保护方法及装置，能够解决单个CGN设备或多个设备的备份保护场景遇到的问题，该方法提供了网络的高可靠性和稳定性，也提高了部署的灵活性，同时对终端用户透明。
为达到上述目的，本发明优选实施例采用了下述技术方案。
在CGN设备发生业务异常时的可靠性切换动作，切换动作有：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护。
业务恢复时，对应的回切动作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
私网用户和公网用户切换及回切；优选的实现方法为：用户上线检查业务单元状态，下发用户属性，业务单元可用时优先获取私有地址，在业务单元业务中止时，刷新用户属性，终端用户重新获取公网地址。
私网用户远端备份切换及回切；具体实现方法为：配置私网用户远端备份模式，用户上线获取私网地址，在业务单元业务中止时，不进行用户刷新等处理，私网用户在远端集中式CGN设备做业务处理。
优选地，私网用户隧道备份切换及回切；优选地实现方法为：配置私网用户隧道备份模式，用户上线获取私网地址，在业务单元业务正常时，隧道标记无效，通过中间设备路由转发后访问公网，在业务单元业务中止时，隧道标记有效，通过隧道封装，私网用户在远端集中式CGN设备做业务处理。
隧道标记的处理既可以通过匹配用户源地址直接在隧道模块设置标记，也可以通过设置隧道路由的优先级实现，还可以设置CGN和隧道互斥标记实现。
优选地，私网用户标签备份切换及回切；优选地实现方法为：配置私网用户标签备份模式，用户上线获取私网地址，在业务单元业务正常时，标签标记无效，中间设备路由转发后访问公网，在业务单元业务中止时，标签标记有效，通过标签封装，私网用户在远端集中式CGN设备做业务处理；标签标记的处理既可以通过匹配用户源地址直接在标签模块设置标记，也可以通过设置标签路由的优先级实现，还可以设置CGN和标签互斥标记实现。
优选地，私网用户类型备份切换及回切；优选地实现方法为：配置私网用户类型备份模式，用户PPPoE上线获取私网地址，在业务单元业务正常时，中间设备路由转发后访问公网，在业务单元业务中止时，用户下线重新VPDN拨号获取私网或公网地址，私网用户在远端LNS设备做业务处理，公网用户在远端LNS设备直接路由转发。
优选地，备份保护控制模块设置于CGN设备中。
本发明所提供的CGN备份方法及装置，能够解决单个CGN设备或多个设备的备份保护场景遇到的问题，提高设备的可靠性。
图3是根据本发明优选实施例的CGN备份保护方法的流程示意图，如图3所示，该包括以下步骤：
步骤S302：CGN设备业务单元出现业务中止或恢复；
其中，业务中止指的出现业务单元故障，公网地址池耗尽，管理员手动重启业务单元，管理员去使能业务开关等；
步骤S304：按照部署场景的配置模式执行备份保护正换或回切动作；
图4a～4c是根据本发明优选实施例的CGN设备的部署场景示意图，如图4a～4c所示，其中，如图4a所示，场景一中只有一台CGN设备，单个设备上有多个业务单元，可以配置业务单元为冷备或热备模式，也可以配置为私网用户回退公网用户模式；如图4b所示，场景二中包含两台CGN设备，设备间可以配置为私网远端模式，私网隧道模式，私网标签模式，私网用户类型切换模式；如图4c所示，场景三中也包含两台CGN设备，其中，该两台设备都侧挂部署，可以配置为设备间冷备或热备模式，冷备模式为前述方案的组合，热备模式采用私有的业务备份协议进行业务备份。
优选的，在场景一中的实施步骤包括：
首先，默认配置为私网用户，业务单元冷备模式；
其次，配置热备业务单元时为热备模式；如：
Location node 1SPU-0/1/0SPU-0/1/1两个业务单元为热备模式；
最后，配置私网用户回退标记时为私网回退公网模式，如：
cgn-check enable检查业务单元状态
private-to-public用户地址池属性
场景二实施步骤为：
首先，CGN1和CGN2默认配置为私网用户远端保护模式，CGN1业务中止时，通过识别私网用户转发至CGN2做业务处理；
其次，CGN1和CGN2配置GRE隧道为私网用户隧道模式，CGN1上用户上线获取私网地址，在业务单元业务正常时，隧道标记无效，中间设备路由转发后访问公网，在业务单元业务中止时，隧道标记有效，通过隧道封装，私网用户在远端集中式CGN2设备做业务处理。
隧道标记的处理既可以通过匹配用户源地址直接在隧道模块设置标记，也可以通过设置隧道路由的优先级实现，还可以设置CGN和隧道互斥标记实现。如：
cgn-check enable检查业务单元状态
route-map cgn关联route-map，对私网源地址用户指定下一跳为隧道。
需要说明的是，配置标签模式和隧道模式类似，其执行过程是相似的，在此不再赘述。
最后，配置私网用户类型切换模式，用户PPPoE上线获取私网地址，在业务单元业务正常时，中间设备路由转发后访问公网，在业务单元业务中止时，用户下线重新VPDN拨号获取私网或公网地址，私网用户在远端LNS设备做业务处理，公网用户在远端LNS设备直接路由转发。如：
cgn-check enable检查业务单元状态
private-or-public用户地址池属性
pppoe-to-vpdn enable pppoe用户切换vpdn用户
场景三实施关键步骤为：
首先，默认配置为私网用户，设备间冷备模式
首先，配置设备为热备模式，如：
sib-peer-group 1配置私有的业务信息备份组，实时同步信息
remote-ip 99.85.1.1 port 1025 local-ip 99.85.1.2 port 1025 port-count2$sib-instance1
role master指定主备关系
bind interface smartgroup1联动接口
bind bfd remote-ip 99.85.1.1local-ip 99.85.1.2time 5链路检测
bind sib-peer-group 1
通过本发明优选地实施例，按不同的粒度和应用场景分为如下的几种情况：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护。对应的回切有：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私 网用户类型回切保护。这些备份保护机制提供了网络的高可靠性和稳定性，也提高了部署的灵活性，同时对终端用户透明。
工业实用性
通过本发明实施例的方法，采用检测到CGN设备业务故障中的业务单元出现业务异常；确定所述CGN设备的部署场景；依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。解决了现有技术中采用冷备或热备比较单一的方案无法满足更多应用场景的问题，提高了网络的可靠性和稳定性。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种运营商级网络地址转换CGN备份保护方法，包括：
    检测到CGN设备业务故障中的业务单元出现业务异常；
    确定所述CGN设备的部署场景；
    依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。
  2. 根据权利要求1所述的方法，其中，所述部署场景包括以下至少之一：一台所述CGN设备、两台所述CGN设备，其中一台侧挂部署、两台侧挂部署的所述CGN设备。
  3. 根据权利要求1所述的方法，其中，采用与所述部署场景对应的备份模式进行备份保护包括以下至少之一：
    在检测到所述CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护；
    在检测到所述CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
  4. 根据权利要求2所述的方法，其中，依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护包括；
    当所述部署场景为一台所述CGN设备时，在所述CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退给公网用户保护切换；以及在所述CGN设备业务恢复的情况下，将所述公网用户回切给所述私网用户。
  5. 根据权利要求2所述的方法，其中，依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护包括：
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过隧道标记有效，并且通过所述隧道封装，所述私网用户在远端集中式 所述CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述隧道标记无效，通过中间设备路由转发后访问公网地址；
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，所述私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过标签标记有效，并且通过所述标签封装，所述私网用户在远端集中式CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述标签标记无效，通过中间设备路由转发后访问公网地址；
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，在业务单元业务中止时，用户下线重新VPDN拨号获取所述私网或所述公网地址，所述私网用户在远端LNS设备做业务处理，所述公网用户在远端LNS设备直接路由转发；在所述CGN设备业务恢复的情况下，中间设备路由转发后访问公网。
  6. 一种运营商级网络地址转换CGN备份保护装置，包括：
    检测模块，设置为检测到CGN设备业务故障中的业务单元出现业务异常；
    确定模块，设置为确定所述CGN设备的部署场景；
    保护模块，设置为依据确定的所述部署场景，采用与所述部署场景对应的备份模式进行备份保护。
  7. 根据权利要求6所述的装置，其中，所述部署场景包括以下至少之一：一台所述CGN设备、两台所述CGN设备，其中一台侧挂部署、两台侧挂部署的所述CGN设备。
  8. 根据权利要求6所述的装置，其中，采用与所述部署场景对应的备份模式进行备份保护包括以下至少之一：
    在检测到所述CGN设备业务异常的情况下，执行以下至少之一的切换操作：私网用户回退公网用户保护切换；私网用户远端备份保护；私网用户隧道备份保护；私网用户标签备份保护；私网用户类型切换备份保护；
    在检测到所述CGN设备业务恢复的情况下，执行以下至少之一的回切操作：公网用户回切私网用户；私网用户远端回切保护；私网用户隧道回切保护；私网用户标签回切保护；私网用户类型回切保护。
  9. 根据权利要求7所述的装置，其中，所述保护模块还设置为，
    当所述部署场景为一台所述CGN设备时，在所述CGN设备业务异常的情况下，通过刷新终端用户地址的方式获取公网地址后，将私网用户回退给公网用户保护切换；以及在所述CGN设备业务恢复的情况下，将所述公网用户回切给所述私网用户。
  10. 根据权利要求7所述的装置，其中，所述保护模块还设置为，
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过隧道标记有效，并且通过所述隧道封装，所述私网用户在远端集中式所述CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述隧道标记无效，通过中间设备路由转发后访问公网地址；
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，所述私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，通过标签标记有效，并且通过所述标签封装，所述私网用户在远端集中式CGN设备做业务处理；在所述CGN设备业务恢复的情况下，所述标签标记无效，通过中间设备路由转发后访问公网地址；
    当所述部署场景为两台所述CGN设备，其中一台为侧挂部署的所述CGN设备，私网用户隧道备份切换及回切包括：在所述CGN设备业务异常的情况下，在业务单元业务中止时，用户下线重新VPDN拨号获取所述私网或所述公网地址，所述私网用户在远端LNS设备做业务处理，所述公网用户在远端LNS设备直接路由转发；在所述CGN设备业务恢复的情况下，中间设备路由转发后访问公网地址。
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