WO2007062559A1 - Procede et passerelle de restitution de service au moment de la permutation entre passerelles pilote et asservie - Google Patents

Procede et passerelle de restitution de service au moment de la permutation entre passerelles pilote et asservie Download PDF

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Publication number
WO2007062559A1
WO2007062559A1 PCT/CN2006/002080 CN2006002080W WO2007062559A1 WO 2007062559 A1 WO2007062559 A1 WO 2007062559A1 CN 2006002080 W CN2006002080 W CN 2006002080W WO 2007062559 A1 WO2007062559 A1 WO 2007062559A1
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WO
WIPO (PCT)
Prior art keywords
gateway device
user equipment
bgp
module
vrrp
Prior art date
Application number
PCT/CN2006/002080
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English (en)
Chinese (zh)
Inventor
Yi Xiong
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to CN200680013610.9A priority Critical patent/CN100527716C/zh
Publication of WO2007062559A1 publication Critical patent/WO2007062559A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/56—Routing software
    • 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 method and a gateway device for service recovery after a state switch of an active and standby gateway device.
  • VRRP Virtual Router Redundancy Protocol
  • the user equipment is a Layer 3 device such as a router. It runs BGP with the VRJRP-enabled gateway device and exchanges routes with each other.
  • BGP Border Gateway Protocol
  • the user equipment removes the Border Gateway Protocol (BGP) established between the primary gateway device and the previous primary gateway device. Neighbor relationship, and then establish a BGP neighbor relationship with the new primary gateway device.
  • BGP Border Gateway Protocol
  • the gateway device does not use the VRRP function, and the BGP protocol connection is established between the user equipment and the dual gateway device by using the interface of the gateway device or the loopback address, and the user equipment uses the preferred technology selection of the BGP protocol itself.
  • a gateway device acts as a service uplink.
  • the user equipment uses the convergence technology of the BGP protocol to sense its fault and selects another gateway device as the service uplink.
  • the service is interrupted, and when the number of forwarding entries is large, the service is interrupted. The time is still long, and it is difficult to meet the requirements of users for network reliability.
  • the present invention provides a method for service recovery after the state switching of the active and standby gateway devices and a corresponding gateway device, and establishes a new primary gateway device and user setting without causing service interruption. Prepare a connection between the BGP protocol.
  • a method for service recovery after a state switch of an active/standby gateway device includes:
  • the gateway device uses the virtual redundant routing protocol VRRP virtual address as the source address of the BGP protocol.
  • the new primary gateway device After the primary and secondary state of the gateway device is switched, the new primary gateway device establishes a BGP connection with the user equipment by gracefully restarting the GR.
  • the gateway device includes a VRRP module and a BGP module, where the user equipment includes a BGP module, and the new primary gateway device establishes a BGP connection with the user equipment in the manner of the GR.
  • the VRRP module in the new primary gateway device notifies the gateway device state switching message to the BGP module of the new primary gateway device;
  • the BGP module of the new primary gateway device After receiving the gateway device state switching message, the BGP module of the new primary gateway device sends a BGP connection request packet to the BGP module of the user equipment;
  • the BGP module of the user equipment processes the received BGP connection request message in GR mode.
  • the sending, by the BGP module of the user equipment, the connection request message of the BGP protocol includes: the BGP module of the gateway device inserts a restart flag in the neighbor setup message, and initiates a protocol connection request with the user equipment.
  • the method further includes:
  • An IBGP protocol connection is established between the gateway devices.
  • the new primary gateway device and the previous primary gateway device have routes advertised by the user equipment.
  • the new primary gateway device establishes a BGP connection with the user equipment.
  • the new primary gateway device forwards the traffic coming back from the bearer network to the user equipment by using the route.
  • the new primary gateway device is established with the user equipment by using a GR manner.
  • the new primary gateway device re-learns from the user equipment the route that the previous primary gateway device points to the user equipment;
  • the new primary gateway device forwards the route to the previous primary network through the IBGP protocol.
  • the previous primary gateway device retains the received route and deletes the corresponding route learned directly from the user equipment according to the received route;
  • the new primary gateway device After the GR of the new primary gateway device and the user equipment ends, the new primary gateway device deletes all routes directed to the user equipment learned from the previous primary gateway device; and the new primary gateway device is used to the previous primary device.
  • the gateway device advertises that the GR ends, and the previous primary gateway device deletes all routes obtained directly from the user equipment.
  • the new active gateway device advertises the GR end to the previous active gateway device by extending the VRRP protocol packet.
  • the new primary gateway device establishes a BGP connection with the user equipment
  • the source port number different from the port number of the previous primary gateway device is used.
  • the method further includes: when the primary gateway device establishes a connection with the user equipment, the primary gateway device notifies the secondary gateway device of the source port number used by the user equipment to establish a BGP neighbor by extending the VRJ P protocol.
  • a gateway device includes a BGP module and a VRRP module; and further includes a VRRP switch sensing module and a handover notification module;
  • the switching notification module is configured to advertise a gateway device state switching message to the VRRP switching sensing module
  • the VRRP switch-aware module initiates a BGP connection request message to the BGP module of the user equipment according to the received gateway device state switching message, and initiates a process of establishing a BGP connection with the user equipment by using the graceful restart GR.
  • the switching notification module is embedded in the VRRP module.
  • the VRRP switch sensing module is embedded in the BGP module of the gateway device.
  • the VRRP switch sensing module puts a restart flag in the neighbor setup message, and initiates a protocol connection request with the user equipment.
  • the invention establishes a BGP protocol connection between the new primary gateway device and the user equipment by using the GR mode when the state of the active and standby gateway devices is switched, so as not to cause service interruption.
  • the slave can be resolved.
  • the problem that the traffic returned by the network is interrupted for a long time.
  • the service interruption time caused by the state transition of the gateway device can be effectively shortened.
  • the fault time of the end-to-end service can be made smaller than Ls, greatly better than the traditional technology of a dozen seconds, or even tens of seconds.
  • FIG. 1 is a schematic diagram of a basic networking scheme adopted by an embodiment of the present invention
  • Figure is a flow chart of an embodiment of the method of the present invention.
  • FIG. 3 is a schematic diagram of a system in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a basic networking scheme according to an embodiment of the present invention.
  • the gateway device 111 is the default primary gateway device, and the gateway device 112 is the backup gateway device.
  • the signaling of the gateway device is between the gateway device 111—the switch 112—the switch 122—the gateway device 121. Hosted on the link.
  • the virtual redundant routing VRRP protocol is run between the gateway devices 111 and 121; the gateway devices 111, 121 and the user equipment 130 are configured to gracefully restart the GR technology.
  • a connection of the BGP protocol is established between the user equipment 130 and the primary gateway device 111.
  • the gateway device 111 uses the VRRP virtual address as the source address of the BGP protocol connection; the user equipment 130 uses the VRRP virtual address as the destination address of the BGP protocol connection.
  • the gateway devices 111 and 121 are both provided with a VRRP module and a BGP module (not shown), and the user device 130 is provided with a BGP module (not shown).
  • the binding relationship between the VRRP protocol and the BGP protocol is configured on the gateway device (including the primary gateway device 111 and the backup gateway device 121).
  • the message exchange between the specified neighbor (the user equipment 130) and the state of the gateway device is affected by the protocol. Only the master gateway device 111 can receive and send the protocol report with the user equipment 130. The backup gateway device 121 neither receives nor sends protocol packets. Therefore, the primary gateway device 111 can establish a normal protocol neighbor relationship with the user equipment 130, and the backup gateway device 121 This kind of neighbor relationship cannot be established.
  • the protocol neighbor is the gateway device 111 or the gateway device 121
  • the neighbor address of the BGP protocol is the gateway address (VRRP virtual address), and accordingly, the next forwarding entry generated according to the BGP protocol.
  • the hop address is also the gateway address (VRRP virtual address).
  • the destination MAC address of the packet forwarded by the forwarding entry is the MAC address corresponding to the VRRP virtual address.
  • the VRRP protocol can only be received by the primary gateway device 111. Perform three-layer forwarding.
  • gateway device 121 that switches to the active state can establish a normal protocol neighbor relationship with the user equipment 130, and the gateway device 111 that switches to the standby state cannot establish such a neighbor. relationship.
  • the status switch of the active and standby gateway devices includes the following situations: A. When the gateway device 111 fails, the gateway device 121 detects that the gateway device 111 is faulty by VRRP signaling or other means, and switches to the primary gateway device; B. the gateway device 111 The priority between the gateway device 121 and the gateway device 121 is reversed, the gateway device 121 is configured to be in the preemptive mode, and the gateway device 121 actively switches to the primary gateway device. C. Modify the configuration of the gateway device 111 to leave the gateway backup group. After receiving the corresponding signaling message, the device actively switches to the primary gateway device.
  • the method for the service recovery after the state-switching of the active and standby gateways is enabled by the Graceful Restart (GR) mode to establish a new primary service without causing service interruption.
  • GR Graceful Restart
  • an embodiment of the method of the present invention includes:
  • Step 201 The state of the gateway device is switched.
  • the gateway device 111 is a previous primary gateway device, and after the gateway device status is switched, the gateway device 121 is upgraded to a new primary gateway device.
  • Step 202 The VRJ P module of the new primary gateway device notifies the BGP module of the new primary gateway device to switch state.
  • the VRJ P module reports the gateway device status switch message to the BGP module.
  • Step 203 The BGP module of the new primary gateway device initiates a BGP connection request packet to the BGP module of the user equipment.
  • the gateway device 121 is configured with the GR capability of the BGP.
  • the BGP module of the gateway device 121 understands the gateway device state switching message as a GR event, and initiates a protocol connection with the user equipment.
  • the BGP module is in the OPEN (neighbor establishment). ) Put a Restart flag in the message.
  • Step 204 The BGP module of the user equipment performs an elegant restart according to the received connection request message.
  • the gateway device 111 or the gateway device 121 is not distinguished from the packet
  • the gateway device 111 or the gateway device 121 is not distinguished from the packet
  • the user equipment 130 can trigger the GR capability of the user equipment 130, and the user equipment 130 can establish a protocol neighbor with the gateway device 121.
  • the established forwarding entries are not deleted, and the uplink service of the user equipment is not guaranteed. Interrupted.
  • an IBGP neighbor is established between the primary gateway device and the backup gateway device.
  • the primary gateway device is the gateway device 111 and the backup gateway device is the gateway device 121.
  • the gateway device 111 forwards the route learned from the user equipment 130 to the gateway device 121, and the next hop address is set to be unmodified, and still points to the user equipment 130, so that the gateway device 121 also has the route advertised by the user equipment 130. .
  • the gateway device 111 After the gateway device status is switched, the gateway device 111 does not immediately delete the route learned by the BGP neighbor established by the user equipment 130, and the gateway device 121 does not immediately delete the route from the gateway device 111 to the user equipment 130, and still uses the route.
  • the route forwards the traffic returned by the bearer network to the user equipment 130 to ensure that the service returned to the user equipment 130 is not interrupted.
  • the gateway device 121 re-learns the route to the user equipment 130.
  • the gateway device 121 preferably routes the information learned from the user equipment 130 and forwards it to the gateway device 111 through the IBGP neighbor.
  • the gateway device 111 prefers the route sent by the gateway device 121, and deletes the corresponding route learned from the user equipment 130 and the route sent by the foregoing gateway device 121.
  • the gateway device deletes all the routes from the gateway device 111 to the user equipment 130, and at the same time, by extending VRRP protocol packets or other protocol packets such as IBGP, the network is notified.
  • the gateway device 111 deletes all routes obtained directly from the user device 130. So far, all the routes to the user equipment 130 on the gateway device 121 are obtained directly from the BGP neighbors established with the user equipment 130, and all the routes to the user equipment 130 on the gateway device 111 are from the IBGP established with the gateway device 111. The neighbors learned. In this process, the gateway device 111 and the gateway device 121 do not actively delete the forwarding items that are directed to the user equipment 130, but use the technology of combining update and deletion, which effectively ensures that the traffic returned to the user equipment 130 is not due to the status of the gateway device. The switch was interrupted.
  • the primary gateway device can advertise the source port number used by the BGP neighbor established by the user equipment with the user equipment by extending the VR P protocol or other protocols such as IBGP, so that the standby gateway device becomes the new primary gateway. After the device establishes a BGP neighbor relationship with the user equipment, you can avoid using this port number as the source port number.
  • the gateway device provided by the present invention is provided with a handover notification module 311 and a VRRP handover awareness module 321 .
  • the switch notification module 311 can be embedded in the VRRP module 310 of the gateway device, and the VRRP switch perception module 321 can be embedded in the BGP module 320 of the gateway device.
  • the handover notification module 311 is configured to notify the VRRP handover awareness module 321 of the gateway device status switching message.
  • the VRRP switch sensing module 321 initiates a BGP connection request message to the BGP module 400 of the user equipment according to the received gateway device state switching message.
  • the VRRP switch sensing module 321 of the gateway device understands the gateway device state switching message as a GR event, and initiates a protocol connection with the user equipment. For example, put a Restart in the OPEN (Neighbor Establishment) message. mark.
  • the BGP module 400 of the user equipment performs graceful restart of the GR according to the received BGP protocol connection request message.

Abstract

Procédé et passerelle de restitution de service au moment de la permutation entre passerelle pilote et passerelle asservie. Ladite passerelle comprend un module VRRP encastrant un module de notification de commutation et un module BGP encastrant un module d'aperception de VRRP, le protocole VRRP fonctionnant entre lesdites passerelles pilote et asservie. La passerelle de restitution de service met en application l'adresse virtuelle VRRP en tant qu'adresse de source du protocole BGP au moment de sa connexion entre le dispositif utilisateur et ladite passerelle, et la nouvelle passerelle pilote établit une connexion de protocole BGP avec le dispositif utilisateur de type GR après la permutation des passerelles entre un état pilote et un état d'asservissement, de façon à pouvoir établir une connexion de protocole lisse entre le dispositif utilisateur et la nouvelle passerelle pilote. Ceci permet de raccourcir la durée d'interruption de service provoquée par la permutation des passerelles entre un état pilote et un état d'asservissement et d'améliorer la fiabilité du réseau.
PCT/CN2006/002080 2005-12-01 2006-08-16 Procede et passerelle de restitution de service au moment de la permutation entre passerelles pilote et asservie WO2007062559A1 (fr)

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CN200680013610.9A CN100527716C (zh) 2005-12-01 2006-08-16 主备网关设备状态切换后业务恢复的方法及网关设备

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CN200510102085.5 2005-12-01
CN 200510102085 CN1980224A (zh) 2005-12-01 2005-12-01 基于主备网关设备状态切换后业务恢复的方法及系统

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WO2011127665A1 (fr) * 2010-04-16 2011-10-20 华为技术有限公司 Procédé, système et dispositif correspondant pour mettre en œuvre une découverte rendue publique par protocole bgp (bgp-ad)
US8879392B2 (en) 2012-04-26 2014-11-04 Hewlett-Packard Development Company, L.P. BGP security update intercepts
CN106603272A (zh) * 2016-11-17 2017-04-26 上海斐讯数据通信技术有限公司 一种基于平滑重启的控制器保护方法和系统
CN106656791A (zh) * 2015-10-30 2017-05-10 华为技术有限公司 一种设备状态切换的方法、设备及系统
CN108430039A (zh) * 2017-01-20 2018-08-21 迈普通信技术股份有限公司 一种组播优化方法、组播设备及系统
CN109067546A (zh) * 2018-09-19 2018-12-21 杭州数梦工场科技有限公司 一种管理安全证书的方法、装置、设备及计算机存储介质
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WO2011127665A1 (fr) * 2010-04-16 2011-10-20 华为技术有限公司 Procédé, système et dispositif correspondant pour mettre en œuvre une découverte rendue publique par protocole bgp (bgp-ad)
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CN106656791A (zh) * 2015-10-30 2017-05-10 华为技术有限公司 一种设备状态切换的方法、设备及系统
CN106603272A (zh) * 2016-11-17 2017-04-26 上海斐讯数据通信技术有限公司 一种基于平滑重启的控制器保护方法和系统
CN108430039A (zh) * 2017-01-20 2018-08-21 迈普通信技术股份有限公司 一种组播优化方法、组播设备及系统
CN108430039B (zh) * 2017-01-20 2021-12-14 迈普通信技术股份有限公司 一种组播优化方法、组播设备及系统
CN109067546A (zh) * 2018-09-19 2018-12-21 杭州数梦工场科技有限公司 一种管理安全证书的方法、装置、设备及计算机存储介质
CN116112348A (zh) * 2023-04-12 2023-05-12 广州河东科技有限公司 一种智能网关的工作模式切换方法

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