WO2013029438A1 - 以太网接口保护方法及网络侧设备 - Google Patents
以太网接口保护方法及网络侧设备 Download PDFInfo
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- WO2013029438A1 WO2013029438A1 PCT/CN2012/078763 CN2012078763W WO2013029438A1 WO 2013029438 A1 WO2013029438 A1 WO 2013029438A1 CN 2012078763 W CN2012078763 W CN 2012078763W WO 2013029438 A1 WO2013029438 A1 WO 2013029438A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40045—Details regarding the feeding of energy to the node from the bus
-
- 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
- H04L45/24—Multipath
- H04L45/247—Multipath using M:N active or standby paths
-
- 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
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
Definitions
- the present invention relates to the field of communications technologies, and in particular, to an Ethernet interface protection method and a network side device.
- the service switching requirement is less than 50ms.
- the VPN FRR Virtual Private Network Fast Re-route
- the VPN FRR technology implements the process of: establishing end-to-end services between PEs (or CEs) and PEs (or CEs), and preconfiguring two end-to-end available routes, one for the primary route and the other for the backup. routing. If the detection mechanism is not configured, the triggering protocol converges after the main route is down. The protocol delivers the new backup route as the new primary route for traffic forwarding. The protocol calculation is generally difficult to meet the performance requirements.
- the route detection mechanism is used to detect the head node of the service when the route or node on the primary route fails. The head node imports the service traffic into the backup route and calculates a new path in the protocol. It is then replaced to achieve route protection and fast switching.
- the routing fault mentioned here also includes the direct route between PE3 and CE2. From the detection of the detected packet to the triggering of the node to the service, the route between PE1 and CE2 is the most. The impact on the transmission time of the packet is undoubtedly higher than that of other nodes or routes. . Summary of the invention
- the embodiment of the present invention provides an Ethernet interface protection method and a network side device, so as to reduce d and detect the time cost of the packet, thereby reducing packet loss time, and improving scalability and compatibility.
- the network side device acquires the backup route of the protected interface, establishes the protected interface and the active/standby relationship entry of the backup route, and establishes the fast reroute FRR group information according to the active/standby relationship entry;
- the FRR group information includes: FRR index information, interface information of the protected interface, and forwarding entry information corresponding to the FRR backup route.
- the step of obtaining the backup route of the protected interface by the network side device includes: specifying a backup route of the protected interface by using the operation management and maintenance OAM command, or generating a backup route of the protected interface by using a protocol.
- the direct route forwarding entry information includes: network segment routing information where the interface address is located, and all address resolution protocol forwarding entry information belonging to the network segment.
- the step of establishing an association relationship between the FRR indexes of the directly connected routes to the FRR group information includes: writing the FRR index information, the FRR active and standby status information, and the direct routing forwarding entry information into the hardware forwarding table, where the FRR active and standby
- the status information includes: Status information of whether the FRR current traffic is on the primary route or the backup route.
- the method further includes:
- the software information of the FRR group information includes: index information of the protected interface and FRR index information.
- the method further includes:
- the FRR active/standby relationship is triggered by the configuration or protocol
- the implementation of the present invention further provides a network side device, including:
- a protection group information establishing unit configured to acquire a backup route of the protected interface, establish an active/standby relationship entry of the protected interface and the backup route, and establish a fast rerouting FRR group information according to the active/standby relationship entry;
- the routing association unit is configured to: determine, according to the FRR group information, whether there is a direct routing forwarding entry information on the protected interface, and if yes, find all the protected interfaces by using the index information of the protected interface of the FRR group information. Directly routing the forwarding entry information, establishing an association relationship between the FRR index of the direct route to the FRR group information; if not, the forwarding entry information corresponding to the FRR backup route and the direct route forwarding entry information are written
- the hardware forwarding table where the FRR group information includes: FRR index information, interface information of the protected interface, and forwarding entry information corresponding to the FRR backup route.
- the protection group information establishing unit is configured to specify a backup route of the protected interface by using an operation management and maintenance OAM command, or generate a backup route of the protected interface by using a protocol.
- the direct route forwarding entry information includes: network segment routing information where the interface address is located, and all address resolution protocol forwarding entry information belonging to the network segment.
- the route association unit is configured to establish an association relationship between the FRR indexes of the direct route to the FRR group information by: writing the FRR index information, the FRR active/standby state information, and the direct route forwarding entry information into the hardware forwarding table.
- the FRR active/standby status information includes: FRR current traffic is status information of the primary route or the backup route.
- the network side device further includes an active/standby state switching unit, configured to: establish software information of the FRR group information, and save the software information of the FRR group information in a software table, when the insured When the protection interface is faulty, the software table is searched for the FRR index information by using the index information of the protected interface, and the active/standby state in the hardware forwarding table is modified according to the FRR index information.
- an active/standby state switching unit configured to: establish software information of the FRR group information, and save the software information of the FRR group information in a software table, when the insured When the protection interface is faulty, the software table is searched for the FRR index information by using the index information of the protected interface, and the active/standby state in the hardware forwarding table is modified according to the FRR index information.
- the software information of the FRR group information includes: index information of the protected interface and FRR index information.
- the network side device further includes an index recovery unit, configured to: trigger an operation of releasing the FRR active/standby relationship by using a configuration or a protocol, recover the FRR index information according to the operation, delete the hardware forwarding table, and release the straight The association between the FRR indexes that are routed to the FRR group information.
- an index recovery unit configured to: trigger an operation of releasing the FRR active/standby relationship by using a configuration or a protocol, recover the FRR index information according to the operation, delete the hardware forwarding table, and release the straight The association between the FRR indexes that are routed to the FRR group information.
- the technical solution of the present invention has the following beneficial effects: In the case of a route failure, only the traffic switching of a single protection group of the faulty node can protect the normal operation of all service traffic with the interface as the outgoing interface, and reduce the jump span.
- the time limit of the detection packet is transmitted across multiple devices.
- the traffic switching mechanism of the multi-to-one mapping (all the direct routes of the protected interface correspond to the same FRR group) is used to switch traffic at the faulty node.
- the time overhead of the text reduces the packet loss time and improves the performance of the network side device.
- the detection only needs to be completed on a single node without the support of the docking device, which improves the scalability and compatibility of the network side device.
- FIG. 1 is a network architecture diagram provided by related art
- FIG. 3 is another flowchart of a method according to an embodiment of the present invention.
- FIG. 4 is still another flowchart of a method according to an embodiment of the present invention.
- FIG. 5 is a flowchart of an application example of a method according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of a network side device according to an embodiment of the present disclosure.
- FIG. 7 is another schematic structural diagram of a network side device according to an embodiment of the present disclosure.
- FIG. 8 is still another schematic structural diagram of a network side device according to an embodiment of the present invention. Preferred embodiment of the invention
- the embodiment of the invention provides a method for protecting an Ethernet interface. As shown in FIG. 2, the method includes the following steps:
- the network side device acquires a backup route of the protected interface.
- the network side device specifies a backup route of the protected interface through an operation management and maintenance (OAM) command, or generates a backup route of the protected interface by using a protocol.
- OAM operation management and maintenance
- the FRR group information is established according to the active/standby relationship, where the FRR group information includes: FRR index information, interface information of the protected interface, and forwarding entry information corresponding to the FRR backup route, the FRR The group information is also the FRR active and standby forwarding information.
- the forwarding entry information corresponding to the FRR backup route includes: MAC (Media Access Control, Media Access Control), PORT (port), next hop IP, and the like;
- the FRR index information is an FRR identifier that is allocated after the backup route of the protected interface is configured.
- the FRR index information is used to indicate the mapping between the protected interface and the protected route.
- the FRR index information is allocated by calling the FRR index resource management interface, and in the distributed system (the network side device includes the master device and the line card, wherein the master device and the line card are separate), the main The control device also forwards the FRR index and the FRR group information identified by the FRR index to each line card synchronously.
- the line card After receiving the FRR group information sent by the master device, the line card determines whether the FRR information needs to be driven. If yes, the FRR group information is written into the hardware table, and if not, the driver does not drive.
- the information of the FRR group may be sent to each line card before being sent by the direct route corresponding to the protected interface, or may be delivered to the line card after the direct route is delivered.
- steps S110, S120, and SI30 are performed by the master device, and steps S140, S150, S160, S170, and S180 are all performed by the line card.
- steps S140, S150, S160, S170, and S180 are all performed by the line card.
- all steps in the method are performed by the network side device.
- S140. Determine, according to the FRR group information, whether there is direct route entry forwarding information on the protected interface; if yes, execute step S150, if no, perform step S160.
- the forwarding information of the direct routing entry includes: the routing information of the network segment where the interface address is located, and the forwarding entry information of all ARP (Address Resolution Protocol) belonging to the network segment.
- ARP Address Resolution Protocol
- the interface information of the protected interface of the FRR group information is used to find the direct route forwarding information of the protected interface, and the association relationship between the direct route and the FRR index of the FRR group information is established.
- the direct route of the protected interface and the FRR index resource management interface are invoked, and all direct route entry forwarding information is obtained through the FRR primary route information, and the direct route entry forwarding information of the protected interface is established between the FRR index and the FRR index.
- the association relationship is more specific. The association relationship is established by: writing the FRR index information, the FRR active/standby state information, and the direct route forwarding information into the hardware forwarding table.
- the FRR active/standby status information includes: Status information of whether the FRR current traffic is in the primary route or the backup route, and is generally the primary route.
- the backup board also needs to maintain the correspondence table between the FRR index and the FRR group information.
- the method provided by the embodiment of the present invention can protect the normal operation of all the service traffic of the outbound interface by using the traffic switching of the single protection group of the faulty node in the case of a route fault, and reduce the detection of the multi-device in the case of skipping multiple devices.
- the traffic switching mechanism of the multi-to-one mapping (the same FRR group on the protected interface corresponds to the same FRR group) switches traffic on the faulty node and reduces the time cost of detecting packets. Thereby reducing the packet loss time and improving the performance of the network side device.
- the method further includes: following the protection process flow switching process provided by the foregoing embodiment, as shown in FIG. 3, the process includes the following steps:
- the fault detection mechanism detects that all the physical ports of the members of the protected interface are faulty. More specifically, the software information of the FRR group information includes: index information of the protected interface and FRR index information.
- the method further includes an FRR index recovery process, and the FRR index recovery process is used to cancel the FRR master/slave relationship to save the routing table hardware resources.
- the FRR index recovery process includes the following steps:
- S190 The operation of canceling the FRR active/standby relationship by using a configuration or a protocol
- S200 retrieve the FRR index information according to the operation, delete the FRR hardware forwarding table, and release the association relationship between the direct routing route and the FRR index of the FRR group information. (ie delete the FRR index information in the hardware forwarding table).
- the operation of the FRR index recovery is triggered by the master device through configuration or protocol, and then the master device recovers the FRR index information, and forwards the message to the line card synchronously. .
- the line card deletes the FRR hardware forwarding table, and removes the association relationship between the direct routing route and the FRR index of the FRR group information.
- the forwarding process includes:
- the line card receives the message.
- step S504 Obtaining the active/standby status information in the hardware forwarding table. If the primary route is valid, step S505 is performed, and the backup route is valid, step S506 is performed;
- S505 Obtain encapsulation information of the primary routing packet.
- the embodiment of the present invention further provides a network side device, where the network side device is used to implement the method provided by the foregoing embodiments.
- the network side device includes:
- a protection group information establishing unit 510 configured to acquire a backup route of the protected interface, establish an active/standby relationship entry of the protected interface and the backup route, and establish FRR group information according to the active/standby relationship entry;
- the protection group information establishing unit 510 is configured to specify a backup route of the protected interface by using an OAM command, or generate a backup route of the protected interface by using a protocol.
- the routing association unit 520 is configured to determine, according to the FRR group information, whether there is direct routing entry forwarding information on the protected interface, and if yes, find all the protected interfaces by using the index information of the protected interface of the FRR group information.
- the direct route routing information is used to establish an association relationship between the FRR index of the direct route to the FRR group information; if not, the forwarding entry information corresponding to the FRR backup route and the direct route entry forwarding information are written into the hardware switch.
- the information of the FRR group includes: FRR index information, interface information of the protected interface, and forwarding entry information corresponding to the FRR backup route.
- the direct routing entry forwarding information includes: network segment routing information where the interface address is located and all address resolution protocol forwarding entry information belonging to the network segment.
- the routing association unit establishes an association relationship between the FRR indexes of the direct route to the FRR group information: the FRR index information, the FRR active/standby state information, and the direct route forwarding information are written into the hardware.
- the FRR active/standby status information includes: status information of whether the FRR current traffic is in a primary route or a backup route.
- the network side device provided by the embodiment of the present invention may be a CE, a PE, or the like.
- a route fault only the traffic switching of a single protection group of the faulty node can protect the normal operation of all service traffic with the interface as the outgoing interface, and reduce The time limit for detecting packet hops across multiple devices in the case of hopping across multiple devices, through a many-to-one mapping (all directly connected routes on the protected interface correspond to the same FRR)
- the traffic switching mechanism of the group switches the traffic at the faulty node, reduces the time cost of detecting packets, thereby reducing the packet loss time and improving the performance of the network side device.
- the network side device further includes: an active/standby state switching unit 530, configured to establish software information of the FRR group information, and set the FRR group
- the software information of the information is stored in the software table.
- the index information of the protected interface is used to search the software table to obtain the FRR index information, and the FRR index information is used according to the FRR index information.
- the active and standby states in the hardware forwarding table are modified.
- the software information of the FRR group information includes: index information of the protected interface and FRR index information.
- the network side device further includes: an index recovery unit 540, configured to trigger an operation of releasing the FRR active/standby relationship by using a configuration or a protocol, according to the operation. Retrieving the FRR index information, deleting the FRR hardware forwarding table, and releasing the association relationship between the direct routing route and the FRR index of the FRR group information. To save routing table hardware resources.
- an index recovery unit 540 configured to trigger an operation of releasing the FRR active/standby relationship by using a configuration or a protocol, according to the operation. Retrieving the FRR index information, deleting the FRR hardware forwarding table, and releasing the association relationship between the direct routing route and the FRR index of the FRR group information. To save routing table hardware resources.
- the traffic switching of a single protection group of the faulty node can protect the normal operation of all the service traffic of the outbound interface, and reduce the jump of the detection packets when the device is skipped across multiple devices.
- the time limit of the device transmission The traffic switching mechanism of the multi-to-one mapping (the same FRR group on the protected interface corresponds to the same FRR group) switches traffic on the faulty node, reducing the time cost of detecting packets, thus reducing packet loss. Time, improve the performance of the network side device. And the detection only needs to be completed on a single node without the support of the docking device, which improves the scalability and compatibility of the network side device.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12829031.9A EP2738985B1 (en) | 2011-08-30 | 2012-07-17 | Ethernet interface protection method and network side device |
RU2014111289/08A RU2571729C2 (ru) | 2011-08-30 | 2012-07-17 | Способ защиты интерфейса ethernet и устройство сетевой стороны |
BR112014004730A BR112014004730A2 (pt) | 2011-08-30 | 2012-07-17 | método de proteção de interface de ethernet e dispositivo de lado de rede |
Applications Claiming Priority (2)
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CN201110253131.7 | 2011-08-30 | ||
CN201110253131.7A CN102291311B (zh) | 2011-08-30 | 2011-08-30 | 以太网接口保护方法及网络侧设备 |
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WO2013029438A1 true WO2013029438A1 (zh) | 2013-03-07 |
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PCT/CN2012/078763 WO2013029438A1 (zh) | 2011-08-30 | 2012-07-17 | 以太网接口保护方法及网络侧设备 |
Country Status (5)
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EP (1) | EP2738985B1 (zh) |
CN (1) | CN102291311B (zh) |
BR (1) | BR112014004730A2 (zh) |
RU (1) | RU2571729C2 (zh) |
WO (1) | WO2013029438A1 (zh) |
Families Citing this family (8)
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CN102291311B (zh) * | 2011-08-30 | 2017-03-29 | 中兴通讯股份有限公司 | 以太网接口保护方法及网络侧设备 |
CN102611618B (zh) * | 2012-02-23 | 2015-06-03 | 中兴通讯股份有限公司 | 路由保护切换方法及装置 |
CN102664788B (zh) * | 2012-04-05 | 2015-07-22 | 中兴通讯股份有限公司 | Mpls l3vpn中ce双归链路保护的方法及系统 |
CN105591917B (zh) * | 2015-08-11 | 2018-12-11 | 新华三技术有限公司 | 一种多链接透明互联网络中的报文转发方法和装置 |
CN107592260B (zh) * | 2017-09-22 | 2020-07-07 | 烽火通信科技股份有限公司 | 基于快速重路由的vpws bypass保护倒换方法及系统 |
CN108337161B (zh) * | 2017-12-18 | 2020-11-24 | 中国电子科技集团公司第三十二研究所 | 一种mlag接口故障三层数据流量平滑切换的方法 |
CN110430131B (zh) * | 2019-07-25 | 2021-12-24 | 新华三技术有限公司合肥分公司 | 一种报文转发方法及装置 |
CN112737949B (zh) * | 2019-10-14 | 2023-06-30 | 中兴通讯股份有限公司 | 故障检测方法及装置、电子设备、计算机可读介质 |
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CN101442494A (zh) * | 2008-12-16 | 2009-05-27 | 中兴通讯股份有限公司 | 一种实现快速重路由的方法 |
CN101562575A (zh) * | 2009-06-04 | 2009-10-21 | 杭州华三通信技术有限公司 | Mpls te frr快速切换的方法和装置 |
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CN102291311A (zh) * | 2011-08-30 | 2011-12-21 | 中兴通讯股份有限公司 | 以太网接口保护方法及网络侧设备 |
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US7821930B2 (en) * | 2005-09-12 | 2010-10-26 | Microsoft Corporation | Fault-tolerant communications in routed networks |
US7852751B2 (en) * | 2008-02-15 | 2010-12-14 | Cisco Technology, Inc. | Constructing repair paths around multiple non-available links in a data communications network |
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2011
- 2011-08-30 CN CN201110253131.7A patent/CN102291311B/zh active Active
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2012
- 2012-07-17 EP EP12829031.9A patent/EP2738985B1/en active Active
- 2012-07-17 BR BR112014004730A patent/BR112014004730A2/pt not_active Application Discontinuation
- 2012-07-17 RU RU2014111289/08A patent/RU2571729C2/ru active
- 2012-07-17 WO PCT/CN2012/078763 patent/WO2013029438A1/zh active Application Filing
Patent Citations (4)
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CN101442494A (zh) * | 2008-12-16 | 2009-05-27 | 中兴通讯股份有限公司 | 一种实现快速重路由的方法 |
CN101562575A (zh) * | 2009-06-04 | 2009-10-21 | 杭州华三通信技术有限公司 | Mpls te frr快速切换的方法和装置 |
CN101860482A (zh) * | 2010-05-25 | 2010-10-13 | 中兴通讯股份有限公司 | 二层虚拟专用网络快速重路由方法及装置 |
CN102291311A (zh) * | 2011-08-30 | 2011-12-21 | 中兴通讯股份有限公司 | 以太网接口保护方法及网络侧设备 |
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Also Published As
Publication number | Publication date |
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EP2738985A1 (en) | 2014-06-04 |
RU2014111289A (ru) | 2015-10-27 |
EP2738985A4 (en) | 2014-09-17 |
EP2738985B1 (en) | 2016-04-06 |
CN102291311B (zh) | 2017-03-29 |
RU2571729C2 (ru) | 2015-12-20 |
BR112014004730A2 (pt) | 2017-06-13 |
CN102291311A (zh) | 2011-12-21 |
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