WO2016034127A1 - Système et procédé d'obtention de pseudo-fil d'interconnexion à double nœud - Google Patents

Système et procédé d'obtention de pseudo-fil d'interconnexion à double nœud Download PDF

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Publication number
WO2016034127A1
WO2016034127A1 PCT/CN2015/088845 CN2015088845W WO2016034127A1 WO 2016034127 A1 WO2016034127 A1 WO 2016034127A1 CN 2015088845 W CN2015088845 W CN 2015088845W WO 2016034127 A1 WO2016034127 A1 WO 2016034127A1
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WO
WIPO (PCT)
Prior art keywords
node
interface
pseudowire
standby
bridge
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PCT/CN2015/088845
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English (en)
Chinese (zh)
Inventor
张磊
黄祥国
刘涛
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烽火通信科技股份有限公司
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Publication of WO2016034127A1 publication Critical patent/WO2016034127A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • 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
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3
    • 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
    • H04L45/22—Alternate routing
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]

Definitions

  • the present invention relates to the field of wireless backhaul network application technologies, and in particular to a system and method for implementing a two-node interconnected pseudowire.
  • the common service model is to deploy the L2 network (Layer 2 network) for the access layer, the L3 network (Layer 3 network) for the core layer, and the L2 network to the L3 for the aggregation node through the bridge interface.
  • L2 network Layer 2 network
  • L3 network Layer 3 network
  • the L2 network is a switching network, and the peer-to-peer pseudowire technology is used to implement the peer-to-peer communication pipeline.
  • PW Pulseudo Wire
  • LSP Label Switched Path, label switching path
  • the L3 network is an IP forwarding network that forwards traffic through routing.
  • the protection function of the L3 network service is implemented through technologies such as VPN FRR (Virtual Private Network Fast Reroute).
  • the bridge node is provided with a plurality of interface boards, and the interface board is provided with a virtual bridge.
  • the virtual bridge includes three interfaces, namely, an L2VE1 interface, an L3VE1 interface, and an L2VE0. interface.
  • the L2VE1 interface corresponds to the access side interface
  • the L3VE1 interface corresponds to the core side interface
  • the L2VE0 interface corresponds to the dual node interconnected pseudowire side interface; wherein the L2VE1 interface and the L3VE1 interface are a default.
  • the bridging group is used to complete the bridging of the L2 network service interface and the L3 network service interface.
  • the L2VE0 interface is an interface of the two-node interconnected pseudowire side, which is used to bridge the L2 network service interface and the L3 network service interface.
  • the default path of the virtual bridge on the active node is: in the uplink direction, sent by the L2VE1 interface to the L3VE1 interface, or sent by the L2VE0 interface to the L3VE1 interface; in the downlink direction, it is determined by the L2VE1 according to the service type.
  • the interface or the L2VE0 interface forwards.
  • the default path of the virtual bridge on the standby node is: in the uplink direction, sent by the L2VE1 interface to the L2VE0 interface or sent by the L2VE0 interface to the L3VE1 interface; when switching, the L2VE1 interface is sent to the L3VE1 interface; Direction, forwarded by the L2VE1 interface.
  • the present invention also provides a method for implementing a two-node interconnected pseudowire, which includes the following steps: setting a default working path of the active node from the access side interface to the core side interface, and the default working path of the standby node is the access side interface.
  • the access side node and the standby node complete the access side protocol information exchange through the pseudowire automatic protection switching; the primary node and the standby node automatically protect the switching information through the pseudowire, and complete the interaction between the active and standby nodes.
  • the interaction of the state information; the state machine of the active node completes the bridge switching of the bridge node according to the automatic protection switching message sent by the standby node and the link state of the active node and the access side.
  • a transport layer OAM is initiated between the access side node and the active node to detect a communication state of the virtual circuit link between the access side node and the active node; in the primary node and the standby node The communication state of the virtual circuit link between the active node and the standby node is detected through the transport layer OAM.
  • the ARP hot standby function is configured on the bridge node, that is, the ARP address learned by the active node is synchronized to the ARP entry of the standby node;
  • the active node fails, the downlink service reaches the standby node, and then the ARP entry information synchronized on the standby node is used to forward the service.
  • the invention only deploys PW redundancy protection at the access layer, and does not need to perform overlay of LSP1:1 protection, which simplifies the protection model in the L2 network and improves the stability and reliability of the protection function.
  • the present invention can effectively connect the L2 network and the L3 network by setting up a virtual bridge and configuring the primary and backup nodes for the virtual bridge, thereby improving the survivability of the service in the entire network.
  • the method adopted by the present invention through the L2VE1 interface and the bridge group associated with the L3VE1 interface, the function is simple and effective, and the specific implementation method is isolated for the user. In the process of smooth system upgrade, the user can be perceived less. Significantly improve its performance.
  • FIG. 1 is a topological structural diagram of a system for implementing a two-node interconnected pseudowire in an embodiment of the present invention
  • FIG. 2 is a simplified model diagram of a bridge node in an embodiment of the present invention.
  • FIG. 3 is a virtual model diagram of three interfaces on a bridge node in an embodiment of the present invention.
  • a system for implementing a DNI-PW includes two bridge nodes, at least one access side node, and at least one core side node, where Ingress side node and core side node The number varies arbitrarily with the size of the network.
  • the two bridge nodes are respectively connected to each access side node and each core side node, and the two bridge nodes are divided into a primary node and a standby node, and the primary node and the standby node are connected.
  • Inbound interface 1 dual node interconnected pseudowire side interface 3 and core side interface 2, and any two interfaces on the same bridge node communicate with each other; a dual node interconnected pseudowire side is provided between the active node and the standby node VC (Virtual Circuit), an access side virtual circuit is provided between the access side node and the active node and the standby node, and the virtual circuit of the two-node interconnected pseudowire side is bound to the virtual circuit of the access side.
  • the APS Auto Protect Switch
  • the bridge node is provided with a plurality of interface boards, and the interface board is provided with a virtual bridge, and the virtual bridge is used to convert the L2 network to the L3 network, and the service is also performed on the virtual bridge. Forwarding action behavior, each virtual bridge is unique on the bridge node, globally valid and does not depend on a specific board.
  • the virtual bridge includes three interfaces, namely, an L2VE1 interface, an L3VE1 interface, and an L2VE0 interface.
  • the L2VE1 interface corresponds to the access side interface 1
  • the L3VE1 interface corresponds to the core side interface 2
  • the L2VE0 interface corresponds to the dual node interconnected pseudowire side interface 3.
  • the L2VE1 interface and the L3VE1 interface are a default bridging group. It is used to complete the bridging of the L2 network service interface and the L3 network service interface.
  • the L2VE0 interface is an interface on the side of the two-node interconnected pseudowire to complete the bridging of the L2 network service interface and the L2 network service interface.
  • the L2VE1 interface and the access-side node are used to quickly detect the link communication status through OAM (Operation Administration and Maintenance).
  • OAM Operaation Administration and Maintenance
  • the interface on the associated active node is activated, and the L3VE1 interface is pointed to L2VE0. interface.
  • the L2VE1 interface is bound to at least one logical sub-interface, and the L3VE1 interface is terminated. All the logical sub-interfaces on the L2VE1 interface are configured as a termination sub-interface. In the bridging group of the L2VE1 interface and the L3VE1 interface, the services of all the interfaces on the L2VE1 interface are forwarded to the L3VE1 interface.
  • the PW bound to a logical sub-interface on the L2VE1 interface fails, the downlink switching of the L3VE1 interface only performs the switching action for the invalid logical sub-interface under the L2VE1 interface.
  • the default path of the virtual bridge on the active node is: in the uplink direction, it is sent to the L3VE1 interface by the L2VE1 interface or sent to the L3VE1 interface by the L2VE0 interface. In the downlink direction, it is forwarded by the L2VE1 interface or the L2VE0 interface according to the service type.
  • the default path of the virtual bridge on the standby node is: in the uplink direction, sent by the L2VE1 interface to the L2VE0 interface or sent by the L2VE0 interface to the L3VE1 interface; when switching, it is sent to the L3VE1 interface by the L2VE1 interface; in the downlink direction, it is forwarded by the L2VE1 interface.
  • a method for implementing a two-node interconnected pseudowire based on the above system includes the following steps:
  • the default working path of the active node is the access side interface 1 to the core side interface 2.
  • the default working path of the standby node is the access side interface 1 to the core side interface 2.
  • the access side protocol information exchange is performed between the access node and the standby node through the PW APS (Pseudo Wire Auto Protect Switch).
  • PW APS Pulseudo Wire Auto Protect Switch
  • the active node and the standby node automatically protect the switching information through the pseudowire. Complete the interaction of status information between the active and standby nodes.
  • TP OAM Transport Operation Administration Maintenance
  • the access side node and the active node to detect the communication state of the virtual circuit link between the access side node and the active node;
  • the communication state of the virtual circuit link between the active node and the standby node is detected between the standby nodes through the transport layer OAM.
  • the state machine of the active node completes the bridging of the bridge node according to the automatic protection switching message sent by the standby node and the link state of the active node and the access side. Switched.
  • the ARP (Address Resolution Protocol) hot standby function is configured on the bridge node, that is, the ARP address learned by the active node is synchronized to the ARP entry of the standby node; when the active node fails, the downlink is performed.
  • the service is forwarded by searching for the ARP entry information synchronized on the standby node. Specifically, the service that is downlinked from the L3VE1 interface is forwarded through the corresponding logical sub-interface through the ARP entry information.
  • the ARP address learning process is triggered on the L3VE1 interface.
  • the ARP request packet is sent to the downstream node.
  • the ARP response packet is received, the ARP entry information is learned.
  • each bridge node When two bridge nodes are respectively connected to multiple access side nodes and multiple core side nodes, the two bridge nodes are respectively connected to each access side node and each core side node, and each access side is An access side virtual circuit is respectively disposed between the node and the active node and the standby node.

Abstract

La présente invention concerne un système et un procédé d'obtention de pseudo-fil d'interconnexion à double nœud, se rapportant au domaine technique des applications de réseau de liaison terrestre sans fil; le système comprend deux nœuds en pont, au moins un nœud côté accès et au moins un nœud côté noyau; les deux nœuds en pont sont respectivement connectés à chaque nœud côté accès et à chaque nœud côté noyau; les deux nœuds en pont sont divisés en un nœud maître et un nœud de secours, le nœud maître et le nœud de secours étant tous deux dotés d'une interface côté accès, d'une interface côté pseudo-fil d'interconnexion à double nœud et d'une interface côté noyau, deux interfaces quelconques d'un nœud en pont étant interconnectées; un circuit virtuel côté pseudo-fil d'interconnexion à double nœud est prévu entre le nœud maître et le nœud de secours; un circuit virtuel côté accès est respectivement prévu entre le nœud côté accès et le nœud maître et entre le nœud côté accès et le nœud de secours; le circuit virtuel côté pseudo-fil d'interconnexion à double nœud et le circuit virtuel côté accès sont liés en un groupe de pseudo-fils d'interconnexion à double nœud; et un canal de signalisation de commutation automatique de protection est superposé respectivement sur le circuit virtuel de pseudo-fil d'interconnexion à double nœud et sur le circuit virtuel côté accès.
PCT/CN2015/088845 2014-09-05 2015-09-02 Système et procédé d'obtention de pseudo-fil d'interconnexion à double nœud WO2016034127A1 (fr)

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CN201410452728.8A CN104270231B (zh) 2014-09-05 2014-09-05 一种实现双节点互联伪线的系统及方法
CN201410452728.8 2014-09-05

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CN104270231B (zh) * 2014-09-05 2018-02-16 烽火通信科技股份有限公司 一种实现双节点互联伪线的系统及方法
CN104753722B (zh) * 2015-04-08 2018-01-02 烽火通信科技股份有限公司 一种快速倒换的dni‑pw实现方法及系统
CN104796331B (zh) * 2015-04-29 2018-02-16 烽火通信科技股份有限公司 一种单交换系统实现lsp和vc分层保护的方法
CN106301852B (zh) * 2015-06-04 2020-04-03 中兴通讯股份有限公司 一种分组传送网设备伪线双归保护的方法及装置
CN109787895B (zh) * 2019-03-29 2020-10-27 烽火通信科技股份有限公司 一种双归保护方法、接入节点、设备及通信网络
CN110572317B (zh) * 2019-07-16 2022-04-08 烽火通信科技股份有限公司 电信网络中实现动态arp热备份的方法及系统
CN111800525A (zh) * 2020-09-07 2020-10-20 广东睿江云计算股份有限公司 一种网关冗余方法及系统
CN112187634A (zh) * 2020-09-17 2021-01-05 武汉烽火技术服务有限公司 一种vrrp横联保护方法及系统

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