WO2011110029A1 - 一种分组传送网络接入环中主机路由可达的方法及系统 - Google Patents

一种分组传送网络接入环中主机路由可达的方法及系统 Download PDF

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Publication number
WO2011110029A1
WO2011110029A1 PCT/CN2010/078661 CN2010078661W WO2011110029A1 WO 2011110029 A1 WO2011110029 A1 WO 2011110029A1 CN 2010078661 W CN2010078661 W CN 2010078661W WO 2011110029 A1 WO2011110029 A1 WO 2011110029A1
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Prior art keywords
node
access
entry
arp
aggregation
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PCT/CN2010/078661
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English (en)
French (fr)
Inventor
李伟
刘道峰
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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 EP10847287.9A priority Critical patent/EP2533475B1/en
Priority to BR112012022549-9A priority patent/BR112012022549B1/pt
Priority to RU2012137184/08A priority patent/RU2526749C2/ru
Publication of WO2011110029A1 publication Critical patent/WO2011110029A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks
    • H04L12/437Ring fault isolation or reconfiguration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/02Topology update or discovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/66Layer 2 routing, e.g. in Ethernet based MAN's
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/09Mapping addresses
    • H04L61/10Mapping addresses of different types
    • H04L61/103Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the present invention relates to a packet transport network (PTN) technology, and more particularly to a method and system for achieving host reachability in a PTN network access ring.
  • PTN packet transport network
  • FIG. 1 is a topology diagram of a PTN network access ring model.
  • a Layer 2 ring network is interconnected by nodes on a Layer 2 access ring, and between nodes 1 and 2 Heartbeat line composition.
  • Each node on the Layer 2 access ring is configured with a host address.
  • the host address configured by the node is on the same network segment as the Layer 3 interface address of the node connected to the Layer 3 routing ring.
  • the two ports of the aggregation node 1 connected to the Layer 2 access ring are configured in VLAN 100, the Layer 3 address is set to 100.1.1.253/24, and the aggregation node 2 is connected to the Layer 2 access ring.
  • the two ports are configured in VLAN 100 and the Layer 3 address is 100.1.1.254/24.
  • the Layer 2 access ring node 1 is configured with VLAN 100
  • the Layer 3 address is 100.1.1.1/24
  • the Layer 2 access node 2 is configured with VLAN 100.
  • the Layer 3 address is 100.1.1.2/24
  • the access node N is configured with VLAN 100 and the Layer 3 address is 100.1.1.N/24.
  • STP Spanning Tree Protocol
  • the loop is blocked by STP to ensure that the Layer 2 access ring does not generate broadcast storms.
  • the broadcast storm is that the data packets are cyclically forwarded in the Layer 2 access ring to form a storm and fill all the bandwidth of the link.
  • the node configuration of the Layer 3 routing ring The Layer 3 interface is interconnected and the Layer 3 routing protocol is enabled.
  • the aggregation nodes 1 and 2 connected to the Layer 2 access ring redistribute the direct route and the static route in the dynamic routing protocol.
  • Node 1 or sink node 2 because the core node and other networks do not have routes to all access nodes carried by another sink node, resulting in all access nodes carried by another sink node being unable to interact with the core node and others.
  • the network performs normal communication. Summary of the invention
  • the main purpose of the present invention is to provide a method and a system for the reachability of a host in a PTN network access ring to solve the problem that the heartbeat between the access nodes and the sink node in the access ring simultaneously breaks.
  • the invention provides a method for the reachability of a host route in a PTN network access ring, including: setting a linkage function between an address resolution protocol (ARP) module and a static route module on a Layer 3 interface of the aggregation node;
  • ARP address resolution protocol
  • the aggregation node automatically updates the static route entry of the learned host node corresponding to the host address according to the learned ARP entry of each access node; the aggregation node will learn the currently accessed access section.
  • the static route corresponding to the host address is advertised to the core node and other networks according to the dynamic routing protocol.
  • the method before the association function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node, the method further includes:
  • VLAN virtual local area network
  • STP virtual local area network
  • the aggregation node connected to the access node is configured with STP transparent transmission, direct connection route, and static route.
  • the Layer 3 interface of the Layer 3 routing ring is configured with Layer 3 interface interconnection and dynamic routing protocol.
  • the method further includes: after the core node and other networks receive the notification, the aggregation node, the core node, and other networks update corresponding dynamic routing entries in the respective dynamic routing tables.
  • the aggregation node automatically updates the static route entry of the learned host address corresponding to the access node according to the learned ARP entry of the access node in real time, as follows:
  • the ARP module of the aggregation node detects whether there is a new ARP. If the new APR entry is added, the aggregation node further determines whether the host address in the added ARP entry is on the same network segment as the Layer 3 interface address of the aggregation node. When the same network segment is determined, the aggregation node is based on the newly added ARP.
  • the entry automatically adds a static routing entry for the corresponding host address of the access node.
  • the aggregation node automatically updates the static route entry of the learned host address corresponding to the access node according to the learned ARP entry of the access node in real time, as follows:
  • the ARP module of the aggregation node detects whether an ARP entry is deleted.
  • the aggregation node further determines whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the aggregation node.
  • the aggregation node automatically deletes the ARP entry according to the deleted ARP entry.
  • the static route entry of the access node corresponding to the host address is the static route entry of the access node corresponding to the host address.
  • the present invention also provides a system in which a host route is reachable in a PTN network access ring, including: a sink node and an access node;
  • the aggregation node is configured to automatically update the static route entry of the learned access node corresponding to the host address according to the learned ARP entry of each access node, and statically route the currently learned access node corresponding to the host address. Notify to the core node and other networks according to the dynamic routing protocol;
  • An access node configured to learn an ARP entry by the sink node.
  • the system further includes: a core node and other networks; wherein, the core node is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node;
  • the other network is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node.
  • the sink node includes two or more sink nodes; the core node includes more than one core node; and the access node includes two or more access nodes.
  • the aggregation node is further configured to update a corresponding dynamic routing entry in the dynamic routing table after the core node and other networks receive the notification; the core node is further used to receive the core node and other networks.
  • the corresponding dynamic routing entry in the dynamic routing table is updated; the other network is further used to update the corresponding dynamic routing entry in the dynamic routing table after the core node and other networks receive the notification.
  • the aggregation node is specifically configured to: the ARP module of the aggregation node detects whether a new ARP entry is added, or has a deleted ARP entry, and determining that the aggregation node further determines the added or deleted ARP entry. Whether the host address is in the same network segment as the Layer 3 interface address of the aggregation node. When the network segment is determined to be in the same network segment, the static route entry corresponding to the host address of the access node is automatically added or deleted according to the newly added ARP entry. Protocol, advertised to core nodes and other networks.
  • the method and system for the reachable host route in the PTN network access ring provided by the present invention, because the sink node sends the static route corresponding to the host address of the access node to the core according to the dynamic routing protocol.
  • Heart nodes and other networks such that when the heartbeat between the access nodes and the sink nodes in the access ring simultaneously breaks, the core node and other networks still have access nodes to all the access nodes of the other sink node. Routing, so that all access nodes carried by another sink node can communicate normally with the core node and other networks, thereby improving the ability of the access node in the PTN network to resist failure.
  • Figure 1 is a topological structural diagram of a PTN network access ring model
  • FIG. 2 is a schematic flowchart of a method for implementing reachable host routes in a PTN network access ring according to the present invention
  • FIG. 3 is a schematic flowchart of a method for configuring a PTN network before use
  • FIG. 4 is a schematic flow chart of a method for implementing the first embodiment
  • FIG. 5 is a schematic flow chart of a method for implementing the second embodiment
  • FIG. 6 is a schematic structural diagram of a system for implementing a reachable host route in a PTN network access ring according to the present invention. detailed description
  • the method for implementing reachable host routes in the PTN network access ring is as shown in FIG. 2, and includes the following steps:
  • Step 201 Set a linkage function between the ARP module and the static routing module on the Layer 3 interface of the aggregation node.
  • the linkage switch between the ARP module and the static routing module can be set on the Layer 3 interface of the aggregation node. After the switch is turned on, the linkage function can be implemented.
  • the implementation of the linkage function is specifically: After the ARP module learns the ARP entry of the access node, the static routing module automatically sends a message related to learning the ARP entry of the access node; after receiving the message, the static routing module receives the message. Set a static route entry corresponding to the host address of the corresponding access node according to the ARP entry in the message. Step 202: The sink node automatically updates the static route entry of the learned host node corresponding to the host address according to the learned ARP entry of each access node.
  • the aggregation node 1 learns the ARP entry of the access node 1 of 100.1.1.1, it is static in itself.
  • a static route entry of 100.1.1.1/32 is added to the routing table, and 32 represents a 32-bit mask.
  • the aggregation node 1 learns the ARP entry of 100.1.1.1 of the access node 1, which is in the ARP module of the aggregation node 1.
  • the aggregation node automatically updates the learned static route entry of the host address corresponding to the access node according to the learned ARP entry of each access node.
  • the learned ARP entry of each access node refers to an ARP entry that learns each access node in the same network segment as the Layer 3 interface of the sink node; the ARP module of the sink node first detects the access to be learned. Whether the Layer 3 interface in the ARP entry of the node is an ARP entry of the access node on the same network segment as the Layer 3 interface of the sink node. If yes, learn. If not, discard the ARP entry of the corresponding access node. .
  • Step 203 The sink node advertises the static route corresponding to the host address of the currently learned access node to the core node and other networks according to the dynamic routing protocol.
  • the aggregation node, the core node, and other networks update the corresponding dynamic routing entries in their respective dynamic routing tables.
  • the aggregation node can advertise to the core node and other networks by sending a static route message of the currently learned access node corresponding to the host address to the core node and other networks.
  • the method further includes:
  • Step 301 Configure a VLAN on the access node of the Layer 2 access ring, and configure a host address, and then perform step 302.
  • the configuration of the host address is to configure the Layer 3 address.
  • the Layer 3 address configured on the same network segment as the Layer 3 interface address of the node connected to the Layer 3 routing ring.
  • the two ports of the aggregation node 1 connected to the Layer 2 access ring are configured in VLAN 100, and the Layer 3 address is set to 100.1.1.253/24.
  • the aggregation node 2 is connected to the Layer 2 access ring.
  • the two ports are configured in VLAN 100, the Layer 3 address is 100.1.1.254/24, the Layer 2 access ring node 1 is configured with VLAN 100, the Layer 3 address is 100.1.1.1/24, and the Layer 2 access node 2 is configured with VLAN 100.
  • the layer address is 100.1.1.2/24, and so on.
  • the access node N is configured with VLAN 100 and the Layer 3 address is set to 100.1.1. ⁇ /24»
  • Step 302 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 303. ;
  • the configuration of the dual-gateway default route refers to two default route configurations, that is, two aggregation nodes.
  • the role of the default route is: If no route matching the destination address is found in the routing table of the access node, The ingress node sends the packet to the two aggregation nodes.
  • the direct connection route may be specifically used to notify the local network segment to other nodes through a dynamic routing protocol
  • the static route refers to assigning a fixed Internet Protocol (IP) address to a Media Access Control (MAC) address corresponding to the node, and guiding the transmission of the packet data.
  • IP Internet Protocol
  • MAC Media Access Control
  • Step 303 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the nodes of the Layer 3 routing ring.
  • the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or an Internet, etc.; the dynamic routing protocol,
  • the nodes specifically used for the Layer 3 routing ring exchange the information of each other, and automatically calculate the optimal path of the data transmission according to the function provided by the dynamic routing protocol, thereby obtaining a dynamic routing table.
  • the aggregation node learns the ARP entries of each access node in real time according to the connection status of the access nodes of the access ring. Therefore, there are two cases of increasing the host route and deleting the host route.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • This embodiment is directed to the process of adding a host route, and describes a process in which the aggregation node advertises to the core node and other networks.
  • the implementation process is as shown in FIG. 4, and includes the following steps:
  • Step 401 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the node of the Layer 3 routing ring, and then perform Step 402.
  • the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or the Internet.
  • Step 402 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 403. ;
  • Step 403 Set a linkage function between the ARP module and the static routing module on the Layer 3 interface of the aggregation node, and then perform step 404;
  • Step 404 The ARP module of the aggregation node detects whether a new ARP entry is added. If yes, step 405 is performed. Otherwise, the current processing flow is ended.
  • an ARP request is sent to the sink node.
  • the sink node After receiving the ARP request, the sink node returns a corresponding ARP response to the access node and adds it to its own ARP cache table.
  • Corresponding ARP entry when the ARP module finds that the ARP entry in the ARP cache table increases, step 405 is performed.
  • Step 405 The aggregation node further determines whether the host address in the added ARP entry is in the same network segment as the Layer 3 interface address of the sink node. If yes, go to step 406. Otherwise, End the current processing flow;
  • the determining whether the host address in the added ARP entry is in the same network segment as the Layer 3 interface address of the sink node is as follows: determining the IP address of the host in the added ARP entry and the IP address of the Layer 3 interface of the sink node If the addresses are the same, if they are the same, go to step 406 on the same network segment. Otherwise, end the current processing flow.
  • the IP address of the access node host is 100.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address of the access node host and the aggregation node are considered.
  • the IP address of the Layer 3 interface is the same. If the IP address of the access node is 200.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address and aggregation node of the access node are considered to be the same.
  • the IP address of the Layer 3 interface is different.
  • Only the host address of the access node on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. That is, only the host address of the access node on the same network segment can be added to the aggregation node.
  • ARP entry in the ARP cache table Generally, the host address of the access node that is not in the same network segment as the Layer 3 interface address of the sink node can be learned by the sink node. The purpose of this step is to ensure the host address in the added ARP entry. It is in the same network segment as the Layer 3 interface address of the aggregation node.
  • Step 406 The aggregation node automatically adds a static route entry corresponding to the host address of the access node according to the newly added ARP entry, and then performs step 407;
  • Step 407 The aggregation node advertises the newly added static route to the core node and other networks according to the dynamic routing protocol, and ends the current processing flow.
  • the sink node can advertise to the core node and other networks by sending a message to the core node and other networks for the static route of the new access node corresponding to the host address.
  • the aggregation node, the core node, and other networks After the core node and other networks receive the advertisement, the aggregation node, the core node, and other networks add dynamic routing entries corresponding to the static route to their dynamic routing tables.
  • Embodiment 2 This embodiment describes a process of deleting a host route and reporting the aggregation node to the core node and other networks.
  • the implementation process is as shown in FIG. 5, and includes the following steps:
  • Step 501 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the node of the Layer 3 routing ring, and then perform Step 502;
  • the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or the Internet.
  • Step 502 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 503. ;
  • Step 503 The association function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node, and then step 504 is performed;
  • Step 504 The ARP module of the aggregation node detects whether there is an ARP entry deletion. If yes, step 505 is performed. Otherwise, the current processing flow is ended.
  • the ARP module of the aggregation node sets an aging timer for each ARP entry in the ARP cache table.
  • a timer is triggered.
  • the timer is triggered when it is not used within 30 seconds.
  • the aggregation node sends an ARP request to the access node. If the ARP response returned by the access node is not received, the ARP module deletes the ARP entry in the ARP cache table, and then proceeds to step 505.
  • the duration of the timer is generally set to 15 ⁇ 20 minutes.
  • Step 505 The aggregation node further determines whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the sink node. If yes, step 506 is performed; otherwise, the current processing flow is ended;
  • the determining whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the sink node is as follows: determining the IP address of the host in the deleted ARP entry and the IP address of the Layer 3 interface of the sink node Whether the addresses are the same, if they are the same, they are executed on the same network segment. Step 506, otherwise, the current processing flow is ended.
  • the IP address of the access node host is 100.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address of the access node host and the aggregation node are considered.
  • the IP address of the Layer 3 interface is the same. If the IP address of the access node is 200.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address and aggregation node of the access node are considered to be the same.
  • the IP address of the Layer 3 interface is different.
  • Only the host address of the access node on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. That is, only the host address of the access node on the same network segment can be added to the aggregation node.
  • the host address of the access node that is not on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. The purpose of this step is to ensure The host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the aggregation node.
  • Step 506 The aggregation node automatically deletes the static route entry corresponding to the host address of the access node according to the deleted ARP entry, and then proceeds to step 507;
  • Step 507 The aggregation node deletes the dynamic routing entry corresponding to the static route from the dynamic routing table, and advertises to the core node and other networks according to the dynamic routing protocol, and ends the current processing process.
  • the sink node can advertise to the core node and other networks by sending a message to the core node and other networks to delete the static route of the host node corresponding to the host address.
  • the core node and other networks After receiving the advertisement, the core node and other networks delete the dynamic routing entries corresponding to the static route from their dynamic routing tables.
  • the present invention further provides a system in which a host route is reachable in a PTN network access ring, and the system includes: a sink node 61 and an access node 62; wherein, the sink node 61, For automatically updating the learned static route entry of the host node corresponding to the host address according to the learned ARP entry of each access node, and accessing the currently learned access
  • the static route corresponding to the host address of the node is advertised to the core node and other networks according to the dynamic routing protocol;
  • the linkage function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node 61;
  • the aggregation node 61 includes more than two aggregation nodes.
  • the access node 62 is configured to learn an ARP entry by the sink node 61.
  • the access node 62 includes more than two access nodes.
  • the system may further include: a core node 63 and other networks 64.
  • the core node 63 is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node 61.
  • the core node 63 includes more than one core node.
  • the other network 64 is configured to receive, according to the dynamic routing protocol, a static route that is advertised by the sink node 61 to learn the host address of the access node;
  • the convergence node 61 is specifically configured to:
  • the ARP module of the sink node 61 detects whether a new ARP entry is added, or has a deleted ARP entry. If so, the sink node 61 further determines whether the host address in the added or deleted ARP entry is equal to the Layer 3 interface address of the sink node. On the same network segment, if yes, the static route entry corresponding to the host address of the access node is automatically added or deleted according to the newly added ARP entry, and is advertised to the core node 63 and other networks 64 according to the dynamic routing protocol.
  • the aggregation node 61 is further configured to be configured with an STP transparent transmission, a direct connection route, and a static route, and is also configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
  • the access node 62 is further configured to configure a VLAN network and a host address, and configure an STP and a gateway default route.
  • the core node 63 is further configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
  • the other network 64 is further configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
  • the aggregation node 61 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification;
  • the core node 63 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification;
  • the other network 64 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
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Abstract

本发明公开了一种分组传送(PTN)网络接入环中主机路由可达的方法,包括:在汇聚节点的三层接口设置地址解析协议(ARP)模块与静态路由模块的联动功能;汇聚节点实时根据学习到的每个接入节点的ARP条目,自动更新学习到的接入节点对应主机地址的静态路由条目;汇聚节点将当前学习到的接入节点对应主机地址的静态路由,依据动态路由协议,通告给核心节点以及其它网络。本发明同时公开了一种PTN网络接入环中主机路由可达的系统,采用本发明的方法和系统,当接入环中接入节点间和汇聚节点之间心跳线同时出现断路时,另外一个汇聚节点所带的所有接入节点都能和核心节点以及其它网络进行正常通信,进而提高PTN网络中接入节点抵抗故障的能力。

Description

一种分组传送网 ^^入环中主 *1 ^由可达的方法及系统 技术领域
本发明涉及分组传送网络(PTN, Packet Transport Network )技术, 尤 其涉及一种 PTN网络接入环中主机路由可达的方法及系统。 背景技术
在目前的电信组网、 企业网组网等各种 PTN组网中, 为了保证下行节 点不会因为单点故障导致业务中断, 通常都会釆用接入环模型。 具体地讲, 图 1为 PTN网络接入环模型的拓朴结构图, 从图 1中可以看出, 二层环网 络由二层接入环上的节点互联、 以及汇聚节点 1和 2之间的心跳线组成。 其中, 二层接入环上的每个节点都配置一个主机地址, 节点配置的主机地 址与三层路由环所连节点的三层接口地址在同一网段。 举个例子来说, 如 图 1所示, 汇聚节点 1连接二层接入环的两个端口配置在 VLAN100, 配置 三层地址为 100.1.1.253/24, 汇聚节点 2连接二层接入环的两个端口配置在 VLAN100 , 配置三层地址为 100.1.1.254/24 , 二层接入环节点 1 配置 VLAN100, 配置三层地址为 100.1.1.1/24, 二层接入节点 2配置 VLAN 100, 配置三层地址为 100.1.1.2/24, 依此类推, 接入节点 N配置 VLAN100, 配 置三层地址为 100.1.1.N/24。
在 PTN组网使用前, 还需要完成以下操作:
在二层接入环的接入节点开启生成树协议 ( STP , Spanning Tree Protocol ), 并在二层接入环的汇聚节点 1和 2开启 STP透传, 当二层接入 环的接入节点间都是连通状态时通过 STP来阻塞环路, 以保证二层接入环 不会产生广播风暴。 所述广播风暴是指数据报文在二层接入环中不停循环 转发, 形成风暴, 将链路所有的带宽占满; 在所有二层接入环的接入节点上配置双网关默认路由, 由此上行到汇 聚节点, 再通过两个汇聚节点上行到汇聚环上的核心节点以及其它网络; 三层路由环的节点配置三层接口互联, 并开启三层路由协议; 其中, 与二层接入环连接的汇聚节点 1和 2, 在动态路由协议中重分配直连路由、 以及静态路由。
从图 1 中可以看出, 当二层接入环的接入节点间有断路, 或者, 汇聚 节点 1和 2之间的心跳线出现断路时, 二层接入环上的所有接入节点都能 顺利访问到汇聚节点、 核心节点以及其它网络。 但是, 当二层接入环的接 入节点间、 以及汇聚节点 1和 2之间的心跳线同时出现断路时, 由于汇聚 节点 1和 2与二层接入环连接的接口配置的是同一网段的两个地址, 因此, 在核心节点以及其它网络通过动态路由协议计算出的路由只会选择一条路 由, 所以, 就会造成路由只会到达汇聚节点的一边, 也就是说, 只会指向 汇聚节点 1或汇聚节点 2, 如此, 由于核心节点以及其它网络没有到另一个 汇聚节点所带的所有接入节点的路由, 从而导致另一个汇聚节点所带的所 有接入节点无法与核心节点以及其它网络进行正常通信。 发明内容
有鉴于此, 本发明的主要目的在于提供一种 PTN网络接入环中主机路 由可达的方法及系统, 以解决接入环中接入节点间和汇聚节点之间心跳线 同时出现断路时, 导致部分接入节点与外层网络通信中断的缺陷。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种 PTN网络接入环中主机路由可达的方法, 包括: 在汇聚节点的三层接口设置地址解析协议(ARP, Address Resolution Protocol )模块与静态路由模块的联动功能;
汇聚节点根据学习到的每个接入节点的 ARP条目, 自动更新学习到的 接入节点对应主机地址的静态路由条目; 汇聚节点将当前学习到的接入节 点对应主机地址的静态路由依据动态路由协议, 通告给核心节点以及其它 网络。
上述方案中, 在汇聚节点的三层接口设置 ARP模块与静态路由模块的 联动功能之前, 该方法进一步包括:
在二层接入环的接入节点上配置虚拟局域网( VLAN , Virtual Local Area Network ), 并配置主机地址; 在二层接入环的接入节点配置 STP、 以及双 网关缺省路由, 并在接入节点所连接的汇聚节点配置 STP透传、 直连路由、 以及静态路由; 在三层路由环的节点配置三层接口互联和动态路由协议。
上述方案中, 该方法还包括: 核心节点以及其它网络收到通告后, 汇 聚节点、 核心节点、 以及其它网络更新各自动态路由表中相应的动态路由 条目。
上述方案中, 所述汇聚节点实时根据学习到的每个接入节点的 ARP条 目自动更新学习到的接入节点对应主机地址的静态路由条目, 为: 汇聚节 点的 ARP模块检测是否有新的 ARP条目增加, 有新增 APR条目时, 汇聚 节点进一步判断增加的 ARP条目中的主机地址是否与汇聚节点的三层接口 地址在同一网段, 确定在同一网段时, 汇聚节点根据新增的 ARP条目自动 增加所述接入节点对应主机地址的静态路由条目。
上述方案中, 所述汇聚节点实时根据学习到的每个接入节点的 ARP条 目自动更新学习到的接入节点对应主机地址的静态路由条目, 为: 汇聚节 点的 ARP模块检测是否有 ARP条目删除, 有删除 APR条目时, 汇聚节点 进一步判断删除的 ARP条目中的主机地址是否与汇聚节点的三层接口地址 在同一网段, 确定在同一网段时, 汇聚节点根据删除的 ARP条目自动删除 该接入节点对应主机地址的静态路由条目。
本发明还提供了一种 PTN网络接入环中主机路由可达的系统, 包括: 汇聚节点及接入节点; 其中, 汇聚节点, 用于实时根据学习到的每个接入节点的 ARP条目, 自动更 新学习到的接入节点对应主机地址的静态路由条目, 并将当前学习到的接 入节点对应主机地址的静态路由依据动态路由协议, 通告给核心节点以及 其它网络;
接入节点, 用于被汇聚节点学习 ARP条目。
上述方案中, 该系统进一步包括: 核心节点及其它网络; 其中, 核心节点, 用于依据动态路由协议, 接收汇聚节点通告的当前学习到 的接入节点对应主机地址的静态路由;
其它网络, 用于依据动态路由协议, 接收汇聚节点通告的当前学习到 的接入节点对应主机地址的静态路由。
上述方案中, 所述汇聚节点包括两个以上汇聚节点; 所述核心节点包 括一个以上核心节点; 所述接入节点包括两个以上接入节点。
上述方案中, 所述汇聚节点, 还用于在核心节点以及其它网络收到通 告后, 更新动态路由表中相应的动态路由条目; 所述核心节点, 还用于在 核心节点以及其它网络收到通告后, 更新动态路由表中相应的动态路由条 目; 所述其它网络, 还用于在核心节点以及其它网络收到通告后, 更新动 态路由表中相应的动态路由条目。
上述方案中, 所述汇聚节点, 具体用于: 汇聚节点的 ARP模块检测是 否有新的 ARP条目增加、或有删除的 ARP条目, 确定有时, 汇聚节点进一 步判断增加、 或删除的 ARP条目中的主机地址是否与汇聚节点的三层接口 地址在同一网段, 确定在同一网段时, 根据新增的 ARP条目自动增加、 或 删除该接入节点对应主机地址的静态路由条目, 并依据动态路由协议, 通 告给核心节点以及其它网络。
本发明提供的 PTN网络接入环中主机路由可达的方法及系统, 由于汇 聚节点将接入节点对应主机地址的静态路由依据动态路由协议, 通告给核 心节点以及其它网络, 如此, 当接入环中接入节点间和汇聚节点之间心跳 线同时出现断路时, 核心节点以及其它网络仍会有到另一个汇聚节点所带 的所有接入节点的路由, 从而使得另一个汇聚节点所带的所有接入节点都 能与核心节点以及其它网络进行正常通信, 进而提高 PTN网络中接入节点 抵抗故障的能力。 附图说明
图 1为 PTN网络接入环模型的拓朴结构图;
图 2为本发明实现 PTN网络接入环中主机路由可达的方法流程示意图; 图 3为 PTN网络使用前配置的方法流程示意图;
图 4为实现实施例一的方法流程示意图;
图 5为实现实施例二的方法流程示意图;
图 6为本发明实现 PTN网络接入环中主机路由可达的系统结构示意图。 具体实施方式
下面结合附图及具体实施例对本发明再作进一步详细的说明。
本发明实现 PTN网络接入环中主机路由可达的方法如图 2所示, 包括 以下步骤:
步骤 201 : 在汇聚节点的三层接口设置 ARP模块与静态路由模块的联 动功能;
这里, 可以在汇聚节点的三层接口设置一个 ARP模块与静态路由模块 的联动开关, 开关打开以后, 即可实现所述联动功能。
所述联动功能的实现具体为: ARP模块学习到接入节点的 ARP条目后, 会自动给静态路由模块发送一个与学习到接入节点的 ARP 条目相关的消 息; 静态路由模块收到消息后, 根据消息中的 ARP条目设置相应的接入节 点对应主机地址的静态路由条目。 步骤 202: 汇聚节点根据学习到的每个接入节点的 ARP条目, 自动更 新学习到的接入节点对应主机地址的静态路由条目;
这里, 举个例子来说, 以图 1所示的 PTN网络接入环模型的拓朴结构 图为例, 汇聚节点 1学习到接入节点 1的 100.1.1.1的 ARP条目后, 在自身 的静态路由表中增加一条 100.1.1.1/32的静态路由条目, 32表示 32位掩码; 汇聚节点 1学习到接入节点 1的 100.1.1.1的 ARP条目, 是指在汇聚节点 1 的 ARP模块中的 ARP緩存表中存在接入节点 1的 100.1.1.1的 ARP条目。
在实际应用时, 汇聚节点会实时根据学习到的每个接入节点的 ARP条 目, 自动更新学习到的接入节点对应主机地址的静态路由条目。
所述学习到的每个接入节点的 ARP条目, 是指学习到与汇聚节点的三 层接口在同一网段的各个接入节点的 ARP条目;汇聚节点的 ARP模块首先 检测将要学习的接入节点的 ARP条目中的三层接口, 是否为与汇聚节点的 三层接口在同一网段的接入节点的 ARP条目, 如果是, 则进行学习, 如果 不是, 则丟掉相应接入节点的 ARP条目。
步骤 203 : 汇聚节点将当前学习到的接入节点对应主机地址的静态路 由, 依据动态路由协议, 通告给核心节点以及其它网络。
这里, 核心节点以及其它网络收到通告后, 汇聚节点、 核心节点、 以 及其它网络都会更新各自动态路由表中相应的动态路由条目。
汇聚节点可以通过给核心节点以及其它网络发送当前学习到的接入节 点对应主机地址的静态路由消息的方式, 通告给核心节点以及其它网络。
由于汇聚节点实时将接入节点对应主机地址的静态路由依据动态路由 协议, 通告给核心节点以及其它网络, 因此, 当接入环中接入节点间和汇 聚节点之间心跳线同时出现断路时, 核心节点以及其它网络仍会有到另一 个汇聚节点所带的所有接入节点的路由, 从而使得另一个汇聚节点所带的 所有接入节点都能与核心节点以及其它网络进行正常通信。 在步骤 201之前, 如图 3所示, 该方法还包括:
步骤 301 : 在二层接入环的接入节点上配置 VLAN, 并配置主机地址, 之后执行步骤 302;
这里, 配置主机地址就是配置三层地址, 配置的三层地址与三层路由 环所连节点的三层接口地址在同一网段。 举个例子来说, 如图 1 所示, 汇 聚节点 1 连接二层接入环的两个端口配置在 VLAN100, 配置三层地址为 100.1.1.253/24, 汇聚节点 2连接二层接入环的两个端口配置在 VLAN100, 配置三层地址为 100.1.1.254/24,二层接入环节点 1配置 VLAN100, 配置三 层地址为 100.1.1.1/24, 二层接入节点 2配置 VLAN100, 配置三层地址为 100.1.1.2/24, 依此类推, 接入节点 N 配置 VLAN100 , 配置三层地址为 100.1.1.Ν/24»
步骤 302: 在二层接入环的接入节点配置 STP、 以及双网关缺省路由, 并在接入节点所连接的汇聚节点配置 STP透传、 直连路由、 以及静态路由, 之后执行步骤 303;
这里, 配置双网关缺省路由是指缺省路由配置两个, 即两个汇聚节点, 缺省路由的作用是: 在接入节点的路由表中如果没有找到与目的地址匹配 的路由时, 接入节点则将数据包发送给两个汇聚节点。
所述直连路由, 可具体用于将本地的网段通过动态路由协议通告给 其它节点;
所述静态路由, 是指将固定的英特网协议(IP, Internet Protocol )地址 分给节点对应的媒体访问控制 (MAC, Media Access Control )地址, 指导 报文数据的发送。
步骤 303: 在三层路由环的节点配置三层接口互联和动态路由协议。 这里, 所述三层路由环的节点包括: 汇聚节点、 核心节点、 以及其它 网络; 所述其它网络, 可以是移动网、 或者互联网等; 所述动态路由协议, 具体用于三层路由环的节点之间通过交换彼此的信息, 并根据动态路由协 议提供的功能自动计算数据传输的最佳路径, 由此得到动态路由表。
在 PTN网络中, 汇聚节点会根据接入环的接入节点的连接情况实时学 习每个接入节点的 ARP条目, 因此, 会出现增加主机路由和删除主机路由 的两种情况。
实施例一:
本实施例针对增加主机路由的情况, 描述汇聚节点通告给核心节点以 及其它网络的过程, 实现过程如图 4所示, 包括以下步骤:
步骤 401 : 在三层路由环的节点配置三层接口互联和动态路由协议,之 后执行步骤 402;
这里, 所述三层路由环的节点包括: 汇聚节点、 核心节点、 以及其它 网络; 所述其它网络, 可以是移动网、 或者互联网等。
步骤 402: 在二层接入环的接入节点配置 STP、 以及双网关缺省路由, 并在接入节点所连接的汇聚节点配置 STP透传、 直连路由、 以及静态路由, 之后执行步骤 403;
步骤 403: 在汇聚节点的三层接口设置 ARP模块与静态路由模块的联 动功能, 之后执行步骤 404;
步骤 404: 汇聚节点的 ARP模块检测是否有新的 ARP条目增加, 如果 有, 则执行步骤 405 , 否则, 结束当前处理流程;
这里, 接入节点连接到 PTN 网络中后, 会向汇聚节点发送一个 ARP 请求,汇聚节点收到 ARP请求后,会向接入节点返回一个相应的 ARP响应, 并在自身的 ARP緩存表中增加相应的 ARP条目,当 ARP模块发现 ARP緩 存表中的 ARP条目增加时, 执行步骤 405。
步骤 405: 汇聚节点进一步判断增加的 ARP条目中的主机地址, 是否 与汇聚节点的三层接口地址在同一网段, 如果是, 则执行步骤 406, 否则, 结束当前处理流程;
这里, 所述判断增加的 ARP条目中的主机地址是否与汇聚节点的三层 接口地址在同一网段,具体为: 判断增加的 ARP条目中的主机的 IP地址和 汇聚节点的三层接口的 IP地址是否相同, 如果相同, 则在同一网段, 执行 步骤 406, 否则, 结束当前处理流程。
举个例子来说, 如果接入节点主机的 IP地址为 100.1.1.1/24, 汇聚节点 的三层接口的 IP地址为 100.1.1.253/24, 则认为接入节点主机的 IP地址和 汇聚节点的三层接口的 IP 地址相同; 如果接入节点的 IP 地址为 200.1.1.1/24, 汇聚节点的三层接口的 IP地址为 100.1.1.253/24, 则认为接入 节点主机的 IP地址和汇聚节点的三层接口的 IP地址不相同。
只有与汇聚节点的三层接口地址在同一网段的接入节点的主机地址才 能被汇聚节点学习到, 也就是说, 只有同一网段的接入节点的主机地址, 才能被增加到汇聚节点的 ARP緩存表中的 ARP条目中。一般, 不会出现与 汇聚节点的三层接口地址不在同一网段的接入节点的主机地址能被汇聚节 点学习到的情况, 本步骤执行的目的是: 为了确保增加的 ARP条目中的主 机地址是与汇聚节点的三层接口地址在同一网段。
步骤 406: 汇聚节点根据新增的 ARP条目, 自动增加该接入节点对应 主机地址的静态路由条目, 之后执行步骤 407;
步骤 407: 汇聚节点将新增的静态路由, 依据动态路由协议, 通告给核 心节点以及其它网络, 结束当前处理流程。
这里, 汇聚节点可以通过给核心节点以及其它网络发送新增接入节点 对应主机地址的静态路由的消息方式, 通告给核心节点以及其它网络。
核心节点以及其它网络收到通告后, 汇聚节点、 核心节点、 以及其它 网络都会在各自的动态路由表中增加该条静态路由对应的动态路由条目。
实施例二: 本实施例针对删除主机路由的情况, 描述汇聚节点通告给核心节点以 及其它网络的过程, 实现过程如图 5所示, 包括以下步骤:
步骤 501 : 在三层路由环的节点配置三层接口互联和动态路由协议,之 后执行步骤 502;
这里, 所述三层路由环的节点包括: 汇聚节点、 核心节点、 以及其它 网络; 所述其它网络, 可以是移动网、 或者互联网等。
步骤 502: 在二层接入环的接入节点配置 STP、 以及双网关缺省路由, 并在接入节点所连接的汇聚节点配置 STP透传、 直连路由、 以及静态路由, 之后执行步骤 503;
步骤 503: 在汇聚节点的三层接口设置 ARP模块与静态路由模块的联 动功能, 之后执行步骤 504;
步骤 504: 汇聚节点的 ARP模块检测是否有 ARP条目删除, 如果有, 则执行步骤 505 , 否则, 结束当前处理流程;
这里, 汇聚节点的 ARP模块给 ARP緩存表中的每条 ARP条目设置一 个老化定时器, ARP条目在一定时间内没有被使用时会触发定时器, 一般 为 30s内没有被使用时则会触发定时器, 当定时器超时后, 汇聚节点会向接 入节点发送一个 ARP请求, 如果没有收到接入节点返回的 ARP响应, 则 ARP模块会删除 ARP緩存表中的 ARP条目,之后执行步骤 505 ,定时器的 时长一般设置 15~20分钟。
步骤 505: 汇聚节点进一步判断删除的 ARP条目中的主机地址, 是否 与汇聚节点的三层接口地址在同一网段, 如果是, 则执行步骤 506, 否则, 结束当前处理流程;
这里, 所述判断删除的 ARP条目中的主机地址是否与汇聚节点的三层 接口地址在同一网段,具体为: 判断删除的 ARP条目中的主机的 IP地址和 汇聚节点的三层接口的 IP地址是否相同, 如果相同, 则在同一网段, 执行 步骤 506, 否则, 结束当前处理流程。
举个例子来说, 如果接入节点主机的 IP地址为 100.1.1.1/24, 汇聚节点 的三层接口的 IP地址为 100.1.1.253/24, 则认为接入节点主机的 IP地址和 汇聚节点的三层接口的 IP 地址相同; 如果接入节点的 IP 地址为 200.1.1.1/24, 汇聚节点的三层接口的 IP地址为 100.1.1.253/24, 则认为接入 节点主机的 IP地址和汇聚节点的三层接口的 IP地址不相同。
只有与汇聚节点的三层接口地址在同一网段的接入节点的主机地址才 能被汇聚节点学习到, 也就是说, 只有同一网段的接入节点的主机地址, 才能被增加到汇聚节点的 ARP緩存表中的 ARP条目中,一般, 不会出现与 汇聚节点的三层接口地址不在同一网段的接入节点的主机地址能被汇聚节 点学习到的情况, 本步骤执行的目的是为了确保删除的 ARP条目中的主机 地址是与汇聚节点的三层接口地址在同一网段。
步骤 506: 汇聚节点根据删除的 ARP条目自动删除该接入节点对应主 机地址的静态路由条目, 之后执行步骤 507;
步骤 507:汇聚节点从动态路由表中删除该条静态路由对应的动态路由 条目, 并依据动态路由协议, 通告给核心节点以及其它网络, 结束当前处 理流程。
这里, 汇聚节点可以通过给核心节点以及其它网络发送删除接入节点 对应主机地址的静态路由的消息方式, 通告给核心节点以及其它网络。
核心节点以及其它网络收到通告后, 会从各自的动态路由表中删除该 条静态路由对应的动态路由条目。
为实现上述方法, 如图 6所示, 本发明还提供了一种 PTN网络接入环 中主机路由可达的系统, 该系统包括: 汇聚节点 61及接入节点 62; 其中, 汇聚节点 61 , 用于根据学习到的每个接入节点的 ARP条目, 自动更新 学习到的接入节点对应主机地址的静态路由条目, 并将当前学习到的接入 节点对应主机地址的静态路由依据动态路由协议, 通告给核心节点以及其 它网络;
这里, 在汇聚节点 61 的三层接口设置 ARP模块与静态路由模块的联 动功能;
需要说明的是: 汇聚节点 61包括两个以上汇聚节点。
接入节点 62 , 用于被汇聚节点 61学习 ARP条目。
这里, 需要说明的是: 接入节点 62包括两个以上接入节点。
其中, 该系统还可以进一步包括: 核心节点 63及其它网络 64; 其中, 核心节点 63 , 用于依据动态路由协议,接收汇聚节点 61通告的当前学习到 的接入节点对应主机地址的静态路由;
这里, 需要说明的是: 核心节点 63包括一个以上核心节点。
其它网络 64, 用于依据动态路由协议,接收汇聚节点 61通告的当前学 习到接入节点对应主机地址的静态路由;
其中, 所述汇聚节点 61 , 具体用于:
汇聚节点 61的 ARP模块检测是否有新的 ARP条目增加、 或有删除的 ARP条目, 如果有, 汇聚节点 61进一步判断增加、 或删除的 ARP条目中 的主机地址是否与汇聚节点的三层接口地址在同一网段, 如果是, 根据新 增的 ARP条目自动增加、或删除该接入节点对应主机地址的静态路由条目, 并依据动态路由协议, 通告给核心节点 63以及其它网络 64。
所述汇聚节点 61 ,还用于被配置 STP透传、直连路由、 以及静态路由, 还用于被配置三层接口互联和动态路由协议;
所述接入节点 62 , 还用于配置 VLAN网络和主机地址, 并配置 STP、 以及网关缺省路由;
所述核心节点 63 , 还用于被配置三层接口互联和动态路由协议; 所述其它网络 64, 还用于被配置三层接口互联和动态路由协议。 所述汇聚节点 61 ,还用于在核心节点 63以及其它网络 64收到通告后, 更新动态路由表中相应的动态路由条目;
所述核心节点 63 ,还用于在核心节点 63以及其它网络 64收到通告后, 更新动态路由表中相应的动态路由条目;
所述其它网络 64 ,还用于在核心节点 63以及其它网络 64收到通告后, 更新动态路由表中相应的动态路由条目。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种分组传送(PTN ) 网络接入环中主机路由可达的方法, 其特征 在于, 该方法包括:
在汇聚节点的三层接口设置地址解析协议(ARP )模块与静态路由模 块的联动功能;
汇聚节点根据学习到的每个接入节点的 ARP条目, 自动更新学习到的 接入节点对应主机地址的静态路由条目; 汇聚节点将当前学习到的接入节 点对应主机地址的静态路由依据动态路由协议, 通告给核心节点以及其它 网络。
2、 根据权利要求 1所述的方法, 其特征在于, 在汇聚节点的三层接口 设置 ARP模块与静态路由模块的联动功能之前, 该方法进一步包括: 在二层接入环的接入节点上配置虚拟局域网 ( VLAN ), 并配置主机地 址;
在二层接入环的接入节点配置生成树协议( STP )、 以及双网关缺省路 由, 并在接入节点所连接的汇聚节点配置 STP透传、 直连路由、 以及静态 路由;
在三层路由环的节点配置三层接口互联和动态路由协议。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 该方法还包括: 核 心节点以及其它网络收到通告后, 汇聚节点、 核心节点、 以及其它网络更 新各自动态路由表中相应的动态路由条目。
4、 根据权利要求 1或 2所述的方法, 其特征在于, 所述汇聚节点实时 根据学习到的每个接入节点的 ARP条目自动更新学习到的接入节点对应主 机地址的静态路由条目, 为:
汇聚节点的 ARP模块检测是否有新的 ARP条目增加, 有新增 APR条 目时, 汇聚节点进一步判断增加的 ARP条目中的主机地址是否与汇聚节点 的三层接口地址在同一网段,确定在同一网段时,汇聚节点根据新增的 ARP 条目自动增加所述接入节点对应主机地址的静态路由条目。
5、 根据权利要求 1或 2所述的方法, 其特征在于, 所述汇聚节点实时 根据学习到的每个接入节点的 ARP条目自动更新学习到的接入节点对应主 机地址的静态路由条目, 为:
汇聚节点的 ARP模块检测是否有 ARP条目删除,有删除 APR条目时, 汇聚节点进一步判断删除的 ARP条目中的主机地址是否与汇聚节点的三层 接口地址在同一网段, 确定在同一网段时, 汇聚节点根据删除的 ARP条目 自动删除该接入节点对应主机地址的静态路由条目。
6、一种 PTN网络接入环中主机路由可达的系统 , 其特征在于 , 该系统 包括: 汇聚节点及接入节点; 其中,
汇聚节点, 用于实时根据学习到的每个接入节点的 ARP条目, 自动更 新学习到的接入节点对应主机地址的静态路由条目, 并将当前学习到的接 入节点对应主机地址的静态路由依据动态路由协议, 通告给核心节点以及 其它网络;
接入节点, 用于被汇聚节点学习 ARP条目。
7、 根据权利要求 6所述的装置, 其特征在于, 该系统进一步包括: 核 心节点及其它网络; 其中,
核心节点, 用于依据动态路由协议, 接收汇聚节点通告的当前学习到 的接入节点对应主机地址的静态路由;
其它网络, 用于依据动态路由协议, 接收汇聚节点通告的当前学习到 的接入节点对应主机地址的静态路由。
8、 根据权利要求 7所述的系统, 其特征在于,
所述汇聚节点包括两个以上汇聚节点;
所述核心节点包括一个以上核心节点; 所述接入节点包括两个以上接入节点。
9、 根据权利要求 8所述的系统, 其特征在于,
所述汇聚节点, 还用于在核心节点以及其它网络收到通告后, 更新动 态路由表中相应的动态路由条目;
所述核心节点, 还用于在核心节点以及其它网络收到通告后, 更新动 态路由表中相应的动态路由条目;
所述其它网络, 还用于在核心节点以及其它网络收到通告后, 更新动 态路由表中相应的动态路由条目。
10、 根据权利要求 6至 9任一项所述的系统, 其特征在于, 所述汇聚 节点, 具体用于:
汇聚节点的 ARP模块检测是否有新的 ARP条目增加、或有删除的 ARP 条目, 确定有时, 汇聚节点进一步判断增加、 或删除的 ARP条目中的主机 地址是否与汇聚节点的三层接口地址在同一网段, 确定在同一网段时, 根 据新增的 ARP条目自动增加、 或删除该接入节点对应主机地址的静态路由 条目, 并依据动态路由协议, 通告给核心节点以及其它网络。
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CN104683206A (zh) * 2013-11-29 2015-06-03 中国移动通信集团内蒙古有限公司 桥接设备内二层与三层虚拟专用网协调倒换的方法及装置
CN104702431A (zh) * 2013-12-10 2015-06-10 中国移动通信集团内蒙古有限公司 一种虚拟专用网双断保护的方法及装置
CN104702431B (zh) * 2013-12-10 2018-10-26 中国移动通信集团内蒙古有限公司 一种虚拟专用网双断保护的方法及装置
CN113810511A (zh) * 2021-08-06 2021-12-17 锐捷网络股份有限公司 Arp表的更新方法及装置
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EP2533475A4 (en) 2016-12-07
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