WO2017036176A1 - Procédé et appareil d'identification de pseudo-nœud - Google Patents

Procédé et appareil d'identification de pseudo-nœud Download PDF

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Publication number
WO2017036176A1
WO2017036176A1 PCT/CN2016/081893 CN2016081893W WO2017036176A1 WO 2017036176 A1 WO2017036176 A1 WO 2017036176A1 CN 2016081893 W CN2016081893 W CN 2016081893W WO 2017036176 A1 WO2017036176 A1 WO 2017036176A1
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WIPO (PCT)
Prior art keywords
interface
intermediate system
dis
protocol
dis election
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PCT/CN2016/081893
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English (en)
Chinese (zh)
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吴强
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中兴通讯股份有限公司
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Publication of WO2017036176A1 publication Critical patent/WO2017036176A1/fr

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    • 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
    • H04L45/02—Topology update or discovery

Definitions

  • the present application relates to, but is not limited to, Internet technology, and more particularly to a method and device for identifying a pseudo node.
  • the Intermediate System to Intermediate System (IS-IS) routing protocol is a dynamic, link state based internal gateway protocol.
  • each intermediate system (IS) can generate the link state protocol data generated by itself.
  • the LSP Link-State Packet
  • the received link state protocol packets sent by other intermediate systems are sent out through the interface connected to the neighboring node to implement LSP flooding, that is, all ISs in the network are saved. LSP.
  • LAN local area network
  • DIS designated intermediate system
  • the designated intermediate system determines the protocol identifier of the pseudo node, and the protocol identifier of the pseudo node includes the system identifier system-ID of the specified intermediate system plus the protocol interface identifier circuit-ID of the interface.
  • the system identifier system-ID of the intermediate system of the specified intermediate system is 1111.1111.1111
  • the protocol interface identifier circuit-ID of the interface connecting another intermediate system is 3.
  • the protocol identifier of the pseudo node is 1111.1111.1111.03.
  • the protocol interface identifier ranges from 1 to 255. If the intermediate system has more than 255 device interfaces connected to other intermediate systems, the device interface exceeds 255.
  • the protocol interface identifiers are all defined as FFs. That is to say, in the local area network, multiple identical protocol identifiers may occur, which may result in incorrect topology calculation, which may result in data traffic being discarded.
  • the embodiment of the invention provides a method and a device for identifying a pseudo node, which can solve the problem that multiple identical protocol identifiers appear.
  • An embodiment of the present invention provides a method for identifying a pseudo node, including:
  • the first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same, the two interfaces include a first interface and a second interface, and the first intermediate system passes the third interface of the first interface and the second intermediate system Connecting, the first intermediate system is connected to the fourth interface of the third intermediate system through the second interface;
  • the first intermediate system sets a DIS election priority of the first interface to a lowest value according to a specified intermediate system (DIS) election rule, so that the second intermediate system is a designated intermediate system that determines a pseudo node protocol identifier.
  • the DIS election rule includes an intermediate system with an interface election priority being a specified intermediate system for determining a pseudo node protocol identifier, where the pseudo node is a first interface of the first intermediate system and a second intermediate system A virtual node on a local area network (LAN) between three interfaces.
  • LAN local area network
  • the method further includes:
  • the first intermediate system determines that the first DIS election priority is equal to the third DIS election priority, and the first DIS election priority includes a DIS election priority of the first interface of the first intermediate system, where the first The third DIS election priority includes a DIS election priority of the third interface of the second intermediate system;
  • the intermediate system with a medium access control (MAC, Media Access Control) address of the first interface of the first intermediate system and the third interface of the second intermediate system is elected as the designated intermediate system of the pseudo node protocol identifier.
  • MAC Medium access control
  • the method further includes:
  • the first intermediate system determines, according to the device interface index value of the first interface and the device interface index value of the second interface, that the interface with a smaller interface index value is an interface that determines the pseudo node protocol identifier;
  • the first intermediate system is created on a LAN connected to an interface with a small interface index value. Create a pseudo node.
  • the method further includes:
  • the first intermediate system sends a hello message to the second intermediate system, so that the second intermediate system determines the protocol identifier of the pseudo node according to the DIS election priority carried in the neighbor message,
  • the neighbor message includes information that the DIS election priority of the first interface is set to the lowest value.
  • the method further includes:
  • the first intermediate system acquires a link state protocol data packet, where the link state protocol data packet includes at least: link state information of the first intermediate system, and/or link state information of the second intermediate system .
  • the method further includes:
  • the first intermediate system transmits the link state protocol data packet through an interface indicated by the protocol interface identifier.
  • the embodiment of the invention provides a pseudo node identification device, including:
  • a determining module configured to determine that the protocol interface identifiers of the at least two interfaces are the same, wherein the two interfaces include a first interface and a second interface, where the first intermediate system passes through the first interface and the second intermediate system a third interface is connected, and the first intermediate system is connected to the fourth interface of the third intermediate system by using the second interface;
  • a setting module configured to: set a DIS election priority of the first interface to a lowest value according to a DIS election rule, so that the second intermediate system is a designated intermediate system that determines a pseudo node protocol identifier, where
  • the DIS election rule includes an intermediate system with an interface election priority being a specified intermediate system for determining a pseudo node protocol identifier, where the pseudo node is a first interface of the first intermediate system and a third interface of the second intermediate system.
  • the determining module is further configured to: determine a first DIS election priority and a third DIS The election priority is equal, wherein the first DIS election priority includes a DIS election priority of the first interface of the first intermediate system, and the third DIS election priority includes a third of the second intermediate system.
  • the DIS election priority of the interface; the intermediate system with the MAC address of the first interface of the first intermediate system and the third interface of the second intermediate system is elected as the designated intermediate system of the pseudo node protocol identifier.
  • the determining module is further configured to: determine, according to the device interface index value of the first interface, and the device interface index value of the second interface, that the interface with the smallest interface index value is a determining pseudo node An interface identified by the protocol; a pseudo node is created on the LAN to which the interface with the smallest interface index value of the device is connected.
  • the pseudo node identification device further includes: a sending module
  • the sending module is configured to: send a hello message to the second intermediate system, so that the second intermediate system determines the protocol identifier of the pseudo node according to the DIS election priority carried by the neighbor message.
  • the neighbor message includes information that the DIS election priority of the first interface is set to the lowest value.
  • the pseudo node identification device further includes: an acquiring module;
  • the acquiring module is configured to acquire a link state protocol data packet, where the link state protocol data packet includes at least two of the following or a combination thereof: link state information of the first intermediate system, or Link state information of the second intermediate system.
  • the sending module is further configured to send the link state protocol data packet by using an interface indicated by the protocol interface identifier.
  • an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and the pseudo node identification method is implemented when the computer executable instructions are executed.
  • the first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same, the two interfaces include the first interface and the second interface, and the first intermediate system passes the first interface and the first interface a third interface of the second intermediate system, wherein the first intermediate system is connected to the fourth interface of the third intermediate system by using the second interface; the first intermediate system, according to the DIS election rule, the first interface
  • the DIS election priority is set to a lowest value, so that the second intermediate system is a designated intermediate system that determines a pseudo node protocol identifier, and the DIS election rule includes an interface election priority.
  • the intermediate system of the level is a designated intermediate system that determines the identity of the pseudo node protocol, the pseudo node being a node on the LAN between the first interface of the first intermediate system and the third interface of the second intermediate system. In this way, multiple identical protocol identifiers are avoided in the local area network, thereby improving the accuracy of topology calculation, thereby reducing data traffic discarding.
  • FIG. 1 is a schematic flowchart of a method for identifying a pseudo node according to Embodiment 1 of the present invention
  • FIG. 2 is a partial diagram of a network topology of a method for identifying a pseudo node according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic flowchart of a method for identifying a pseudo node according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a pseudo node identification apparatus according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a pseudo node identification apparatus according to Embodiment 2 of the present invention.
  • the method for identifying the pseudo node in the embodiment of the present invention may be applied to the same when the protocol interface identifiers of the multiple interfaces of the first intermediate system are the same, wherein the first intermediate system may be a router, a switch, or an ISIS protocol device.
  • the pseudo node identification method provided in this embodiment may be implemented by a pseudo node identification device, which may be integrated in a device of a router, a switch, or an ISIS protocol, or separately configured, where the pseudo node identification device may adopt software. And / or hardware to achieve.
  • the pseudo node identification method and apparatus provided in this embodiment are described in detail below.
  • FIG. 1 is a schematic flowchart diagram of a method for identifying a pseudo node according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method for identifying a pseudo node provided by this embodiment includes the following steps:
  • Step 101 The first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same.
  • the applicable scenario of this embodiment is in establishing a broadcast type neighbor environment.
  • the two interfaces include a first interface and a second interface, where the first intermediate system is connected to the third interface of the second intermediate system by using the first interface, and the first intermediate system passes The second interface is coupled to the fourth interface of the third intermediate system.
  • the first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same, for example, the protocol interface identifiers are all 0xFF.
  • Step 102 The first intermediate system sets a DIS election priority of the first interface to a lowest value according to a specified intermediate system (DIS) election rule, so that the second intermediate system is a designated intermediate for determining a pseudo node protocol identifier. system.
  • DIS intermediate system
  • the DIS election rule includes an intermediate system with a high election priority, and a specified intermediate system for determining a pseudo node protocol identifier, where the pseudo node is the first interface of the first intermediate system and the first A virtual node on a local area network (LAN) between the third interface of the second intermediate system to flood the generated pseudo node LSP.
  • LAN local area network
  • FIG. 2 is a partial diagram of a network topology of a pseudo node identification method according to Embodiment 1 of the present invention.
  • the first intermediate system R1 and the first intermediate system R2 establish a broadcast type neighbor relationship on the LAN network, that is, the first interface and the first interface of the first intermediate system R1.
  • the third interface of the second intermediate system R2 establishes a neighbor relationship on the broadcast type interface.
  • the system identifier system-ID of the first intermediate system R1 is 1111.1111.1111
  • the system identifier system-ID of the second intermediate system R2 is 2222-222222.2222
  • the protocol interface identifier circuit-ID of the first interface of the first intermediate system R1 is 0xFF.
  • the protocol interface identifier circuit-ID of the third interface of the second intermediate system R2 is 0x01.
  • the first intermediate system R1 is further provided with a second interface, and the protocol interface identifier circuit-ID of the second interface is also 0xFF.
  • the election priority of all interfaces is the default configuration of 64.
  • the protocol of the pseudo interface on the first interface and the second interface are the system-ID of the first intermediate system R1: 1111.1111.1111 plus the circuit-ID of the interface: 0xFF, that is, 1111.1111.1111.FF.
  • the LANs on the first interface and the second interface have the same identity and conflicts occur. At this time, if generated for each pseudo node If the same LSP is received, a network storm occurs and the topology calculation is concussed and incorrect.
  • the first intermediate system R1 is found on the first interface with the circuit ID of 0xFF.
  • the circuit-ID of the first interface is 0xFF, and the DIS election priority of the first interface is adjusted to 1.
  • the first intermediate system R1 is found on the first interface, and the configuration value of the interface priority is adjusted from 64 to The DIS is re-elected after 1 and the third interface of the second intermediate system R2 is also the default priority configuration value of 64.
  • the second intermediate system R2 eventually becomes the DIS on the first interface network.
  • the protocol identifier of the pseudo node of the LAN network is the system-ID of the second intermediate system R2: 2222.2222.2222 plus the circuit-ID of the third interface: 0x01, that is, 2222.2222.2222.01.
  • the LAN that causes the two pseudo nodes to collide can be correctly applied in data transmission.
  • the first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same, the two interfaces include a first interface and a second interface, and the first intermediate system passes the first interface and the second interface.
  • a third interface of the intermediate system is connected, the first intermediate system is connected to the fourth interface of the third intermediate system by using the second interface; the first intermediate system is configured to DIS of the first interface according to a DIS election rule
  • the election priority is set to a minimum value, so that the second intermediate system is a designated intermediate system that determines a pseudo node protocol identifier, and the DIS election rule includes an intermediate system with an interface election priority high to determine a designated intermediate of the pseudo node protocol identifier.
  • the system is a virtual node on a local area network (LAN) between a first interface of the first intermediate system and a third interface of the second intermediate system.
  • LAN local area network
  • FIG. 3 is a schematic flowchart of a method for identifying a pseudo node according to Embodiment 2 of the present invention. As shown in FIG. 3 and FIG. 2, the method for identifying a pseudo node provided in this embodiment includes the following steps:
  • Step 301 The first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same.
  • the two interfaces include a first interface and a second interface, where the first intermediate system is connected to the third interface of the second intermediate system by using the first interface, and the first intermediate system passes The second interface is coupled to the fourth interface of the third intermediate system.
  • Step 302 The first intermediate system sets the DIS election priority of the first interface to a lowest value according to the DIS election rule, so that the second intermediate system is a finger that determines the pseudo node protocol identifier. Set the intermediate system.
  • the DIS election rule includes an intermediate system with a high election priority, and a specified intermediate system for determining a pseudo node protocol identifier, where the pseudo node is the first interface of the first intermediate system and the first A virtual node on a local area network (LAN) between the third interfaces of the two intermediate systems.
  • LAN local area network
  • Step 303 The first intermediate system determines that the first DIS election priority is equal to the third DIS election priority.
  • the first DIS election priority includes a DIS election priority of the first interface of the first intermediate system
  • the third DIS election priority includes a DIS of the third interface of the second intermediate system. Election priority.
  • Step 304 The first intermediate system determines, according to the DIS election priority, that the first intermediate system itself is a designated intermediate system that determines the pseudo node protocol identifier.
  • Step 305 The first intermediate system determines, according to the DIS election priority, that the first DIS election priority is equal to the second DIS election priority.
  • the second DIS election priority includes a DIS election priority of the second interface of the first intermediate system.
  • Step 306 The first intermediate system determines, according to the device interface index value of the first interface and the device interface index value of the second interface, that the interface with the smallest interface index value is an interface that determines the pseudo node protocol identifier.
  • the applicable scenario of this embodiment is: in the partial view shown in FIG. 2, the first intermediate system R1, the second intermediate system R2, and the third intermediate system R3 establish a broadcast type neighbor relationship on the LAN network. That is, the first interface of the first intermediate system R1 and the third interface of the second intermediate system R2 establish a neighbor relationship on the broadcast type interface; the second interface of the first intermediate system R1 and the fourth interface of the third intermediate system R3 are A neighbor relationship is established on the broadcast type interface.
  • the system identifier system-ID of the first intermediate system R1 is 1111.1111.1111
  • the system identifier system-ID of the second intermediate system R2 is 2222-222222.2222
  • the system identifier system-ID of the third intermediate system R3 is 3333.3333.3333
  • the first The circuit-ID of the first interface of the intermediate system R1 is 0xFF
  • the circuit-ID of the second interface of the first intermediate system R1 is also 0xFF
  • the circuit-ID of the third interface of the second intermediate system R2 is 0x01.
  • the interface priority is configured to 1.
  • the first intermediate system R1 finds the first interface on the first interface with the circuit ID of 0xFF. If the circuit-ID is 0xFF, the DIS election priority of the first interface is adjusted to 1. In this case, the first intermediate system R1 is on the first interface, and the configuration priority of the interface is 1 and does not need to be re-elected.
  • the third interface of the second intermediate system R2 is also the default priority configuration value of 1.
  • the device interface index value of the first interface of the first intermediate system R1 is larger than the device interface index value of the second interface of the first intermediate system R1, and the first intermediate system R1 is finally the DIS on the first interface network, but cannot Become the interface of the pseudonode protocol identifier.
  • the pseudo node is the system-ID of the first intermediate system R1: 1111.1111.1111 plus the circuit-ID of the second interface: 0xFF, that is, 1111.1111 .1111.FF.
  • the method may further include:
  • the first intermediate system sends a hello message to the second intermediate system, so that the second intermediate system determines the protocol identifier of the pseudo node according to the DIS election priority carried in the neighbor message,
  • the neighbor message includes information that the DIS election priority of the first interface is set to the lowest value.
  • the method may further include:
  • the first intermediate system acquires a link state protocol data packet, where the link state protocol data packet includes at least one of the following or a combination thereof: link state information of the first intermediate system, or Link status information.
  • the method further includes:
  • the first intermediate system transmits the link state protocol data packet through an interface indicated by the protocol interface identifier.
  • FIG. 4 is a schematic structural diagram of a pseudo node identification apparatus according to Embodiment 1 of the present invention.
  • the pseudo node identification device includes: a determination module 41 and a setting module 42. among them,
  • the determining module 41 is configured to determine that the protocol interface identifiers of the at least two interfaces are the same, wherein the two interfaces include a first interface and a second interface, and the first intermediate system passes the first interface and the second intermediate system a third interface connection, wherein the first intermediate system is connected to the fourth interface of the third intermediate system through the second interface;
  • the setting module 42 is configured to set the DIS election priority of the first interface to a lowest value according to the DIS election rule, so that the second intermediate system is a designated intermediate system for determining a pseudo node protocol identifier, where
  • the DIS election rule includes an intermediate system with an interface election priority being a specified intermediate system for determining a pseudo node protocol identifier, and the pseudo node is a first interface of the first intermediate system and a third interface of the second intermediate system.
  • the first intermediate system determines that the protocol interface identifiers of the at least two interfaces are the same, the two interfaces include a first interface and a second interface, and the first intermediate system passes the first interface and the second interface.
  • a third interface of the intermediate system is connected, the first intermediate system is connected to the fourth interface of the third intermediate system by using the second interface; the first intermediate system is configured to DIS of the first interface according to a DIS election rule
  • the election priority is set to a lowest value, so that the second intermediate system is a designated intermediate system that determines a pseudo node protocol identifier, and the DIS election rule includes an intermediate system with an interface election priority being an intermediate system for determining a pseudo node protocol identifier.
  • the pseudo node is a virtual node on a local area network (LAN) connected between the first interface of the first intermediate system and the third interface of the second intermediate system.
  • LAN local area network
  • the determining module 41 is further configured to determine that the first DIS election priority is equal to the third DIS election priority, where the first DIS election priority includes the first intermediate system.
  • the first DIS election priority includes the first intermediate system.
  • the third DIS election priority includes a DIS election priority of the third interface of the second intermediate system; a first interface of the first intermediate system and a second intermediate system
  • the intermediate system with a large MAC address of the three interfaces is elected as the designated intermediate system of the pseudo node protocol identifier.
  • the determining module 41 is further configured to: according to Determining, by the device interface index value of the first interface, the device interface index value of the second interface, determining that the interface with the smallest interface index value is an interface that determines a pseudo node protocol identifier; and the interface with the smallest interface index value Create a pseudonode on the connected LAN.
  • FIG. 5 is a schematic structural diagram of a pseudo node identification apparatus according to Embodiment 2 of the present invention. As shown in Figure 5, on the basis of the above embodiment, the device may further include: a transmitting module 43;
  • the sending module 43 is configured to: send a hello message to the second intermediate system, so that the second intermediate system determines the protocol identifier of the pseudo node according to the DIS election priority carried in the neighbor message.
  • the hello message includes information that the DIS election priority of the first interface is set to a lowest value.
  • the device may further include: an obtaining module 44;
  • the obtaining module 44 is configured to acquire a link state protocol data packet, where the link state protocol data packet includes at least one of the following or a combination thereof: link state information of the first intermediate system, or, The link state information of the two intermediate systems.
  • the sending module 43 is further configured to send the link state protocol data packet by using an interface indicated by the protocol interface identifier.
  • an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and the pseudo node identification method is implemented when the computer executable instructions are executed.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the embodiment of the invention provides a method and a device for identifying a pseudo node, which avoids multiple identical protocol identifiers in a local area network, thereby improving the accuracy of topology calculation and reducing data traffic discarding.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé d'identification de pseudo-nœud qui comprend ce qui suit : un premier système intermédiaire détermine que des identifiants d'interface de protocole d'au moins deux interfaces sont identiques, les deux interfaces comprenant une première interface et une deuxième interface, le premier système intermédiaire étant connecté à une troisième interface d'un deuxième système intermédiaire au moyen de la première interface, et le premier système intermédiaire étant connecté à une quatrième interface d'un troisième système intermédiaire au moyen de la deuxième interface ; et le premier système intermédiaire règle, selon une réglementation d'élection de système intermédiaire désigné (DIS), une priorité d'élection DIS de la première interface en tant que valeur minimale, de telle sorte que le deuxième système intermédiaire soit un système intermédiaire désigné pour déterminer un identifiant de protocole de pseudo-nœud. Le procédé évite l'apparition d'une pluralité d'identificateurs de protocole identiques dans un réseau local, ainsi améliorant le taux de précision de calcul topologique, et réduisant en outre le rejet de trafic de données.
PCT/CN2016/081893 2015-09-06 2016-05-12 Procédé et appareil d'identification de pseudo-nœud WO2017036176A1 (fr)

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