WO2010000158A1 - Procédé, équipement et système de contrôle d'état de chemin - Google Patents

Procédé, équipement et système de contrôle d'état de chemin Download PDF

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Publication number
WO2010000158A1
WO2010000158A1 PCT/CN2009/071881 CN2009071881W WO2010000158A1 WO 2010000158 A1 WO2010000158 A1 WO 2010000158A1 CN 2009071881 W CN2009071881 W CN 2009071881W WO 2010000158 A1 WO2010000158 A1 WO 2010000158A1
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Prior art keywords
network port
address
path
backup network
detection packet
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PCT/CN2009/071881
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English (en)
Chinese (zh)
Inventor
袁学文
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华为技术有限公司
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Publication of WO2010000158A1 publication Critical patent/WO2010000158A1/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
    • 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
    • H04L45/70—Routing based on monitoring results

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for path state detection.
  • the communication device in order to increase the reliability of the system, the communication device usually configures the primary backup network port.
  • a device configured as the backup network port has the same IP address of the primary and backup network ports.
  • the address resolution protocol (ARP, Address Resolution) can be adopted.
  • the IP address of the backup network port is disabled.
  • the backup network port cannot send IP packets and ARP packets, and the packets are not received.
  • the standby network port is enabled.
  • MSC Mobile Switching Center
  • IMS Multimedia Subsystem
  • IMS Intersystem Messaging
  • HSS Home Subscriber Server
  • DNS Domain Name System
  • Service network elements such as System
  • DPU Distribution Processing unit
  • the primary and backup modules are networked and have a primary backup network port, and the media gateway that controls the control (MG, also called M
  • SGSN Serving GPRS Support Node
  • other products are also connected to the gateway using the active and standby interface modes.
  • the maintenance operation protocol, and the network layer uses ARP or Bidirection al Forwarding Detection (BFD) to detect.
  • ARP Bidirection al Forwarding Detection
  • the prior art finds that the network layer detection of the primary network port path can send a normal ARP request packet and request the ARP according to the peer device. The response of the message is judged. If the peer device does not answer, the path is considered faulty. However, this method cannot be applied to the path state detection of the standby network port. If the backup network port also sends a normal ARP request packet, the peer device will respond to the ARP request packet, but the ARP request packet will be refreshed.
  • the ARP cache table of the end device replaces the MAC address of the primary network port with the MAC address of the standby network port, that is, the path that points to the primary network port is changed to the path that points to the backup network port, that is, the current service is changed. Path, but the standby network port is in the standby state and does not receive packets. This will cause the system to fail to receive packets and cause a fault. Similar problems exist with the BFD protocol. Unless the backup network port uses another dedicated probe IP address to detect, this method will increase the IP address credit, increase the possibility of IP address conflict, and solve the problem of IP address selection. Adopted.
  • the network device based on the active and standby network ports does not have the network layer detection mechanism of the standby network port, but the default is that the standby network port is normal. If the fault occurs on the network layer of the standby network port, the primary and backup network ports will be switched back and forth, which affects the reliability of the system.
  • the embodiments of the present invention are directed to a method, a device, and a system for detecting a path state of a primary backup network port device.
  • the embodiment of the invention discloses a path state detection method, which includes:
  • [12] Sending a detection packet for detecting the path status of the backup network port of the primary backup network port device, where the source IP address in the detection packet is a preset IP address not used for communication, and the preset IP address is used for And the receiving device that indicates the detection packet does not change the current service path, where the current service path is the receiving device and the main Current service path of the standby network port device;
  • a path state detecting device is also disclosed in the embodiment of the present invention, including:
  • the sending unit is configured to send a detection packet that detects the path status of the backup network port of the primary backup network port device, where the source IP address in the detection packet is a preset IP address that is not used for communication, and the preset IP address.
  • the address is used to indicate that the receiving device of the detection packet does not change the current service path, and the current service path is the current service path of the receiving device and the primary backup network port device;
  • the determining unit is configured to determine, according to whether the response message of the receiving device is received, whether the path between the backup network port of the primary backup network port device and the receiving device is faulty.
  • a path state detection system is also disclosed in the embodiment of the present invention, including:
  • the detecting device is configured to send a detection packet that detects the path status of the backup network port of the primary backup network port device, where the source IP address in the detection packet is a preset IP address that is not used for communication, and the preset IP address.
  • the address is used to indicate that the receiving device of the detection packet does not change the current service path, and the current service path is the current service path of the receiving device and the primary backup network port device, and according to whether the receiving device is received or not Returning a response message, determining whether a path between the backup network port of the primary backup network port device and the receiving device is faulty;
  • the receiving device is configured to receive the detection packet sent by the detecting device, and return a response message according to the detection packet.
  • the source IP address in the detection packet is configured as a preset IP address that is not used for communication, by sending a detection packet that detects the path status of the backup network port of the primary backup network port device. And not changing the current service path of the receiving device of the detection packet, so that the path state detection of the backup network port can be performed, and the state of the path of the backup network port of the primary backup network port device can be obtained, and the system is added. Reliability, and does not require the addition of a dedicated IP address of the backup network port, saving IP resources, increasing the possibility of IP address conflicts, and achieving simple and reliable path state detection.
  • FIG. 1 is a schematic flow chart of a path state detecting method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of another implementation manner of a path state detecting method according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a path state detecting apparatus according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of another implementation manner of a path state detecting device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a path state detecting system according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method, a device, and a system for detecting a path state of a backup network port of a network device of a primary and secondary network port, which cannot be implemented in the network layer, to detect a backup network.
  • the network layer path status of the interface prevents the primary and backup network ports from being switched back and forth after the network layer of the standby network port is faulty, which affects the reliability of the system.
  • the primary backup network port device in the embodiment of the present invention may be an MSC,
  • Service network elements such as CSCF, HSS, ATS, RM9900, MRF6600, CCF, and DNS in the IMS product family, such as MG products and SGSNs that carry control, as long as they are devices with primary and backup network ports, regardless of whether they support IPv4 devices.
  • the device supporting the IPv6 can be implemented according to the specific implementation manner of the embodiment of the present invention. The implementation process of the method in the embodiment of the present invention is described by taking the MSC supporting IPv4 as an example.
  • MSC passes through the primary network port and the media gateway (MGW, also known as MG, Media
  • the MSC may configure an ARP detection packet to be sent to the MGW.
  • the MGW After receiving the ARP detection packet, the MGW refreshes its own ARP cache table, that is, the active network port.
  • the MAC address is replaced with the MAC address of the standby network port, that is, the current service path of the MGW and the MSC is changed, and the standby network port of the MSC is in the standby state, and the packet is not received, which will result in the The MSC was unable to receive the message and failed.
  • the source IP address of the path detection packet is configured as a preset IP address that is not used for communication, and the MGW does not change the IP address of the MSC that is saved and the primary use without changing the existing network device.
  • the MAC address of the network port that is, the communication path with the MSC is not changed, so that the backup network port can determine whether the path between the backup network port and the MGW is normal according to whether the response message of the MGW is received, so that the path is normal.
  • Path state detection of the MSC backup network port is implemented.
  • FIG. 1 is a schematic flowchart of a path state detection method according to an embodiment of the present invention, including: [32] Step 104: Send a detection packet for detecting a path status of a backup network port of a primary backup network port device. , will The source IP address in the detection packet is configured as a preset IP address that is not used for communication, and the preset IP address is used to indicate that the receiving device of the detection packet does not change the current service path, and the current service path is Describe the current service path of the receiving device and the primary backup network port device;
  • the path state detection between the backup network port of the MSC and the MGW is specifically taken as an example.
  • the service here may be a control or data communication service.
  • the services of the primary backup network port device and other devices may also be service data such as voice and video, or short message or signaling.
  • the embodiment of the present invention does not limit its specific service form.
  • the primary network port and the backup network port are relative concepts.
  • the network port that is currently processing the service is called the primary network port, and the network port that does not process the service is called the backup network port. If the path of the port is faulty, you need to switch to the standby network port.
  • the previous backup network port becomes the active network port.
  • the previous active network port becomes the standby network port. That is, the backup network port and the primary network port can be converted to each other by switching.
  • the MSC After the MSC sends the detection packet of the path of the backup network port, the MSC can send the ARP packet.
  • the default IP address that is not used for communication can be the ' ⁇ . ⁇ . ⁇ . ⁇ ' address that supports IPV4.
  • the source IP address received by the network device is "0.0.0.0", and does not change its own ARP cache table, that is, the source MAC address of the MSC primary network port that will not be saved by itself.
  • the address is replaced with the source MAC address of the MSC backup network port, that is, the current service communication path between the MSC and the MGW is maintained.
  • the ARP cache table of the MGW is not affected, and the consumption of the AGW entry for the MGW is not increased.
  • the preset IP address is an IP address that is not used for communication, the IP address overhead is not increased, and the possibility of IP address conflict is avoided.
  • the other parameters of the ARP detection packet such as the destination media broadcast address, the source media address identifier, the frame type, and the hardware type, are the same as those in the prior art, and are not described herein.
  • the above-mentioned "0.0.0.0” is used as the preset IP address not used for communication.
  • other IP addresses not used for communication may be used, as long as such an IP address does not cause
  • the receiving end device of the detecting packet changes its current communication path with the peer device to be detected.
  • the MGW in the above embodiment does not change the communication path between the MGW and the MSC primary network port.
  • the ARP packet is used as the detection packet.
  • the packet can be detected by other packets.
  • the IPv6 primary and backup network port devices can be used. Inter-network control message protocol (ICMP, Internet Control Messages) with source IP address "::" in IPv6
  • ICMP Inter-network control message protocol
  • the embodiment of the present invention does not limit the specific format of the detection packet.
  • the "::” is a simplified representation of the IP address in IPV6, which is specifically "0000: 0000: 0000: 0000: 0000: 0000: 0000", that is, the IP address indicated by the "::” is " 0000: 000 0: 0000: 0000: 0000: 0000: 0000".
  • Step 106 Determine whether the path between the backup network port of the primary backup network port device and the receiving device is faulty according to whether the response message received by the receiving device is received.
  • the path between the MSC backup network port and the MGW is detected.
  • the MGW does not change its current service path with the MSC, and And returning the response message of the detection message according to the situation, the MSC or other device may determine, according to whether the response message returned by the MG W is received, whether the path between the MSC backup network port and the MGW is faulty.
  • the method Before the sending the detection packet for detecting the path status of the backup network port of the primary backup network port device, the method further includes the step of configuring the detection packet.
  • FIG. 2 is a schematic flow chart of another implementation manner of a path state detecting method according to an embodiment of the present invention.
  • the path state detecting method further includes:
  • Step 102 Configure a detection packet for detecting the path status of the backup network port of the primary and backup network port devices, and configure the source IP address of the detection packet as a preset IP address that is not used for communication.
  • the path state detection between the backup network port of the MSC and the MGW is specifically taken as an example.
  • the network device configured with the ARP packet may be the MSC device itself or other device than the MSC.
  • the specific device of the ARP packet is not limited in this embodiment of the present invention.
  • the IP address of "0.0.0.0" can be used as the preset IP address, that is, the source IP address of the detection packet is configured as " 0.0.0.0".
  • an IP address of "0000: 0000: 0000: 0000: 0000: 0000: 0000: 0000: 0000" can be used as the preset IP address.
  • the detection packet is sent by detecting the path status of the backup network port of the primary backup network port device.
  • the source IP address in the detection packet is configured as a preset IP address that is not used for communication, so that the receiving device of the detection packet does not change its current service path, that is, does not change the primary backup network port device.
  • the service path of the primary network port and the receiving device enables the path state detection of the backup network port to be performed, and the state of the path of the backup network port can be obtained, thereby increasing the reliability of the system, and no new increase is required.
  • the IP address of the dedicated standby network port saves IP resources and does not increase the possibility of IP address conflicts. It implements simple and reliable path state detection.
  • FIG. 3 is a schematic structural diagram of a path state detecting device according to an embodiment of the present invention, including: [49] a sending unit 204, configured to send a detection report for detecting a path state of a backup network port of a primary backup network port device.
  • the source IP address in the detection packet is a preset IP address that is not used for communication, and the preset IP address is used to indicate that the receiving device of the detection packet does not change the current service path, and the current service path The current service path of the receiving device and the primary backup network port device;
  • a specific implementation manner of the sending unit 204 is specifically described by taking the path state detection between the backup network port of the MSC and the MGW as an example.
  • the path state detecting device may be the MSC itself, or may be another device or an independent device.
  • the embodiment of the present invention does not limit its specific form.
  • the service here may be a control or data communication service.
  • the service of the primary backup network port device and other devices may also be services such as voice, video, or short message and signaling.
  • the embodiment of the invention does not limit its specific business form. It should be noted that the primary network port and the backup network port are relative concepts. The network port that is currently processing the service is called the primary network port. The network port that does not process the service is called the backup network port. If the path is faulty, you need to switch to the standby network port.
  • the previous backup network port becomes the primary network port.
  • the previous active network port becomes the standby network port. That is, the backup network port and the primary network port can be converted to each other through switching.
  • the sending unit 204 can be implemented by sending an ARP packet after transmitting the detection packet of the standby network port.
  • the preset IP address not used for communication may be an IP address supporting "0.0.0.0" of IPV4. According to the provisions of the existing protocol, the source IP address received by the network device is "0.0.0.0", and does not change its own ARP cache table, that is, the source MAC address of the MSC primary network port that will not be saved by itself.
  • the address is replaced with the source MAC address of the MSC backup network port, that is, the current service communication path between the MSC and the MGW is maintained. Since the foregoing method does not change the cache table of the MGW, the ARP cache table of the MGW is not affected, and the consumption of the AMG entry for the MGW is not increased. Moreover, since the preset IP address is an IP address that is not used for communication, the IP address credit is not increased, and the possibility of IP address conflict is avoided.
  • the above-mentioned "0.0.0.0” is used as the preset IP address not used for communication.
  • other IP addresses not used for communication can also be used, as long as such an IP address does not make
  • the receiving end device of the detecting packet changes its current communication path with the peer device to be detected.
  • the MGW in the above embodiment does not change the communication path between the MGW and the MSC primary network port.
  • the ARP packet is used as the detection packet.
  • the packet can be detected by other packets.
  • the IPv6 primary and backup network port devices can be used.
  • the detection packet of the ICMPv6 and the IPv6 source address is "::", and the path state detection is performed.
  • the embodiment of the present invention does not limit the specific format of the detection packet.
  • the determining unit 206 is configured to determine, according to whether the response message of the receiving device is received, whether the path between the backup network port of the primary backup network port device and the receiving device is faulty.
  • the determining unit 206 determines, according to the response message of the ARP detection packet sent by the sending unit 204, that the path between the MSC backup network port and the MGW is faulty.
  • FIG. 4 is a schematic structural diagram of another implementation manner of a path state detecting device according to an embodiment of the present invention.
  • the path detecting device further includes:
  • the configuration unit 202 is configured to configure a detection packet of the path status of the backup network port of the primary backup network port device, and configure the source IP address of the detection packet as a preset IP address that is not used for communication.
  • the IP address of "0.0.0.0” can be used as the preset IP address, that is, the source IP address of the detection packet is configured as "0.0.0.0";
  • an IP address of "000 0: 0000: 0000: 0000: 0000: 0000: 0000: 0000: 0000” can be used as the preset IP address.
  • the configuration unit 202 configures the detection message and sends the detection message to the sending unit 204.
  • the foregoing embodiment of the path state detecting device is configured to send, by using the sending unit 204, a detection packet that detects a path state of the backup network port of the primary backup network port device, where the source IP address in the detection packet is configured to be used for communication.
  • Presetting the IP address so that the receiving device of the detection packet does not change its current service path, that is, does not change the communication path between the active network port of the primary backup network port device and the receiving device, so that the The path state detection of the backup network port can be performed, and the state of the path of the backup network port can be obtained, and the reliability of the system is increased.
  • the preset IP address is a preset IP address that is not used for communication, there is no need to newly add.
  • the IP address of the dedicated standby network port saves IP resources and does not increase the possibility of IP address conflicts. It implements simple and reliable path state detection.
  • FIG. 5 is a schematic structural diagram of a path state detection system according to an embodiment of the present invention, including: [64] A detection device 302, configured to send a detection report for detecting a path state of a backup network port of a primary backup network port device.
  • the source IP address in the detection packet is a preset IP address that is not used for communication, and the preset IP address is used to indicate that the receiving device 304 of the detection packet does not change the current service path, and the current service
  • the path is the current service path of the receiving device 304 and the primary backup network port device, and the detecting device 302 sends the detection packet to the receiving device 304, and according to whether the response message returned by the receiving device 304 is received. Determining whether a path between the backup network port and the receiving device 304 is faulty;
  • the receiving device 304 is configured to receive the detection packet sent by the detecting device 302, and return a response message according to the detection packet.
  • the detecting device 302 may include a configuration unit, a sending unit, and a determining unit.
  • the configuration unit is configured to detect a detection packet of the path status of the backup network port of the primary backup network port device, and configure the source IP address in the detection packet as a preset IP address that is not used for communication, and the preset IP address.
  • the address is used to indicate that the receiving device 304 of the detection packet does not change the current service path, and the current service path is the current service path of the receiving device 304 and the primary backup network port device;
  • the sending unit is configured to send
  • the configuration unit configures the detection packet, and receives the response message of the receiving device 304.
  • the determining unit is configured to determine, according to whether the response message of the receiving device 304 is received, whether the path between the backup network port and the receiving device 304 is faulty.
  • the detecting device 302 may be the MSC itself, or may be another device or an independent device.
  • the specific form of existence is defined; the receiving device 304 can be the MGW.
  • the detection device 302 is configured to detect a detection packet of the path status of the backup network port of the primary backup network port device, and configure the source IP address in the detection packet to be not used.
  • the preset IP address of the communication so that the receiving device 304 of the detecting message does not change its current service path, that is, does not change the communication path between the active network port of the primary backup network port device and the receiving device 304.
  • the path state detection of the backup network port can be performed, and the state of the path of the backup network port can be known in time, and the reliability of the system is increased. Since the preset IP address is a preset IP address that is not used for communication, The IP address of the dedicated standby network port needs to be newly added, which saves IP resources and increases the possibility of IP address conflicts, and implements simple and reliable path state detection.

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Abstract

Procédé, équipement et système de contrôle d'état de chemin remédiant aux problèmes de l'art antérieur, qui ne permettait pas de détecter un chemin en état de veille dans une interface éthernet principale en veille. Après l'envoi d'un message de contrôle d'état du chemin en veille de l'interface éthernet principale en veille, l'adresse IP source dudit message étant configurée comme une adresse IP préréglée non utilisée dans les communications, le dispositif récepteur recevant ledit message ne change pas le chemin d'opérations et conserve donc les chemins de communication entre le dispositif récepteur et l'interface éthernet principale du dispositif éthernet principal en veille. Le contrôle de l'état de l'interface éthernet en veille peut être effectué, ceci fournissant ainsi rapidement des informations sur l'état du chemin de l'interface éthernet en veille, améliorant ainsi la fiabilité du système. L'interface éthernet en veille ne nécessite plus d'adresse IP de détection, les ressources IP sont économisées, tout en n'augmentant pas la probabilité de conflit d'adresses IP. Le contrôle de l'état du chemin est de ce fait rendu plus simple et plus fiable.
PCT/CN2009/071881 2008-07-02 2009-05-20 Procédé, équipement et système de contrôle d'état de chemin WO2010000158A1 (fr)

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CN1909472A (zh) * 2005-08-05 2007-02-07 华为技术有限公司 一种基于主、备pos接口的状态检测方法
CN101174977A (zh) * 2006-10-31 2008-05-07 中兴通讯股份有限公司 一种无线Ad hoc网络多媒体视频主备路径传输方法
CN101316234A (zh) * 2008-07-02 2008-12-03 华为技术有限公司 路径状态检测的方法、设备和系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018076908A1 (fr) * 2016-10-25 2018-05-03 中兴通讯股份有限公司 Procédé et dispositif de détection de trajet de secours
CN110175099A (zh) * 2019-04-15 2019-08-27 平安普惠企业管理有限公司 接口变动提示方法、装置、计算机设备及存储介质
CN110175099B (zh) * 2019-04-15 2023-02-03 平安普惠企业管理有限公司 接口变动提示方法、装置、计算机设备及存储介质

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