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WO2011147312A1 - Procédé, dispositif et système de sauvegarde de port d'un routeur d'accès au service - Google Patents

Procédé, dispositif et système de sauvegarde de port d'un routeur d'accès au service Download PDF

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Publication number
WO2011147312A1
WO2011147312A1 PCT/CN2011/074638 CN2011074638W WO2011147312A1 WO 2011147312 A1 WO2011147312 A1 WO 2011147312A1 CN 2011074638 W CN2011074638 W CN 2011074638W WO 2011147312 A1 WO2011147312 A1 WO 2011147312A1
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WO
WIPO (PCT)
Prior art keywords
port
standby
message
user
service access
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2011/074638
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English (en)
Chinese (zh)
Inventor
屠朝艳
洪创业
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ZTE Corp
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ZTE Corp
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Publication date
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Publication of WO2011147312A1 publication Critical patent/WO2011147312A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • H04L12/287—Remote access server, e.g. BRAS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • 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

Definitions

  • the present invention relates to the field of data communication technologies, and in particular, to a port backup method, apparatus, and system for a service access router. Background technique
  • the BRAS Broadband Remote Access Server
  • PPPoE Point-to-Point Protocol over Ethernet
  • the requesting online message is a broadcast message, and multiple ports of the same BRAS device or even multiple BRAS devices can receive the message, and in response to the user's request, the client selects the BRAS device as the gateway according to the first received response message.
  • the user After the failure of the BRAS device as the gateway, the user redials the dial, and as long as the existing BRAS device can respond, the client can reselect one device as the gateway, and the service can continue.
  • the user has a large randomness in selecting the BRAS device.
  • the solution cannot control which device and which port the user accesses, and each port of the BRAS device can receive the request access message, and must process and send the message to the user. The response is answered, thus increasing the burden on the device.
  • VRRP Virtual Router Redundancy Protocol
  • IP addresses IP addresses.
  • VRRP Virtual Router Redundancy Protocol
  • the interfaces are set to the same backup group, and port backup between the same device cannot be achieved.
  • a cold backup of the device requires two BRAS devices with the same hardware and software configuration.
  • the BRAS device fails, the uplink and downlink cables are cut to the standby device.
  • the disadvantages are: high cost, and can not solve the backup when some ports fail. It requires manual operation and poor real-time performance. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a port backup method, device and system for a service access router, which can implement port backup inside the service access router and port backup between the service access routers.
  • a port backup method for a service access router includes:
  • the port role is the primary port or the standby port.
  • the primary port is initially used.
  • Status, the alternate port is initially in the standby state;
  • the process of synchronizing the working status of the active port to the standby port includes: the primary port periodically sends an advertisement packet to the standby port, and if the backup port receives the advertisement packet sent by the primary port within the set time, The master port is normal. If the slave port does not receive the advertisement packet from the master port within the set time, the master port is abnormal.
  • the user message includes: a user request message and a user data message;
  • the process of processing the received user packet according to the port role and the port state includes:
  • the primary port When the primary port receives the user request packet or the user data packet, it forwards it to the corresponding module for processing; when the standby port receives the user request packet, it determines whether the standby port is in the standby state or the active state, and if it is in the standby state, Discard the user request packet. If it is the active state, it will be transferred. Send to the corresponding module processing;
  • the standby port When receiving the user data packet, the standby port forwards the user data packet to the corresponding module for processing.
  • the method further includes: when the standby port re-receives the advertisement packet sent by the primary port, the standby port switches back to the standby state.
  • the invention also provides a port backup device for a service access router, comprising:
  • a configuration module configured to receive configuration information related to the backup performed by the user, where the configuration information includes a backup group and a port role, and the port role is a primary port or an alternate port;
  • the configuration information is used to synchronize the working status of the active port to the standby port, and when the primary port is abnormal, the standby port is switched to the active state;
  • the message interface module is configured to process the received message according to the configuration information.
  • the protocol processing module is further configured to send an advertisement message to the message interface module through the primary port, or receive the advertisement message reported by the message interface module through the standby port.
  • the protocol processing module is further configured to: when it is determined that the standby port receives the notification text within the set time, it is determined that the primary port is normal;
  • the standby port When it is determined that the standby port does not receive the advertisement packet within the set time, it is notified that the active port is abnormal, and the standby port is switched to the active state.
  • the message includes: a user message and/or an advertisement message, where the user message includes: a user request message and a user data message;
  • the packet interface module is further configured to: when any port in the backup group receives the user request packet, determine whether the port is in the active state or the standby state, and if the standby state is in the standby state, discard the user request packet. If it is the active state, it is forwarded to the corresponding module for processing;
  • any port in the VRRP group When any port in the VRRP group receives the user data packet, it forwards it to the corresponding module for processing.
  • the standby port When the standby port receives the advertisement packet, it transparently transmits the advertisement packet to the protocol processing module.
  • the protocol processing module is further configured to: when the standby port receives the advertisement packet sent by the active port, switch the standby port back to the standby state.
  • the present invention also provides a port backup system for a service access router, comprising: a first service access router with an active port and a second service access router with a standby port, wherein the first service access router :
  • the first configuration module is configured to receive the primary configuration information related to the backup performed by the user on the primary port, where the primary configuration information includes: a backup group and an active state;
  • a first protocol processing module configured to periodically send an advertisement message to the standby port by using the first message interface module
  • a first message interface module configured to process, according to the primary configuration information, a user text received by the primary port
  • the second service access router includes:
  • a second configuration module configured to receive standby configuration information related to the backup performed by the user on the standby port, where the standby configuration information includes: a backup group and standby status information;
  • the second protocol processing module is configured to receive, by using the second packet interface module, the advertisement packet sent from the primary port, and switch the standby port to the active state when the primary port is abnormal;
  • the second message interface module is configured to process, according to the standby configuration information, the user text and the advertisement received by the standby port.
  • the second protocol processing module is further configured to switch the standby port to the active state when it is determined that the standby port does not receive the advertisement packet within the set time;
  • the standby port When the standby port receives the advertisement packet from the primary port again, the standby port is switched back to the standby state.
  • the user message includes: a user request message and a user data message;
  • the first message interface module is further configured to: when the primary port receives the user request message or When the user data message is sent, it is forwarded to the corresponding module for processing;
  • the second packet interface module is further configured to: when the standby port receives the user request packet, determine whether the standby port is in the standby state or the active state, and if the standby port is in the standby state, discard the user request packet, if the primary message is used Status, then forwarded to the corresponding module for processing;
  • the standby port When the standby port receives the user data packet, it forwards it to the corresponding module for processing;
  • the standby port When the standby port receives the advertisement packet, it transparently transmits the advertisement packet to the second protocol processing module.
  • the present invention has at least the following advantages:
  • the port backup method, device and system for the service access router of the present invention configure a backup group and a port role for the port of the service access router; and process the user received by the primary port and the standby port respectively;
  • the standby port synchronizes the working status of the active port.
  • the standby port is switched to the active state to ensure that the user's service can continue.
  • the multi-access, multicast, and broadcast local area network can be implemented by using the technical solution of the present invention.
  • the service access in the Ethernet environment accesses the user port backup in the router device or between the devices, improves port selection controllability, and improves device efficiency. Reduce costs and have good practical application value.
  • FIG. 1 is a flow chart of a port backup method for a service access router according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a network structure of a port backup in a same BRAS device according to the present invention
  • FIG. 3 is a flow chart of a port backup method for a service access router according to a second embodiment of the present invention
  • FIG. 4 is a schematic diagram of a network structure of a port backup between three BRAS devices according to the present invention
  • FIG. 5 is a flow chart of a port backup method for a service access router according to a third embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a port backup device of a service access router according to the fourth and fifth embodiments of the present invention
  • FIG. 7 is a schematic structural diagram of a port backup system of a service access router according to a sixth embodiment of the present invention. detailed description
  • a port backup method for a service access router includes the following steps:
  • Step S101 Perform backup-related configuration on multiple ports of a service access router or multiple ports between multiple service access routers, and the configuration information includes: a backup group and a port role, and the port role is a master port. Or the alternate port, the primary port is initially in the active state, and the standby port is initially in the standby state.
  • Step S102 When receiving the user request packet or the user data packet, the active port forwards the processing to the corresponding module.
  • Step S103 The primary port periodically sends an advertisement packet to the standby port. If the backup port receives the advertisement packet sent by the primary port within the set time, the master port is normal, if the backup port is set. If the advertisement packet sent by the active port is not received within the time, the master port is abnormal.
  • Step S104 When the primary port is abnormal, the standby port automatically switches to the active state.
  • step S105 when the standby port receives the user request packet, it determines whether the standby port is in the standby state or the active state. If the standby port is in the standby state, the user requests the packet to be discarded, and if it is in the active state, it is forwarded to the corresponding module. deal with.
  • the standby port forwards the user data packet to the corresponding module for processing.
  • the method further comprises:
  • Step S106 When the standby port re-receives the advertisement packet sent by the active port, it will prepare The port is switched back to the standby state. At this time, the standby port does not process the received user request packet, but when it receives the user data packet, it still forwards it to the corresponding module for processing. After the user accesses the network through a port, the user data packet sent by the user terminal will continue to be sent to the port in unicast mode. Therefore, if the standby port is in the active state or the standby state, if the user data is received. The packets are forwarded to the corresponding module for processing, so that the service will not be interrupted when the standby port is switched back to the standby state.
  • Figure 2 is a schematic diagram of the networking structure when a port in a BRAS device is backed up. A BRAS device is connected to the user through the switch.
  • the port backup method of the service access router includes the following specific steps:
  • the first backup group group-id 1 (group-id 1 ) is configured on the first port 1 of the BRAS device, and the first port 1 is configured as a master port, that is, initially in the active state.
  • the second port 2 is also configured into the first backup group group-id 1, and the second port 2 is configured as a slave port, that is, initially in a standby state.
  • Configure the send notification for the first port 1 to the interval tl, tl l ⁇ 255 seconds, and the default setting is 20 seconds.
  • Configure the longest wait notification packet timeout time t2 for the second port 2, t2 l ⁇ 255 seconds, and the default setting is 60 seconds.
  • set t2 to 3 times the time of tl, on the first port 1 and the second port. 2 other configuration data is the same.
  • the specific process is: Enter the port configuration mode, the command format is: asrp group-id ⁇ 1-255> ⁇ master
  • the backup method of the present invention is different from other existing protocols; ⁇ 1-255> is a backup group number range; ⁇ master I slave ⁇ is optional, and the role is to set the port as a primary port or an alternate port. If the port is configured as the primary port in the first backup group group-id 1, the configuration method is as follows: asrp group-id 1 master warmth At this time, the first port 1 and the second port 2 have been set to the same backup group, and are respectively assigned to the primary and backup roles. Configure a backup group on any port. That is, the backup function is enabled on the port.
  • Step S202 The first port 1 sends a notification message to the second port 2 at a time interval of tl, and is used to notify the second port 2 that the first port 1 as the primary port is still in a normal working state.
  • the principle is: if the second port 2 receives the advertisement packet sent by the first port 1 in the longest waiting packet timeout time t2, it is learned that the first port 1 is still in the normal working state, if the second port 2 is in the If the notification message sent by the first port 1 is not received within the maximum waiting time notification period 2, the first port 1 is abnormal.
  • Step S203 The user dials, and the user request message sent by the broadcast is forwarded to the port of the BRAS device by the switch, and the first port 1 responds immediately after receiving the user request message, and sends a response to the user, and the user passes the first port. 1 Accessing the network, at the same time, the second port 2 also receives the user request packet and discards it directly.
  • Step S204 the first port 1 is abnormal, and the second port 2 is switched to the active state.
  • Step S205 The user re-diaches or adds a new user dial, and the second port 2 responds to the user. The user accesses the network through the second port 2.
  • step S206 the first port 1 is restored to the normal state, and the second port 2 is sent to the second port 2, and the second port 2 detects the notification of the first port 1, and then switches back to the standby state.
  • the user accessing the network is reserved, that is, the user data message is still forwarded to the corresponding module of the BRAS device through the second port 2.
  • Step S207 the new user dials, and can still only access the network from the first port 1.
  • the fifth port 5 and the seventh port 7 are configured as the primary and backup interfaces in the second backup group group-id 2, and the working principle is the same as the steps S201 to S207.
  • Figure 4 is a schematic diagram of the networking structure when the ports of the three BRAS devices are backed up.
  • the three BRAS devices are connected to the user through a switch.
  • the port backup method of the service access router includes the following specific steps:
  • Step S301 the first backup group group-id 1 is configured on the first port a1 of the first BRAS device si, and the first port a1 is configured as a primary port, and the third port b3 of the second BRAS device s2 is also configured.
  • the first backup group is set to the standby state, and the initial state of the third port b3 is set to the standby state.
  • t2 is set to 3 times the time of t1, at the first port a1 and the third port b3.
  • the other configuration data is the same.
  • Step S302 the first port al sends a notification message to the third port b3 at a time interval of tl, and is used to notify the third port b3 that the first port al as the primary port is still in a normal working state.
  • the principle is: if the third port b3 receives the notification>3 ⁇ 4 text sent by the first port a within the set time t2, it is learned that the first port a1 is still in the normal working state, if the third port b3 is in the set state If the advertisement packet sent by the first port a is not received in the time t2, it can be known that the first port a has an abnormality.
  • Step S303 the user dials, and the user request message sent by the broadcast is forwarded to the port of the three BRAS devices by the switch, and the first port a responds immediately after receiving the user request message, and sends a response to the user, and the user passes the A port is connected to the network.
  • the third port b3 also receives the user request packet and discards it directly.
  • Step S304 an abnormality occurs in the first port al, and the third port b3 is switched to the active state.
  • Step S305 the user re-diaches or adds a new user dial, and the third port b3 responds to the user. The user accesses the network through the third port b3.
  • Step S306 the first port a returns to normal, and immediately sends an announcement to the third port b3, and the third port b3 detects the notification of the first port a, and then switches back to the standby state. At this time, the third port has passed.
  • the user of the b3 access network is reserved, that is, the user is still passed through the third port b3.
  • the data message is forwarded to the corresponding module of the second BRAS device s2 for processing.
  • Step S307 the new user dials, and can only access the network from the first port al.
  • the second port b2 of the second BRAS device and the second port c2 of the third BRAS device are respectively configured as the primary and backup interfaces in the second backup group group-id 2, and the working principle is the same as the steps.
  • a port backup device for a service access router includes a configuration module, a protocol processing module, and a message interface module.
  • the configuration module is configured to accept the backup-related configuration of the port, including configuring the backup group and port role, and the port role as the primary port or the alternate port.
  • the protocol processing module is configured to periodically send an advertisement message to the message interface module through the primary port, or receive the advertisement message reported by the message interface module through the standby port.
  • the standby port is switched to the active state.
  • the method for the protocol processing module to determine whether the primary port is normal is as follows: If it is determined that the standby port receives the advertisement packet within the set time, the primary port is normal; if it is determined that the backup port is not received within the set time The notification to the advertisement packet indicates that the primary port is abnormal.
  • the protocol processing module performs MD5 (Message-Digest) on the sent announcement message.
  • MD5 Message-Digest
  • Algorithm5 Encryption, correspondingly, when the advertisement packet is received, it is also decrypted. This prevents the advertisement packet from being intercepted, parsed, and sent maliciously, which affects the normal operation of the port.
  • the message interface module is connected to the port, and is configured to: when the primary port or the standby port receives the user request packet, determine whether the port is in the active state or the standby state, and if the standby state is in the standby state, discard the user request packet. If it is the main state, it is forwarded to the corresponding module for processing;
  • the primary port or the standby port When the primary port or the standby port receives the user data packet, it forwards it to the corresponding module for processing.
  • the standby port When the standby port receives the advertisement packet, it transparently transmits the advertisement packet to the protocol processing module.
  • An advantage of the present invention is that the packet interface module determines whether to discard the user request packet, reduces the upper layer service load, and improves the device performance.
  • a port backup device of a service access router is substantially the same as that of the fourth embodiment. The difference is that, in this embodiment, the protocol processing module is further configured to: After the switch is switched to the standby state, the standby port switches back to the standby state when it receives the advertisement packet from the active port.
  • a port backup system for a service access router includes: a first service access router with an A port and a second service access router with a B port, among them,
  • the first service access router includes:
  • the first configuration module is configured to receive the primary configuration information related to the backup performed by the user on the A port, where the primary configuration information includes: a backup group and an active state;
  • a first protocol processing module configured to periodically send an advertisement message to the B port by using the first message interface module
  • the first message interface module is configured to forward to the corresponding module when the A port receives the user request message or the user data message;
  • the second service access router includes:
  • a second configuration module configured to receive backup configuration information related to the backup performed by the user on the B port, where the standby configuration information includes: a backup group and a standby state;
  • the second protocol processing module is configured to receive, by using the second packet interface module, the advertisement packet sent from the A port, and determine that the B port does not receive the advertisement packet within the set time, indicating that the A port is abnormal, The B port is switched to the standby state; when the B port re-receives the notification sent by the A port, the B port is switched back to the standby state;
  • the second packet interface module is configured to: when the B port receives the user request packet, determine whether the B port is in the standby state or the active state, and if the standby port is in the standby state, discard the user request packet, if the primary state is used, Forwarded to the corresponding module for processing;
  • the B port When the B port receives the user data file, it forwards it to the corresponding module for processing; When the B port receives the advertisement packet, it transparently transmits the advertisement packet to the second protocol processing module.
  • the port backup method, device and system for the service access router of the present invention ensure that the user's service can continue when the primary port is abnormal. Compared with the prior art, the IP address is not required to be configured, and the port level backup in the device can be implemented. The controllability of the user access is improved, the device burden is reduced, and the device performance is improved. After an abnormality occurs, the user re-diales, and the service automatically Switching to the alternate port does not require manual intervention; unlike the physical nature of the port, different types of ports can work in the same backup group, reducing the limitations of device backup.

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

Abstract

La présente invention se rapporte à un procédé, à un dispositif et à un système de sauvegarde de port d'un routeur d'accès au service. Le procédé comprend les étapes consistant à : configurer des groupes de sauvegarde et des rôles de port des multiples ports internes d'un routeur d'accès au service ou des multiples ports entre de multiples routeurs d'accès au service, le rôle de port étant un port principal ou un port de secours, le port principal étant au début dans un état principal et le port de secours étant au début dans un état de secours ; traiter les messages d'utilisateur reçus selon les rôles de port et l'état de port ; synchroniser l'état de travail du port principal avec le port de secours et lorsque le port principal est anormal, commuter le port de secours vers l'état principal. En utilisant la présente invention, il est possible de mettre en application non seulement la sauvegarde de port à l'intérieur du routeur d'accès au service mais également la sauvegarde de port entre les routeurs d'accès au service.
PCT/CN2011/074638 2010-05-26 2011-05-25 Procédé, dispositif et système de sauvegarde de port d'un routeur d'accès au service Ceased WO2011147312A1 (fr)

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CN201010183082A CN101841432A (zh) 2010-05-26 2010-05-26 一种业务接入路由器的端口备份方法、装置和系统

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