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WO2010020123A1 - Procédé, système de réseau et dispositif de périphérie de réseau pour reprendre la session ip - Google Patents

Procédé, système de réseau et dispositif de périphérie de réseau pour reprendre la session ip Download PDF

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Publication number
WO2010020123A1
WO2010020123A1 PCT/CN2009/071296 CN2009071296W WO2010020123A1 WO 2010020123 A1 WO2010020123 A1 WO 2010020123A1 CN 2009071296 W CN2009071296 W CN 2009071296W WO 2010020123 A1 WO2010020123 A1 WO 2010020123A1
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WO
WIPO (PCT)
Prior art keywords
session
dhcp client
dhcp
information
client
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/CN2009/071296
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English (en)
Chinese (zh)
Inventor
厉益舟
丁一兰
李春强
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
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Publication of WO2010020123A1 publication Critical patent/WO2010020123A1/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
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]

Definitions

  • the present invention relates to an IP network communication technology, and in particular, to a method, a network system, and a network edge device for restoring an IP session.
  • IP networks In order to better enable audio, video and data to be transmitted over the network through a unified transmission protocol, all-IP networks will be a common trend.
  • the architecture of the all-IP network in order to simplify the operation cost and reduce the complexity of user services, in the access network, operators are more and more inclined to use data packets directly to transmit data packets, the original point to Point-to-Point Protocol (PPP) sessions will be phased out. This requires managing the user's access session directly based on the user's IP address. This session based on the user's IP address can be called an IP session.
  • PPP Point-to-Point Protocol
  • An IP session represents a network access connection session associated with the IP address of a subscriber.
  • the IP session is usually terminated on the IP edge device. That is, the IP session is a session connection established between the user and the IP edge device.
  • the device includes a Broadband Network Gateway (BNG) or a Broadband Remote Access Server (BRAS).
  • BNG Broadband Network Gateway
  • BRAS Broadband Remote Access Server
  • the IP address of the user is a parameter for identifying the IP session and a key part of the authentication process.
  • the IP address is generally dynamically allocated by the DHCP server.
  • the IP address is used for network access management of the user, such as accounting and authentication. , status maintenance, etc.
  • IP sessions mainly include the establishment of sessions, the maintenance of sessions or state detection, and the termination of sessions.
  • IP sessions may be statically generated or dynamically generated. If it is a dynamically generated IP session, then the IP address of the configuration session is usually configured by Dynamic Host Configuration (Dynamic Host Configuration). Protocol, DHCP) to complete.
  • Dynamic Host Configuration Dynamic Host Configuration
  • Protocol, DHCP Dynamic Host Configuration
  • FIG. 1 a flow chart of a method for creating an IP session based on DHCP in the prior art. include:
  • the DHCP client sends a DHCP discovery message to its IP edge device.
  • the IP edge device After receiving the DHCP discovery message, the IP edge device sends the DHCP client to send an access request message to the AAA server.
  • the AAA server authenticates the DHCP client according to the received access request message, and sends an access confirmation message to the IP edge device after the authentication is passed.
  • the IP edge device After receiving the access confirmation message sent by the AAA server, the IP edge device performs an IP session authorization on the DHCP client, that is, the DHCP client can perform an IP session;
  • the IP edge device proxying the DHCP client forwards the DHCP discovery message to the DHCP server.
  • the DHCP server that receives the DHCP discovery message sends a DHCP Provide message (DHCPOFFER) in response to the DHCPDISCOVER.
  • DHCPOFFER DHCP Provide message
  • the DHCPOFFER message includes the available network address of the "yiaddr" domain and other DHCP options configuration parameters;
  • the DHCP client After receiving the response from multiple DHCP servers on the network, the DHCP client selects one of the DHCPOFFERs (usually the one that arrives first) and sends a DHCP request message (DHCPREQUEST) to the network, telling all DHCP servers that it will send it. Specify which server to accept the IP address;
  • the DHCP server selected by the DHCP client After receiving the DHCP request message from the client, the DHCP server selected by the DHCP client sends a DHCP acknowledgement message (DHCPACK) to the client to confirm that the IP lease is officially valid;
  • DHCPACK DHCP acknowledgement message
  • the IP session of the DHCP client is formally established.
  • IP session is started and ended by DHCP. As long as the DHCP lease is valid, the IP session will not end. If there is an error in the link, the IP session will enter the disabled state; the IP session can be enabled after the link is restored. status.
  • the embodiment of the invention provides a method for recovering an IP session, a network system and a network edge device, which solves the problem of recovery after the IP session enters the disabled state, thereby solving the process of the IP session from entering the disabled state to the recovery enabled state.
  • the billing problem in the middle avoids the theft of IP sessions.
  • the method for restoring an IP session in the embodiment of the present invention includes: receiving a packet sent by a DHCP client, and authenticating the DHCP client according to a preset policy when the IP session of the DHCP client is in a disabled state; After passing, the IP session of the DHCP client is restored.
  • the network system in the embodiment of the present invention includes: a network edge device and a DHCP client, where: the DHCP client is configured to send a packet, and the network edge device is configured to receive the packet sent by the DHCP client, and is in the DHCP client.
  • the DHCP client is authenticated according to the preset policy. After the authentication succeeds, the IP session of the DHCP client is restored.
  • the network edge device of the embodiment of the present invention includes: a receiving unit, configured to receive a packet sent by a DHCP client, and an authentication unit, configured to: when the IP session of the DHCP client is in a disabled state, to the DHCP client according to a preset policy The session is authenticated.
  • the session recovery unit is configured to restore the IP session of the DHCP client after the authentication unit successfully authenticates the DHCP client.
  • the embodiment of the present invention can implement the recovery of the IP session according to the preset policy when the IP session is disabled, thereby improving the accuracy of charging the DHCP client and the security of the system, and avoiding the theft of the IP session.
  • FIG. 1 is a flowchart of a method for creating an IP session based on DHCP in the prior art
  • Embodiment 2 is a flowchart of a method for detecting an IP session state according to Embodiment 1 of the present invention
  • 3 is a flowchart of a method for restoring an IP session in Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of a method for restoring an IP session according to Embodiment 3 of the present invention.
  • FIG. 5 is a flowchart of a method for restoring an IP session according to Embodiment 4 of the present invention.
  • FIG. 6 is a flowchart of a method for restoring an IP session according to Embodiment 5 of the present invention.
  • Figure ⁇ is a schematic structural diagram of a network system in an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a network edge device according to an embodiment of the present invention.
  • FIG. 2 it is a flowchart of a method for detecting an IP session state in Embodiment 1 of the present invention.
  • the method in this embodiment includes the following steps:
  • the IP session After the initialization is complete, the IP session enters an enabled state.
  • step 204 Determine whether the session is configured for online detection. If online detection is configured, perform step 204, otherwise end;
  • step 205 according to the detection result in step 204 to determine whether the connection of the IP session fails, and if so, step 206 is performed, otherwise, after the time set by the timer, step 204 is performed;
  • step 207 Determine, according to the detection result in step 207, whether the Layer 3 connection of the IP session is restored. If the Layer 3 connection of the IP session is not restored, after the timer is set, step 207 is performed; if the IP session is If the Layer 3 connection has been restored, the session is considered to be enabled, that is, the IP session is successfully restored.
  • FIG. 3 it is a flowchart of a method for restoring an IP session provided by Embodiment 2 of the present invention.
  • an edge network device such as a Broadband Network Gateway (BNG) or a broadband remote access server (BRAS).
  • BNG Broadband Network Gateway
  • BRAS broadband remote access server
  • Session information of the session the session information including a combination of one or more of an IP address, a MAC address, VLAN information, line information, and lease information.
  • the method includes:
  • the DHCP client is authenticated according to a preset policy, where the preset policy may be that the parameters of the session information of the IP session match or the DHCP client is heavily weighted. Certification
  • whether the IP session of the DHCP client is disabled can be detected by the method shown in FIG. 2 or other methods that can be conceived by those skilled in the art.
  • the parameter matching may be specifically performed according to the combination of one or more of the IP address, the MAC address, the VLAN information, the line information, and the lease carried in the packet, and the session information of the stored IP session on the edge network device. The corresponding information is matched.
  • Figures 4 through 6 are each a further extension of the embodiment shown in Figure 3. In order to make the solution more complete, Figure 4 to Figure 6 are all explained from the process after the IP session is successfully established.
  • FIG. 4 it is a flowchart of a method for restoring an IP session in Embodiment 3 of the present invention.
  • the method includes:
  • the IP network edge device (which may be a BNG or a BRAS) stores the session information of the IP session.
  • the session information of the IP session includes the IP address, MAC address, VLAN information, and line of the DHCP client. A combination of one or more of information and lease information.
  • An online detection mechanism is configured on the edge device of the IP network. As shown in FIG. 2, the IP session is in a disabled state periodically or according to an instruction. When the IP session is detected to be in a disabled state, the step is executed. Step 403.
  • the IP network edge device sends a first charging update request message to the AAA server for charging, and notifies the AAA server to suspend charging for the IP session.
  • the AAA server After receiving the first charging update request message, the AAA server returns a first charging update confirmation message to the IP edge device, and confirms that the DHCP client pauses charging for the IP session.
  • the DHCP client sends a packet to the edge device of the IP network while the IP session is disabled.
  • the packet may be a data packet or other form of packet.
  • the IP network edge device authenticates the DHCP client according to a preset policy after receiving the message sent by the DHCP client.
  • the authenticating the DHCP client includes: The network edge device compares the information (IP address, MAC address, IVLAN information, line information, and combination of one or more of the leases) of the packet with the session information of the stored IP session according to a preset parameter matching rule. The corresponding content is matched or the DHCP client is re-authenticated.
  • the IP network edge device determines whether the authentication of the DHCP client is successful. If the authentication fails, the packet is discarded, and the stored session information of the IP session of the DHCP client is deleted, and the IP session is terminated. Go to step 408.
  • the IP edge device restores the originally disabled IP session to an Enabled state and processes the received packet.
  • the IP network edge device sends a second charging update request message to the AAA server, to notify the AAA server to resume charging for the IP session.
  • the AAA server After receiving the second charging update request message sent by the IP network edge device, the AAA server returns a second charging update confirmation message to the IP edge device to confirm that the IP session is restored.
  • the above embodiment improves the DHCP client by configuring the IP session state detection mechanism and the DHCP client authentication mechanism on the IP network edge device, and notifying the AAA server as the accounting server to update the accounting information after the IP session enters the disabled state.
  • the accuracy of the end-of-line billing and the security of the system prevent the IP session from being stolen when it is converted from disabled to enabled.
  • FIG. 5 it is a flowchart of a method for restoring an IP session in Embodiment 4 of the present invention.
  • the steps of steps 501-504 are the same as those of steps 401-404, and details are not described herein again.
  • the method also includes:
  • the DHCP client sends a DHCP request message to the IP network edge device, where the DHCP request message carries an IP address allocated to the DHCP client before the IP session is established, and the DHCP request message indicates that the DHCP client wants to still use the allocation between the DHCP clients. IP address for IP session.
  • the IP network edge device After receiving the DHCP request message, the IP network edge device authenticates the DHCP client according to a preset policy, and the authentication step is the same as 406.
  • the IP network edge device determines whether the authentication of the DHCP client is successful, that is, whether the parameter matching or re-authentication is successful (507). If the authentication fails, step 508 is performed. Otherwise, step 509 is performed.
  • the IP network edge device deletes the stored session information of the DHCP client's IP session, terminates the IP session, and sends a DHCP reject message (DHCPNAK) to the DHCP client.
  • DHCPNAK DHCP reject message
  • the IP network edge device determines the originally stored session information as the IP session information of the DHCP client.
  • the IP network edge device sends a DHCP acknowledgment message (DHCPACK) to the DHCP client, where the DHCP acknowledgment message carries the session information determined in step 509.
  • DHCPACK DHCP acknowledgment message
  • the IP network edge device After the IP network edge device sends a DHCP acknowledgement message to the DHCP client, the IP session that is in the disabled state is restored to the enabled state.
  • the IP network edge device sends a second charging update request message to the AAA server, and notifies the AAA server to resume charging for the IP session.
  • the AAA server After receiving the second charging update request message sent by the IP network edge device, the AAA server returns a second charging update confirmation message to the IP edge device, and confirms that the IP session is restored.
  • the IP edge device when the original IP session is in the disabled state, the IP edge device receives a DHCP request message sent by the DHCP client, and the request message is used to request to use the originally assigned IP address in the subsequent session. After the IP edge device successfully authenticates the DHCP client, the previously stored session information is sent to the DHCK client to restore the original IP session.
  • This embodiment can also improve the same. Accuracy of billing for DHCP clients and system security, avoiding the theft of IP sessions.
  • FIG. 6 it is a flowchart of a method for restoring an IP session in Embodiment 5 of the present invention. Steps 601-604 are the same as steps 401-404, and are not described here. The method also includes:
  • the DHCP client broadcasts a DHCP discovery message (DHCPDISCOVER) to the network.
  • DHCPDISCOVER a DHCP discovery message
  • the IP network edge device After receiving the DHCP discovery message, the IP network edge device authenticates the DHCP client according to a preset policy. The authentication step is similar to 406. However, since the DHCPDISCOVER does not carry an IP address, the IP address is not matched.
  • the IP network edge device determines whether the authentication of the DHCP client is successful, that is, whether the parameter matching or re-authentication is successful. If the authentication fails, step 608 is performed; otherwise, step 609 is performed.
  • the IP network edge device deletes the stored session information of the IP session of the DHCP client, and terminates the IP session that is originally in the disabled state.
  • the IP network edge device sends a DHCP provision message (DHCPOFFE) to the DHCP client, carrying the IP address of the original IP session and session information.
  • DHCPOFFE DHCP provision message
  • the DHCP client After receiving the DHCPOFFER, the DHCP client sends a DHCP request message to the IP network edge device to request to use the original IP address if it is determined to use the original IP address for the session.
  • the IP network edge device After receiving the DHCP request message, the IP network edge device sends a DHCP acknowledgement message (DHCPACK) to the DHCP client, where the DHCPACK carries the IP address of the IP session, and may also carry other contents of the IP session information.
  • DHCPACK DHCP acknowledgement message
  • the IP network edge device can reassign the IP address to the DHCP server through the DHCP server, and carry the reassigned IP address in the DHCP server.
  • a DHCP confirmation message is sent to the DHCP client.
  • the IP edge device After the IP edge device sends a DHCP acknowledgement message to the DHCP client, the IP session that is in the disabled state is restored to the enabled state.
  • the IP network edge device sends a second charging update request message to the AAA server, and the notification is sent.
  • the AAA server resumes charging for the IP session.
  • the AAA server After receiving the second charging update request message sent by the IP network edge device, the AAA server returns a second charging update confirmation message to the IP edge device, and confirms that the IP session is restored.
  • the DHCP server sends a DHCP-provided message to provide an IP address to the DHCP client, but in this embodiment, since the original IP session is not terminated, the IP network edge device The IP address of the session has been stored on it, so the IP network edge device can proxy the DHCP server to send a DHCP offer message and a DHCP acknowledgement message to the DHCP client.
  • the IP network edge device receives the DHCP discovery message sent by the DHCP client when the original IP session is in the disabled state, and the DHCP discovery message is used to request to re-assign the IP address to the DHCP client. After the IP network edge device passes the authentication of the DHCP client, the IP address in the previously stored session information is sent to the DHCK client to restore the original IP session.
  • This embodiment can also improve the accuracy and system for charging the DHCP client. Security, avoiding the theft of IP sessions.
  • FIG. 7 is a schematic structural diagram of a network system in an embodiment of the present invention.
  • the network system includes a DHCP client 701, a network edge device 702, and a billing server 703.
  • the network edge device 702 is configured to store session information of the IP session of the DHCP client 701. The IP session status of the DHCP client 702 is detected. When it is detected that the IP session enters the disabled state, the first charging update request message is sent to the charging server 703, and the charging server is notified to suspend charging for the IP session.
  • the network edge device 702 is further configured to receive the packet sent by the DHCP client 701. When the IP session of the DHCP client 701 is disabled, the DHCP client 701 is authenticated according to the information carried in the packet and the preset policy. After the authentication fails, the IP session that is in the disabled state is terminated.
  • the IP session of the DHCP client 701 that is in the disabled state is restored, and the second charging update request message is sent to the accounting server 703, and the accounting server is notified.
  • the IP session of the DHCP client 701 resumes charging. It is also used to reply to the DHCP request message or the DHCP discovery message sent by the DHCP client 701, and provide the IP address for the DHCP client 701. Address or provide session information.
  • the authentication of the DHCP client 701 by the network edge device 702 includes: matching the information of the packet sent by the DHCP client 701 with the corresponding content in the session information of the stored IP session to implement the authentication of the DHCP client 701. Or re-authenticate the DHCP client 701.
  • the DHCP client 701 is configured to send a packet to the network edge device 702, and when the packet is a DHCP request packet carrying an IP address, the DHCP client 701 is further configured to receive the DHCP acknowledgement packet sent by the network edge device 702. Or the DHCP reject packet; when the packet is a DHCP discovery packet, it is also used to receive the DHCP provisioning packet sent by the network edge device 702.
  • the accounting server 703 is configured to charge the IP session of the DHCP client 701, and suspend or resume charging the IP session of the DHCP client 701 according to the charging update request message sent by the network edge device 702.
  • FIG. 8 is a schematic structural diagram of an edge network device according to an embodiment of the present invention.
  • the method includes: a receiving unit 801, configured to receive a packet sent by a DHCP client;
  • the session state detecting unit 803 is configured to detect whether the IP session of the DHCP client is in a disabled state, and the detecting and receiving unit does not have a time sequence in receiving the message;
  • the authentication unit 802 when the session state detecting unit 803 detects that the IP session of the DHCP client is in a disabled state, and the receiving unit 801 receives the packet sent by the DHCP client, and authenticates the DHCP client according to a preset policy; After the authentication succeeds, the message that the authentication succeeds is notified to the session recovery unit 805; if the authentication fails, the IP session information of the DHCP client stored in the storage unit 804 is deleted;
  • the storage unit 804 is configured to store IP session information of the DHCP client after the IP session of the DHCP client is established.
  • the session recovery unit 805 is configured to restore the IP session of the DHCP client after the authentication unit 802 passes the authentication of the DHCP client.
  • the session state detecting unit 805 is further configured to generate a charging update request message according to the detection result, where The network edge device further includes a sending unit 806, configured to send a charging update request message to the charging server to suspend or resume charging for the IP session of the DHCP client.
  • the authentication unit 802 may be a matching unit or a re-authentication unit, and the matching unit is configured to match the information of the packet sent by the DHCP client with the corresponding content in the session information of the IP session stored by the storage unit 804, and complete the DHCP server.
  • the re-authentication unit is used to re-authenticate DHCP clients.
  • the sending unit 806 is further configured to send a DHCP acknowledgement message or a DHCP reject message to the DHCP client.
  • the sending unit 806 also sends a DHCP providing message to the DHCP client.
  • the network edge device when the IP session of the DHCP client is disabled, receives the packet sent by the DHCP client, and authenticates the DHCP client according to the packet information and the preset policy. After the authentication is passed, the network edge device restores the packet.
  • the IP session of the DHCP client at the same time, the network edge device in this embodiment can notify the charging server to suspend or resume charging the IP session according to the state of the IP session of the DHCP client, and can improve the DHCP by implementing the embodiment of the present invention.
  • Embodiments of the invention may be implemented in software, and the corresponding software program may be stored in a readable storage medium, such as a hard disk, a cache, or an optical disk of a computer.
  • a readable storage medium such as a hard disk, a cache, or an optical disk of a computer.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur un procédé, un système de réseau et un dispositif de périphérie de réseau pour reprendre la session de protocole Internet (IP), le procédé de reprise de la session IP comprenant les opérations suivantes : lorsque la session IP d'un client de protocole de configuration d'hôte dynamique (DHCP) est dans l'état indisponible, recevoir un message envoyé par le client DHCP ; authentifier le client DHCP selon la stratégie prédéfinie ; et reprendre la session IP du client DHCP après que l'authentification a réussi. Le système de réseau comprend : un dispositif de périphérie de réseau, pour recevoir un message envoyé par un client DHCP lorsque la session IP du client DHCP est dans l'état indisponible, authentifier le client DHCP selon la stratégie prédéfinie, et reprendre la session IP du client DHCP après que l'authentification a réussi. Par mise en œuvre de la présente invention, la véracité de facturation pour le client DHCP et la sécurité du système peuvent être améliorées, et l'utilisation illégale de la session IP peut être évitée.
PCT/CN2009/071296 2008-08-18 2009-04-16 Procédé, système de réseau et dispositif de périphérie de réseau pour reprendre la session ip Ceased WO2010020123A1 (fr)

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CN200810142457.0A CN101656712B (zh) 2008-08-18 2008-08-18 一种恢复ip会话的方法、网络系统和网络边缘设备
CN200810142457.0 2008-08-18

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CN111478939B (zh) * 2020-02-29 2022-02-22 新华三信息安全技术有限公司 一种异常下线恢复方法、装置、设备及机器可读存储介质
CN113543293A (zh) * 2021-06-21 2021-10-22 天翼物联科技有限公司 支持低功耗运行的窄带物联网终端及其控制方法
CN113543293B (zh) * 2021-06-21 2023-06-27 天翼物联科技有限公司 支持低功耗运行的窄带物联网终端及其控制方法

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