WO2011057570A1 - Procédé, dispositif et système de transmission de données pour réseaux locaux virtuels - Google Patents

Procédé, dispositif et système de transmission de données pour réseaux locaux virtuels Download PDF

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Publication number
WO2011057570A1
WO2011057570A1 PCT/CN2010/078635 CN2010078635W WO2011057570A1 WO 2011057570 A1 WO2011057570 A1 WO 2011057570A1 CN 2010078635 W CN2010078635 W CN 2010078635W WO 2011057570 A1 WO2011057570 A1 WO 2011057570A1
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Prior art keywords
index
local area
virtual local
port
router
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PCT/CN2010/078635
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English (en)
Chinese (zh)
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任蔚
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华为技术有限公司
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    • 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]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, device, and system for a virtual local area network.
  • Ethernet technology is simple and easy to use, low in price, and scalable in bandwidth. Whether it is a service or a network structure, it has been widely applied in enterprise networks, metropolitan area networks, and wide area networks. . However, traditional Ethernet can be maintained and has poor operational capabilities. As the scope of Ethernet promotion expands, operators are increasingly demanding Ethernet OAM (Operations, Administration and Maintenance) functions.
  • OAM Operations, Administration and Maintenance
  • Ethernet OAM IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) conducted research on Ethernet OAM.
  • the current Ethernet OAM can be implemented by two protocol solutions: an IEEE 802. lag protocol based scheme and an IEEE 802.3ah protocol based scheme.
  • the scheme based on the IEEE 802.1ag protocol focuses on the management and maintenance of the end-to-end Ethernet link
  • the IEEE 802.3ah protocol scheme focuses on the management and maintenance of the point-to-point (only the user side does not involve the network side).
  • the combination of the two can provide a complete Ethernet OAM network solution.
  • VLAN Virtual LAN
  • the primary VLAN and the backup VLAN are transmitted through different Layer 2 channels.
  • the Layer 2 here refers to TCP/IP (Transmission).
  • the backup needs to be able to switch VLANs to complete the backup function.
  • the Layer 3 here refers to the L3 of the TCP/IP protocol stack, that is, the IP layer.
  • VLAN + route For the VLAN backup, you can use the VLAN + route to implement Layer 2 backup.
  • the physical connection of the networking is shown in Figure 1.
  • the two ports of the terminal device 10 use different VLANs, and each VLAN configures an IP address of a different network segment, and the gateway and the route are also different.
  • a link is faulty, you can switch the port and use the VLAN corresponding to the other IP address to communicate.
  • the effective route used to send data to the outside uses the route of the other network segment.
  • Embodiments of the present invention provide a data transmission method, device, and system for a virtual local area network, which can implement connection of a device port and multiple virtual local area networks at low cost, and pass multiple virtual local area networks. Send data to the router.
  • the embodiment of the present invention provides a data transmission method for a virtual local area network, where the method includes: establishing a corresponding index for multiple virtual local area networks connected to the same port of the device; selecting an established index as a primary index, establishing a The binding relationship between the device port and the primary index is performed; the data packet of the device port is sent to the router through a virtual local area network corresponding to the primary cable 1.
  • the embodiment of the present invention provides a device, where the device includes: an establishing unit, configured to respectively establish a corresponding index for multiple virtual local area networks connected to the same port of the device; and a binding unit, configured to select an established The index is used as a primary index to establish a binding relationship between the device port and the primary index.
  • the sending unit is configured to send the data packet of the device port to the router through a virtual local area network corresponding to the primary index.
  • the embodiment of the present invention further provides a data transmission system of a virtual local area network, where the system includes the device provided by the foregoing embodiment.
  • the system further includes: a plurality of virtual local area networks connected to the same port of the terminal device, and a router connected to the plurality of virtual local area networks;
  • the device provided by the foregoing embodiment is a switch device
  • the system further includes: a terminal device, the terminal device, and the The switch is connected to a plurality of virtual local area networks connected to the same port of the switch, and a router connected to the plurality of virtual local area networks.
  • the technical solution of the embodiment of the present invention is to establish a corresponding index for multiple VLANs connected to the same port of the device, and select a primary index to select the actually used VLAN, so that the connection between the device port and multiple virtual local area networks can be realized at a low cost. And send data to the router through multiple virtual local area networks.
  • FIG. 1 is a schematic diagram of a VLAN backup system in the prior art
  • FIG. 2a is a second flowchart of a method according to Embodiment 1 of the present invention.
  • FIG. 3 is a third flowchart of a method according to Embodiment 1 of the present invention.
  • FIG. 4 is a functional block diagram of a device 10 according to Embodiment 2 of the present invention.
  • FIG. 5 is a second functional block diagram of a device 10 according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of a data transmission system of a virtual local area network according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic diagram of a data transmission system of a virtual local area network according to Embodiment 3 of the present invention
  • FIG. 8 is a schematic diagram of a virtual local area network according to Embodiment 3 of the present invention
  • the schematic of the data transmission system is three. detailed description
  • Embodiment 1 This embodiment provides a data transmission method for a virtual local area network.
  • FIG. 2 is a flowchart of a method in this embodiment, as shown in FIG. 2: The method includes:
  • a corresponding index is established for each of multiple virtual local area networks connected to the same port of the device; the same port refers to the same device port of the device.
  • a port index matching entry may be established for multiple virtual local area networks connected to the same port of the device, and different indexes correspond to different VLANs.
  • the method in this embodiment may further include storing a router address resolution protocol ARP entry, and/or an index content entry of each index.
  • Table 1 to Table 3 are the router ARP table, the port index matching table, and the index content table of the embodiment, where Table 2 and Table 3 can also be combined into one table. It is to be understood that the contents of Tables 1 to 3 are only for explaining the present embodiment, and are not intended to limit the scope of the claims.
  • Table 3 Index Table of Contents Cable VLAN quotation mark
  • Router ARP entries (Table 1) of this embodiment include: the IP address of the router, the MAC address of the router, and the device port connecting multiple VLANs.
  • the port index matching entry in this embodiment (Table 2) includes: an index of multiple virtual local area networks corresponding to the device port, where multiple indexes include a primary index bound to the device port, for example, the main EthO in Table 2.
  • the index is 1.
  • the index value in the index content table (Table 3) of this embodiment is the VLAN ID (virtual area network identifier), and each VLAN ID corresponds to one VLAN.
  • the data packet sent from EthO in this embodiment is sent to the router shown in Table 1 through VLAN 100 corresponding to index 1.
  • Table 3 of this embodiment may also be Table 3a.
  • Table 3a Index Table of Contents
  • the index value of this embodiment may also be the DSCP of the IP address.
  • a DSCP value corresponds to a VLAN, so each index can correspond to a group of VLANs.
  • AF sured Forwarding
  • EF Expedited Forwarding
  • VLAN priority is optional, which indicates the data transmission priority of different VLANs.
  • the AF1 priority level of the index 1 corresponds to the VLAN 100.
  • the AF3 priority corresponds to the VLAN 200, and the EF priority level corresponds to the VLAN 300.
  • the AF1 priority level of the index 2 corresponds to the VLAN 400 and the AF3 priority level corresponds to the VLAN 500.
  • under different DSCP values corresponding to the same index may be the same VLAN ID, for VLAN priority determined by The priority of data transmission for different VLANs.
  • FIG. 2a is a second flowchart of the method of the embodiment, as shown in FIG. 2a: The method further includes the following steps on the basis of FIG. 2:
  • This embodiment can use two ways to reselect the primary index.
  • An optional method is: detecting whether the communication link of the virtual local area network corresponding to the primary index can communicate normally; when detecting that the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, Re-select one of the indexes as the primary index, for example, it can be a random selection, or it can be re-selected from other indexes than the current primary index.
  • Another optional method is: detecting whether the communication link of all the virtual local area networks connected to the same port of the device can communicate normally, and reselecting one of the indexes corresponding to the communication link capable of normal communication as the primary index.
  • the binding relationship between EthO and index 1 can be modified to the binding relationship with index 2.
  • the index 2 corresponds to VLAN 200, and the packet sent from EthO carries the packet header of VLAN 200. After that, it is sent to the router according to the router's ARP table.
  • FIG. 3 is a third flowchart of the method of the embodiment, which is a detailed flowchart of the method of the embodiment. As shown in Figure 3: The method includes:
  • the index of this embodiment may be a VLAN ID, and each VLAN ID corresponds to one VLAN.
  • the index of this embodiment may also be a DSCP field of the IP. Different DSCP priorities correspond to different VLANs, so each index can correspond to multiple VLANs.
  • index 1 As shown in Table 2, you can select index 1 as the primary index of EthO.
  • the data packet of the device port is sent to the router through the VLAN corresponding to the primary index. As shown in Table 1 to Table 3, the data packet sent by the EthO is sent to the corresponding router by using the VLAN 100 corresponding to the index 1.
  • S304. Detect the connectivity of the VLAN connected to the same port of the device, that is, whether the communication link where the virtual local area network is located can communicate normally.
  • the connectivity of the VLAN corresponding to the primary index may be detected; or, for the reliability of the VLAN handover, that is, the switched VLAN is available, the connectivity of all VLANs may also be detected.
  • step S306 can also be implemented in two ways: if the VLAN corresponding to the primary index is not connected, and the connectivity of all VLANs is detected in step S304, the detected from the detected Re-selecting the index corresponding to the Unicom VLAN (can be randomly selected, or selected according to priority, or according to the length of the Unicom time length), etc.)
  • a primary index establish a binding relationship between the device port and the reselected primary index. The method is high in reliability because it is known in advance that the re-selected primary index is connected;
  • step S304 detects only the connectivity of the VLAN corresponding to the primary index, then selecting any other VLAN as the primary index is a relatively simple manner. Real-time detection of connectivity of all VLANs is not required.
  • the data packet of the device port is sent to the router through the VLAN corresponding to the reselected primary index.
  • the data packet sent by EthO is corresponding to index 2.
  • VLAN 200 is sent to the corresponding router.
  • the method in this embodiment is to establish a corresponding index for multiple VLANs connected to the same port of the device, and select a primary index to select the actually used VLAN.
  • This method can implement ports and ports without increasing the number of ports and the number of IP addresses.
  • the method in this embodiment performs port and VLAN index binding on the device.
  • the VLAN index corresponding to the communication port can be changed to switch the VLAN without changing the IP address.
  • the method of this embodiment can implement switching of multiple VLANs by using only one port.
  • the router ARP entry (Table 1) and the port index binding entry (Table 2) can be separately stored.
  • EthO first establishes a binding relationship with index 1.
  • Index 1 corresponds to VLAN 100.
  • Packets sent from EthO are sent to the router according to the router ARP table after the packet header of VLAN 100 is sent.
  • EthO and index 1 are The binding relationship is modified to the binding relationship with index 2.
  • the index 2 corresponds to VLAN 200.
  • the data packet sent from EthO is sent to the router according to the ARP table of the router.
  • the method of this embodiment can be applied to a network of the IEEE 802.1ag protocol.
  • the IEEE 802. lag protocol supports connectivity detection on Ethernet, enabling timely detection, recovery, and management of network anomalies or abnormalities such as downgrading and failure of Ethernet services.
  • the method of the embodiment of the present invention can detect the link and trigger the switching of the VLAN through the IEEE 802. lag to complete the switching of the Layer 2 link, and achieve the purpose of link backup and switching. Since 802.1ag can be set very short The link switching detection time can be quickly switched. This type of backup switching can be implemented as long as the primary link or the primary and backup links of the Layer 2 link support 802.1ag.
  • Embodiment 2 This embodiment provides a device capable of implementing the data transmission method of the virtual local area network in Embodiment 1.
  • the device in this embodiment may be a terminal device (such as a base station or a PC server) in different network applications, or may be a switch device or other communication device capable of implementing equivalent functions.
  • FIG. 4 is a functional block diagram of the device 10 of the embodiment.
  • the device 10 includes: an establishing unit 101, configured to respectively establish corresponding indexes for multiple virtual local area networks connected to the same device port of the device.
  • the binding unit 102 is configured to select an index established by the establishing unit 101 as a primary index, and establish a binding relationship between the device port and the primary index.
  • the sending unit 103 is configured to: pass the data packet of the device port to the virtual node corresponding to the primary index.
  • the LAN is sent to the router.
  • the establishing unit 101 of the embodiment is configured to establish a port index matching entry for each of multiple virtual local area networks connected to the same port of the device.
  • the port index matching entry includes: an index of multiple virtual local area networks corresponding to the device port, and the index of multiple virtual local area networks includes a primary index bound to the device port.
  • the device 10 of this embodiment may further include: a storage unit 104, configured to store a router address resolution protocol ARP entry, as shown in Table 1, the router ARP entry in this embodiment may include: an IP address of the router The media access control MAC address of the router and the device port connecting multiple virtual local area networks.
  • the storage unit 104 of the device 10 of the embodiment is further configured to store an index content table of each index, as shown in Table 3 or Table 3a, where the index content table of the embodiment includes a virtual local area network.
  • the index value corresponding to the index; the index value may be a virtual local area network identifier VLAN ID; or the index value may also be a differential service code point field DSCP of the IP address, and one DSCP value corresponds to one VLAN.
  • the establishment unit 101 of the device 10 establishes Table 1 to Table 3; the binding unit 102 selects the primary index in Table 2 as the index 1; and the transmitting unit 103 transmits the data packet sent by the EthO.
  • the VLAN 100 corresponding to index 1 is sent to the router shown in Table 1.
  • FIG. 5 is a second functional block diagram of the device 10 of the embodiment.
  • the device 10 of the present embodiment includes a detecting unit 105 and an updating unit 106 in addition to the unit of FIG. 4, and these two units cooperate to implement VLAN switching.
  • the detecting unit 105 is configured to detect whether the communication link where the virtual local area network corresponding to the primary index is incapable of communicating normally
  • the updating unit 106 configured to: when the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, reselect one
  • the established index is used as the primary index, and the binding relationship is updated to the binding relationship between the device port and the reselected primary index.
  • the sending unit 103 is configured to pass the data packet of the device port to the primary index corresponding to the reselected primary index.
  • the virtual LAN is sent to the router.
  • the detecting unit 105 and the updating unit 106 cooperate to reselect the main index.
  • An optional method is: the detecting unit 105 detects only whether the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally; and the updating unit 106, when the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, Reselect one of the established indexes as the primary index. This method only needs to detect the connectivity of the VLAN corresponding to the primary index, which is an efficient and convenient method.
  • the detecting unit 105 detects whether the communication link of all the virtual local area networks connected to the same port of the device can communicate normally; the updating unit 106, from the index corresponding to the communication link capable of normal communication Reselect one as the primary index. This method needs to be checked It is a reliable way to measure the connectivity of all VLANs and ensure that the switched VLANs are available.
  • the establishment unit 101 of the device 10 establishes Table 1 to Table 3; the binding unit 102 selects the primary index in Table 2 as the index 1; and the transmitting unit 103 transmits the data packet sent by the EthO.
  • the VLAN 100 corresponding to the index 1 is sent to the router shown in Table 1.
  • the detecting unit 105 and the updating unit 106 cooperate to complete the VLAN switching: when detecting that the link of the VLAN 100 corresponding to the index 1 cannot communicate normally, perform VLAN switching, and then perform EthO.
  • the primary index is modified to index 2; the sending unit 103 sends the data packet sent by the EthO to the router shown in Table 1 through the VLAN 200 corresponding to the index 2 according to the modified primary index.
  • the device in this embodiment separately establishes corresponding indexes for multiple VLANs connected to the same port, and selects a primary index to select an actual used VLAN.
  • the device can implement multiple ports without increasing the number of ports and the number of IP addresses.
  • the connection of the virtual local area network and the sending of data to the router through multiple virtual local area networks reduces the need for ports and IP, and has no effect on the upper layer application.
  • the device in the embodiment of the present invention binds the device port and the VLAN index.
  • the VLAN index of the communication port can be changed to switch the VLAN without changing the IP address.
  • the device of this embodiment can implement switching of multiple VLANs by using only one port.
  • the device in this embodiment separately stores the router ARP entry (Table 1) and the port index binding entry (Table 2). The advantage is that once the VLAN is switched, only the port index matching entry needs to be modified. 2), without updating the router ARP entry (Table 1).
  • the device of this embodiment is also applicable to the network of the IEEE 802.1ag protocol.
  • Example 3 This embodiment provides a data transmission system of a virtual local area network.
  • the system includes the apparatus of Embodiment 2 and is capable of implementing the data transmission method of Embodiment 1.
  • This embodiment provides various system architectures, which respectively correspond to the terminal device and the switch device of Embodiment 2.
  • the system includes the device of the foregoing device embodiment, and when the device is a terminal device, the system further includes: a plurality of virtual local area networks connected to the same port of the terminal device, a router connected to the plurality of virtual local area networks; and the device is a switch In the case of the device, the system further includes: a terminal device connected to the switch, a plurality of virtual local area networks connected to the same port of the switch, and a router connected to the plurality of virtual local area networks. The details are described below separately.
  • FIG. 6 is a schematic diagram of a data transmission system of a virtual local area network according to an embodiment of the present invention.
  • the schematic diagram uses two VLANs as an example for description.
  • the system includes a terminal device 10 (see FIG. 4 to FIG. 5 for a block diagram), a switch 20 connected to the terminal device 10, a router 60, and a switch 50 connected to the router 60, a switch 20, and a switch 50.
  • VLAN 30 and VLAN 40 With VLAN 30 and VLAN 40 connected, you can set VLAN 30 as the primary link and VLAN 40 as the standby link.
  • the Lanswitch (Ethernet switch) in VLAN 30 and VLAN 40 is responsible for supporting networking and forwarding packets.
  • the terminal device 10 uses one port to connect VLAN 30 and VLAN 40.
  • the port between the terminal device 10 and the switch 20 is a TRUNK port, and the port between the router 60 and the switch 50 is also a TRUNK port.
  • the TRUNK port can transmit packets carrying different VLAN headers, and can receive and send multiple types of packets. VLAN ID packet.
  • MEP Maintenance Association End Point
  • Alliance edge node selectively set MIP in the detection domain (Maintenance association Intermediate) Point, maintain the federation edge node) or MEP.
  • MEP1 may be set in switch 50
  • MEP4 may be set in the terminal device
  • MIP1 is set in VLAN 30
  • MIP2 is set in VLAN 40.
  • the connectivity between VLAN 30 and VLAN 40 is detected by these maintenance points.
  • FIG. 7 is a second schematic diagram of a data transmission system of a virtual local area network according to the embodiment.
  • VLAN 30 and VLAN 40 of Figure 7 are connected to different routers 60 and routers 70, respectively.
  • the terminal device 10 needs to store the ARP tables of the router 60 and the router 70, respectively.
  • the corresponding router is switched at the same time. For example, when switching from VLAN 30 to VLAN 40, the next hop address of the IP packet is simultaneously changed from the IP address of the router 60 to the IP address of the router 70.
  • FIG. 8 is a third schematic diagram of the data transmission system of the virtual local area network according to the embodiment. Different from FIG. 6 and FIG. 7 , the VLAN switching work in this embodiment is completed by the switch, and the terminal device only needs to complete simple data transmission with the switch.
  • the system includes a terminal device 10, a switch 20 connected to the terminal device 10 (see FIG. 4 to FIG. 5 for details), and a router 60.
  • a VLAN 30 and a VLAN 40 are connected between the switch 20 and the router 60, and can be set.
  • VLAN 30 is the standby link VLAN 40.
  • Switch 20 uses the same port to connect VLAN 30 and VLAN 40.
  • the port between the switch device 20 and the terminal device 10 is an ACCESS port.
  • the terminal device does not need to know the connectivity of the VLAN, so it does not need to be in the terminal.
  • a maintenance point is set.
  • MEP4 can be set in the switch 20
  • MEP2 and MIP1 are set in the VLAN 30, and MEP3 and MIP2 are set in the VLAN 40.
  • the maintenance points of the VLAN 1 and the VLAN 2 are detected through the maintenance points.
  • the system of this embodiment is a plurality of systems connected to the same port of the terminal device or the switch device.
  • VLANs respectively establish corresponding indexes.
  • the system can connect the device ports to multiple virtual local area networks without adding the number of ports and the number of IP addresses on the device.
  • the virtual local area network sends data to the router, which reduces the need for ports and IP, and has no effect on the upper layer application.
  • the system in this embodiment binds the device port and the VLAN index.
  • the VLAN index of the communication port can be changed to switch the VLAN without changing the IP address.
  • the device of this embodiment can implement switching of multiple VLANs by using only one port.
  • the program may be implemented by a computer program to instruct related hardware, and the program may be stored in a computer readable storage medium, which, when executed, may include the flow of an embodiment of the methods described above.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (Random Access Memory, RAM).

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

Abstract

La présente invention concerne un procédé, un dispositif et un système de transmission de données pour des réseaux locaux virtuels (« Virtual Local Area Networks » ou VLAN). Le procédé comprend les étapes suivantes : les index correspondants sont établis respectivement pour de multiples VLAN liés au même port d'un dispositif; un des index est sélectionné en tant qu'index principal, et la relation de liaison est établie entre le port de dispositif et l'index principal; un paquet de données du port de dispositif est transmis à un routeur par l'intermédiaire du VLAN correspondant à l'index principal. Le procédé, le dispositif et le système sélectionnent le VLAN réellement utilisé en sélectionnant l'index principal, et ils peuvent réaliser la liaison du port et de multiples VLAN sans augmenter le nombre de ports de dispositif et d'adresses IP, et transmettent les données au routeur par l'intermédiaire de multiple VLAN, réduisant ainsi la nécessité des ports et des IP et sans aucune influence sur les applications de couche supérieure.
PCT/CN2010/078635 2009-11-13 2010-11-11 Procédé, dispositif et système de transmission de données pour réseaux locaux virtuels WO2011057570A1 (fr)

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CN102412978B (zh) * 2010-09-21 2014-04-16 杭州华三通信技术有限公司 一种针对虚拟主机进行网络配置的方法和系统
CN102752199B (zh) * 2012-06-21 2014-12-24 中国科学院计算技术研究所 一种虚拟路由器的数据转发平面的构建方法与系统
CN105939309B (zh) * 2015-07-28 2019-08-06 杭州迪普科技股份有限公司 一种虚拟机隔离方法及装置
CN109889421B (zh) * 2019-03-06 2021-04-30 乐鑫信息科技（上海）股份有限公司 路由器的管理方法、装置、终端、系统及存储介质

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