WO2011057570A1

WO2011057570A1 - Data transmission method, device and system for virtual local area networks

Info

Publication number: WO2011057570A1
Application number: PCT/CN2010/078635
Authority: WO
Inventors: 任蔚
Original assignee: 华为技术有限公司
Priority date: 2009-11-13
Filing date: 2010-11-11
Publication date: 2011-05-19
Also published as: CN101702664B; CN101702664A

Abstract

A data transmission method, device and system for virtual local area networks(VLANs) are provided. The method comprises: the corresponding indices are established respectively for multiple VLANs linked with the same port of a device; one of the established indices is selected as the main index, and the binding relation is established between the device port and the main index; a data packet of the device port is transmitted to a router via the VLAN corresponding to the main index. The method, device and system select the VLAN actually used by selecting the main index, and they are enabled to realize the linking of the port and multiple VLANs without increasing the number of device ports and IP addresses, and transmit the data to the router via multiple VLANs, thus reducing the need for the ports and IPs and having no influence on the upper layer applications.

Description

Virtual local area network data transmission method, device and system

This application claims priority to Chinese Patent Application No. 200910221837.8, entitled "Virtual LAN Data Transmission Method, Equipment and System", filed on November 13, 2009, the entire contents of which are incorporated by reference. In this application. Technical field

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.

Background technique

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.

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. Among them, the scheme based on the IEEE 802.1ag protocol focuses on the management and maintenance of the end-to-end Ethernet link, while 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. In a specific network application process, due to different planes, different lease fees, or different For network providers and other reasons, backup is required through two VLANs (Virtual LAN, 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). Control Protocol/Internet Protocol, L2 of the protocol stack, ie the data link layer. In this case, the backup needs to be able to switch VLANs to complete the backup function.

To implement VLAN backup, you need to support two physical ports on the terminal device. Each physical port is connected to a VLAN. Switching between the two physical ports is implemented. If the terminal device needs to perform VLAN switching on one physical port, you need to configure a corresponding IP address for each VLAN, and then switch the VLAN by switching the IP address to achieve the backup. Because the IP address needs to be changed, VLAN switching using one port will affect the services of Layer 3. The Layer 3 here refers to the L3 of the TCP/IP protocol stack, that is, the IP layer.

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. When 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.

The disadvantages of this solution are as follows: Multiple ports are required to implement VLAN switching. Multiple ports need to be connected to multiple physical lines, which directly increases the transmission cost. When implementing VLAN switching, multiple IP addresses must be used, and IP addresses are added. Consumption. Summary of the invention

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.

In one aspect, 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.

In another aspect, 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.

In another aspect, 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. When the device provided by the foregoing embodiment is a terminal device, 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; when 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. DRAWINGS

1 is a schematic diagram of a VLAN backup system in the prior art;

2 is a flowchart of a method according to Embodiment 1 of the present invention;

2a is a second flowchart of a method according to Embodiment 1 of the present invention;

3 is a third flowchart of a method according to Embodiment 1 of the present invention;

4 is a functional block diagram of a device 10 according to Embodiment 2 of the present invention;

5 is a second functional block diagram of a device 10 according to Embodiment 2 of the present invention;

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

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. 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:

S201: 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.

S202. Select an established index as a primary index, and establish a binding between the device port and the primary index. Relationship

S203. Send a data packet of the device port to the router through a virtual local area network corresponding to the primary index.

In the solution of the embodiment of the present invention, 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.

Optionally, 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 1: Router ARP Table

Table 2: Port Index Match Table

Table 3: Index Table of Contents Cable VLAN quotation mark

1 VLAN

100

2 VLAN

200 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. As shown in Table 1 to Table 3, 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.

Optionally, Table 3 of this embodiment may also be Table 3a. Table 3a: Index Table of Contents

As shown in Table 3a, the index value of this embodiment may also be the DSCP of the IP address. (Differentiated Services Code Point) field, a DSCP value corresponds to a VLAN, so each index can correspond to a group of VLANs. Among them: AF (Assured Forwarding) and EF (Expedited Forwarding) indicate DSCP

( differentiated services code point, the priority of the service code point), located in the QoS field of the IP header. VLAN priority is optional, which indicates the data transmission priority of different VLANs.

As shown in Table 3a, in this embodiment, 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. Use before switching VLAN100, VLAN200 and VLAN300, and use VLAN400 VLAN500 _o Alternatively, in the present embodiment, after the handover, 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.

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:

S204. Check whether the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally.

S205. When the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, re-select an established index as a primary index, and update the binding relationship to a binding relationship between the device port and the reselected primary index.

S206. Send the data packet of the device port to the router through the virtual local area network corresponding to the reselected primary index.

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.

In combination with the content of Table 2, when the VLAN 100 is disconnected, 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:

5301. Create a corresponding index for multiple VLANs connected to the same port of the device. Optionally, as shown in Table 3, the index of this embodiment may be a VLAN ID, and each VLAN ID corresponds to one VLAN. Optionally, as shown in Table 3a, 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.

5302. Select an established index as the primary index to establish a binding relationship between the device port and the primary index.

As shown in Table 2, you can select index 1 as the primary index of EthO.

S303. 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.

Alternatively, only 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.

5305. Determine whether the VLAN corresponding to the primary index is connected. If the VLAN corresponding to the primary index is connected, the current port index binding relationship is maintained, and the process returns to step S304 to continue the detection. If not, the process proceeds to step S306.

5306. Reselect an established index as a primary index, and update the binding relationship to a binding relationship between the device port and the reselected primary index.

Corresponding to the two modes of step S304, 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.) As 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;

If the VLAN corresponding to the primary index is not connected, and 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.

5307. The data packet of the device port is sent to the router through the VLAN corresponding to the reselected primary index.

For example, after the primary index is modified to index 2, 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. A virtual LAN connection, and sending 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.

Further, the method in this embodiment performs port and VLAN index binding on the device. When a VLAN cannot communicate normally, 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.

In addition, in this embodiment, the router ARP entry (Table 1) and the port index binding entry (Table 2) can be separately stored. The advantage is that once the VLAN is switched, only the port index matching entry needs to be modified (Table 2). ), without updating the router ARP entry (Table 1). For example, 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. When it is detected that VLAN 100 is disconnected, 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. As shown in FIG. 4, 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.

Optionally, 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. As shown in Table 2, 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.

Optionally, 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.

Optionally, 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.

Taking the contents of Table 1 to Table 3 as an example: 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. As shown in FIG. 5, 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, and 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.

In this embodiment, 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.

Alternatively, 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.

Taking the contents of Table 1 to Table 3 as an example: 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.

Further, the device in the embodiment of the present invention binds the device port and the VLAN index. When a certain VLAN cannot communicate normally, 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. In addition, 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.

As shown in FIG. 6, 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. 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.

To check the connectivity of VLAN 30 and VLAN 40, you can set the connectivity detection domain and check the connectivity of VLAN 30 and VLAN 40 according to the 802. lag protocol. The details include: Setting the MEP (Maintenance Association End Point) on both ends of the detection domain. Alliance edge node), selectively set MIP in the detection domain (Maintenance association Intermediate) Point, maintain the federation edge node) or MEP. Optionally, in FIG. 6, MEP1 may be set in switch 50, MEP4 may be set in the terminal device, MIP1 is set in VLAN 30, and 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. Different from Figure 6, 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. When the VLAN is switched, 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. As shown in FIG. 8, 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.

In order to check the connectivity of VLAN 30 and VLAN 40, you can set the connectivity detection domain and check the connectivity between VLAN 30 and VLAN 40 according to the 802. lag protocol. In Figure 8, the terminal device does not need to know the connectivity of the VLAN, so it does not need to be in the terminal. In the device 10, a maintenance point is set. In Figure 8, 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. By selecting a primary index to select the actual VLAN to be used, 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.

Further, the system in this embodiment binds the device port and the VLAN index. When a VLAN cannot communicate normally, 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).

The above embodiments are only used to explain the technical solutions of the embodiments of the present invention, and are not limited thereto; although the embodiments of the present invention are described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are replaced by equivalents; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the embodiments of the present invention.

Claims

Rights request

A data transmission method for a virtual local area network, the method comprising: establishing a corresponding index for each of a plurality of virtual local area networks connected to the same device port of the device;

Selecting an established index as a primary index, and establishing a binding relationship between the device port and the primary index;

The data packet of the device port is sent to the router through a virtual local area network corresponding to the primary index.

The method according to claim 1, wherein the method further comprises: detecting whether a communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally;

When the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, re-select an established index as a primary index, and update the binding relationship between the device port and the reselected primary index. Binding relationship

The data packet of the device port is sent to the router through a virtual local area network corresponding to the reselected primary index.

The method according to claim 2, wherein the re-selecting an established index as a primary index comprises:

Re-select an established index from the established index as the primary index.

The method according to claim 2, wherein the method further comprises: detecting whether a communication link of all virtual local area networks connected to the same port of the device is capable of normal communication;

The re-selecting an established index as a primary index includes: Re-select an established index as the primary index from the index corresponding to the communication link capable of normal communication.

5. A method according to any one of claims 1 to 4, characterized in that

The establishing a corresponding index for the multiple virtual local area networks connected to the same device port of the device includes: establishing a port index matching entry for the plurality of virtual local area networks connected to the same device port of the device, where the port index matching entry The index of the plurality of virtual local area networks corresponding to the device port, where the indexes of the plurality of virtual local area networks include a primary index bound to the device port;

The method further includes: storing a router address resolution protocol ARP entry, where the router ARP entry includes: an IP address of the router, a media access control MAC address of the router, and a device port connecting the multiple virtual local area networks .

6. The method of claim 5, wherein

The method further includes: storing an index content table of each index, where the index content table includes an index value corresponding to an index of the virtual local area network; the index value is a virtual local area network identifier; or the index value is an IP address. A differential service code point field, where a differential service code point value corresponds to a virtual local area network.

7. A device, wherein the device comprises:

Establishing a unit, configured to respectively establish a corresponding index for multiple virtual local area networks connected to the same device port of the device;

a binding unit, configured to select an index established by the establishing unit as a primary index, and establish a binding relationship between the device port and the primary index;

And a sending unit, configured to send, by the virtual local area network corresponding to the primary index, the data packet of the device port to the router.

The device according to claim 7, wherein the device further comprises: a detecting unit, configured to detect whether a communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally;

And an updating unit, configured to: when the communication link where the virtual local area network corresponding to the primary index is located cannot communicate normally, reselect an established index as a primary index, and update the binding relationship to the device port and reselect The binding relationship between the primary indexes;

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 reselected primary cable.

9. Apparatus according to claim 8 wherein:

The updating unit is configured to reselect an established index from the established indexes as a primary index.

10. Apparatus according to claim 8 wherein:

The detecting unit is further configured to detect whether a communication link where all virtual local area networks connected to the same port of the device are located can communicate normally;

The updating unit is further configured to reselect an established index as a primary index from an index corresponding to a communication link capable of normal communication.

11. Apparatus according to any of claims 7-10, characterized in that

The establishing unit is configured to establish a port index matching entry for the plurality of virtual local area networks connected to the same port of the device, where the port index matching entry includes: an index of multiple virtual local area networks corresponding to the device port, where The index of the plurality of virtual local area networks includes a primary index bound to the device port;

The device further includes: a storage unit, configured to store a router address resolution protocol ARP entry, where the router ARP entry includes: an IP address of the router, and media access of the router Controlling the MAC address and the device port connecting the plurality of virtual local area networks.

12. Apparatus according to claim 11 wherein:

The storage unit is further configured to store an index content table of each index, where the index content table includes an index value corresponding to an index of the virtual local area network; the index value is a virtual local area network identifier; or the index value is an IP value. The differential service code point field of the address, where a differential service code point value corresponds to a virtual local area network.

13. The device according to claim 12, wherein the device is a terminal device or a switch device.

A data transmission system for a virtual local area network, comprising: the apparatus according to any one of claims 7-12,

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, and a router connected to the plurality of virtual local area networks; when the device is a switch In the device, the system further includes: a terminal device, the terminal device is connected to the switch device, a plurality of virtual local area networks connected to the same port of the switch device, and a router connected to the plurality of virtual local area networks.