CN112199241A - Dual-network-port multi-board network hot backup device - Google Patents
Dual-network-port multi-board network hot backup device Download PDFInfo
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- CN112199241A CN112199241A CN202011043078.3A CN202011043078A CN112199241A CN 112199241 A CN112199241 A CN 112199241A CN 202011043078 A CN202011043078 A CN 202011043078A CN 112199241 A CN112199241 A CN 112199241A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
- G06F11/2005—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication controllers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
- G06F11/2007—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication media
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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Abstract
The invention discloses a hot backup device of a dual-network-port multi-board network, and aims to provide a hot backup device with strong real-time performance and high hot backup reliability. The invention is realized by the following technical scheme: the standby network port of each standby exchange board is connected with the standby network port of the remote network equipment through the standby network cable of the case, the high-speed differential signal cable of the case back board is connected with the main switch and the exchanged board of other signal processing boards, and two main and standby network channels are formed between the remote network equipment and each signal processing board card; the main network communication network hot backup software built in the signal processing board sends the changed data through the standby network channel at any time; each signal processing board card detects the on-off state through a fixed port connected with a remote network, an ARM processor connected with a main exchange board and a switched board monitors the connectivity of network channels between the signal board and remote network equipment in real time, and when one network channel is disconnected, the other network channel is automatically switched to.
Description
Technical Field
The invention relates to a network widely applied to the fields of measurement and control, communication and the like at present, in particular to a dual-network-port multi-board network hot backup device in the field of communication complete machine design.
Background
The network server is the most important device of the display system, and is the throat for transmitting information between the display system and the outside. Any link goes wrong, which can cause information interruption and system breakdown. When the network server drives software, hot backup is complex to realize, and generally only one standby machine is designed to be used as cold backup. The disadvantage of cold backup is obvious, cable plugs and collinear plugs of all paths are unplugged from a fault machine and plugged into a backup machine, and then the machine is guided, so that a large amount of network data is lost and the real-time requirement is not met. The embedded real-time system is widely applied to the fields of communication electronics, aerospace, Internet of things and the like. The stability and reliability of the embedded system are very important. The method comprises the following key problems of heartbeat mechanism, control information design, information synchronization, IP conflict detection technology and the like involved in the multi-board card cooperative work and hot backup design process. With the development of technology, the dual-network-port hot backup network communication device is more and more widely applied because the dual-network-port hot backup network communication device can form a fast seamless network backup. The basic working principle of the dual-network-port hot backup network communication device is that data communication is carried out on a route passing through two network ports and two lines, and when a logic error or a physical error occurs on the route of the network, the other route is enabled to continue the data communication. If a logical error or a physical error occurs in the currently used network, the conventional backup method is that the system application software closes the current connection and opens another network port, so as to realize the continuous communication of data. The traditional backup method can only discover and switch network routes at an application layer, and has certain limitations in the fields with higher real-time requirements, such as real-time measurement and control communication and the like.
In order to ensure that the communication system runs without failure for a long time, key components of the whole system must adopt a working mode of primary and standby hot backup. The signal processing board card adopts a main and standby dual-board dual-network-port structure, and can support the board card hot plugging and the main and standby board mode to carry out seamless switching so as to respond to the reliability of multi-client connection. In order to achieve a seamless handover, a fast corresponding design of the physical and logical aspects of the hardware and software of the device must be made.
Disclosure of Invention
Aiming at the problems, the invention provides the dual-network-port multi-board network hot backup device which is simple to realize, strong in real-time performance, high in hot backup reliability and expandable in scale.
The above object of the present invention can be achieved by the following measures, wherein a dual-network-port multi-board network hot backup apparatus comprises: the signal processing integrated circuit board and the switching integrated circuit board that set up in the quick-witted case, its characterized in that: the plurality of signal processing boards are connected with the main exchange board and the exchanged board through the chassis back board and are connected with the main exchange board and the exchanged board through the high-speed differential signal lines of the chassis back board and other signal processing boards; the main network port on the output end of the main exchange board is connected with the signal processing board of the remote network equipment through the main network line of the case, the standby network port of each standby exchange board is connected with the standby network port of the remote network equipment through the standby network line of the case, and two main and standby network channels are formed between the remote network equipment and each signal processing board card; the network processor and the far-end network equipment on the main exchange board and the exchanged board establish network link based on TCP and UDP, and the main network communication network hot backup software built in the signal processing board sends changed data through a standby network channel at any time, so that the memory data at two ends of network communication are always kept consistent; each signal processing board card detects the on-off state through a fixed port connected with a remote network, an ARM processor connected with a main exchange board and a switched board monitors the connectivity of a network channel between the signal board and remote network equipment in real time, the signal processing board monitors the on-off state of the network through network on-off judging logic of network hot backup software and switches the channels of the network channel, when one network channel is disconnected, network communication is automatically switched to the other network channel, and when the currently used network has logic errors or physical errors, the network hot backup software adopts the on-off judging logic of different networks according to the difference of the network processors of the signal processing board cards, and immediately establishes connection with network access equipment again.
Compared with the prior art, the invention has the beneficial effects that:
the realization is simple. The invention adopts a signal processing board card and a switching board card which are arranged in a chassis, a plurality of signal processing boards are connected with a main switching board and a switched board through a chassis back plate, two network ports on each signal processing board are respectively connected with network ports of the main switching board and the switched board, network links based on TCP and UDP with remote network equipment are established, one network port of the main switching board is respectively connected with the signal processing board of the remote network equipment through a main network line of the chassis, a standby network port of each standby switching board is connected with a standby network port of the remote network equipment through a standby network line of the chassis, the signal processing board card of the whole system adopts a main and standby dual-board dual-network port structure to support board card hot plug and host-standby board mode for seamless switching, and the realization is simple.
The real-time performance is strong. The invention forms two main and standby network channels between the remote network equipment and each signal processing board card through the main switch and the exchanged board which are connected with other signal processing boards by the high-speed differential signal line of the chassis backboard; the signal processing board card and the remote network equipment establish network link based on TCP and UDP, no matter the signal processing board card and the remote network equipment use any network protocol, no matter the signal processing board card and the remote network equipment are used as a server or a client, when one of the network channels is disconnected, the network communication is immediately and automatically switched to the other network channel, changed data is sent through the standby network channel at any time, and the memory data at two ends of the network communication are always kept consistent.
The hot backup reliability is high. The signal processing board card detects the connection and disconnection through a fixed port connected with a remote network, an ARM processor connected with a main exchange board and a switched board monitors the connectivity of a network channel between a signal board and remote network equipment in real time, the signal processing board judges the connection and disconnection of the network through network connection and disconnection judgment logic and carries out channel switching of network access, when one network channel is disconnected, the signal processing board card is automatically switched to the other network channel, and when the currently used network has logic errors or physical errors, the signal processing board card is immediately re-connected with network access equipment. The working mode of the main backup and the hot backup of the network port equipment communication based on the TCP and the UDP responds to the reliability of the connection of the multiple clients, ensures the long-time fault-free operation of the communication system and meets the real-time seamless backup requirement of the measurement and control communication.
The scale is expandable. The signal processing board of the invention is connected with other signal processing boards, the main exchanger and the exchanged board through the high-speed differential signal of the chassis backboard. The signal processing board adopts the gigabit Ethernet chip 88E1111, and the switch board adopts the 16-port gigabit network switch chip BCM5396, so that the signal processing board has the expansibility of a signal board, and the maximum upper limit supports 13 signal processing boards based on the device structure of the invention.
The universality is strong and the compatibility is high. The signal processing daughter board onboard network processor can be a general processor such as x86, ARM, DSP, PowerPC and the like, and can also be a programmable logic device such as FPGA, CPLD and the like.
Drawings
The patent is further described below with reference to the drawings and examples.
FIG. 1 is a hardware block diagram of a network hot backup device with dual network ports and multiple boards;
fig. 2 is a schematic diagram of a network hot backup process of a network processor using network hot backup software.
The technical scheme of the invention is further described in detail in the following with reference to the attached drawings.
Detailed Description
As shown in fig. 1. In the preferred embodiment described below, the hardware of the network hot standby complete machine device with dual network ports and multiple boards includes a chassis, a signal processing board and a switch board. The plurality of signal processing boards are connected with the main exchange board and the exchanged board through the chassis back board and are connected with the main exchange board and the exchanged board through the high-speed differential signal lines of the chassis back board and other signal processing boards; the main network port on the output end of the main exchange board is connected with the signal processing board of the remote network equipment through the main network line of the case, the standby network port of each standby exchange board is connected with the standby network port of the remote network equipment through the standby network line of the case, and a main network channel and a standby network channel are formed between the remote network equipment and each signal processing board card; the network processor and the far-end network equipment on the main exchange board and the exchanged board establish network link based on TCP and UDP, and the main network communication network hot backup software built in the signal processing board sends changed data through a standby network channel at any time, so that the memory data at two ends of network communication are always kept consistent; each signal processing board card detects the on-off state through a fixed port connected with a remote network, an ARM processor connected with a main exchange board and a switched board monitors the connectivity of a network channel between the signal board and remote network equipment in real time, the signal processing board monitors the on-off state of the network through network on-off judging logic of network hot backup software and switches the channels of the network channel, when one network channel is disconnected, network communication is automatically switched to the other network channel, and when the currently used network has logic errors or physical errors, the network hot backup software adopts the on-off judging logic of different networks according to the difference of the network processors of the signal processing board cards, and immediately establishes connection with network access equipment again.
The communication of other network port devices of the dual-network-port hot backup network communication device is carried out on the basis of TCP and UDP protocols. The exchange board card mainly runs Unix tool software, an application program and all bottom layer source codes of a linux free operation system of a network protocol and adopts a virtual network card and a bound technology for network connection; an onboard ARM processor of the signal processing board card adopts an embedded real-time operating system (RTOS) to drive a link layer protocol IP detection technology which modifies and fixes an IP protocol as a network to monitor the connectivity of a network channel between the signal board and remote network equipment in real time under a real-time operating system FreeRTos system which has the characteristics of source code disclosure, portability, tailorability and flexible scheduling strategy.
The chassis adopts a general vertical VPX chassis, the network cable between the signal processing board and the main exchange board and between the signal processing board and the standby exchange board are connected by a VPX backboard, and the network cable can be connected with the network port under the condition that the VPX backboard is not provided. The main network port of each signal processing board is connected with the main network port 1.. n of the main switch through a main network cable, and the network port of each signal processing board is connected with the network port 1.. n of the standby switch through a standby network cable. The main network port of the main exchange board is connected with the main network port of the far-end network equipment through the case and the main network line, and the standby network port of the standby exchange board is connected with the standby network port of the far-end network equipment through the case and the standby network line. Thus, two main and standby network channels are formed between the remote network equipment and each signal processing board card. The signal processing board is connected with other signal processing boards, the main exchanger and the switched board through the high-speed differential signal of the chassis backboard. The signal processing board adopts the gigabit Ethernet chip 88E1111, and the switch board adopts the 16-port gigabit network switch chip BCM5396, so that the signal processing board has the expansibility of a signal board, and the maximum upper limit supports 13 signal processing boards based on the device structure of the invention.
See fig. 2. The network hot backup software adopts different network on-off judgment logic methods according to different network processors of the signal processing board card, adopts a virtual network card and a bound technology in a linux system, adopts a drive modification and fixed ip detection technology in a FreeRTos system, adopts a fixed port in an FPGA to detect on-off, and adopts a physical detection automatic switching technology in a DSP and a Vx system.
The network processor adopts network hot backup software to communicate with the main network based on TCP and UDP protocols, starts up, and the main network communication software monitors and detects the connection state of the main network and the consistency of the main network communication during normal communication and the main network communication content during starting up in real time. In the detection of the real-time connection state of the main network, after the network hot backup software detects that the network is disconnected, the current network communication is switched to the standby network communication; when the network is detected to be in a connected state, the current main network is continuously used for communication. And the standby network communication adopts a standby network route, the communication content is consistent with that of the main network, the network hot backup software detects the disconnection of the connection state of the main network in real time and switches the main network communication to the standby network communication, and when the disconnection of the connection state of the standby network is detected in real time, the current network communication is switched to the main network communication.
All features disclosed in this specification may be combined in any combination, except features and/or steps that are mutually exclusive. The above preferred embodiments are only intended to illustrate the technical solution of the present invention and not to limit, and although the present invention has been described in detail by the above preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention defined by the claims.
Claims (8)
1. A dual-network-port multi-board network hot backup device comprises: the signal processing integrated circuit board and the switching integrated circuit board that set up in the quick-witted case, its characterized in that: the plurality of signal processing boards are connected with the main exchange board and the exchanged board through the chassis back board and are connected with the main exchange board and the exchanged board through the high-speed differential signal lines of the chassis back board and other signal processing boards; the method is characterized in that: the main network port on the output end of the main exchange board is connected with the signal processing board of the remote network equipment through the main network line of the case, the standby network port of each standby exchange board is connected with the standby network port of the remote network equipment through the standby network line of the case, and two main and standby network channels are formed between the remote network equipment and each signal processing board card; the network processor and the far-end network equipment on the main exchange board and the exchanged board establish network link based on TCP and UDP, and the main network communication network hot backup software built in the signal processing board sends changed data through a standby network channel at any time, so that the memory data at two ends of network communication are always kept consistent; each signal processing board card detects the on-off state through a fixed port connected with a remote network, an ARM processor connected with a main exchange board and a switched board monitors the connectivity of a network channel between the signal board and remote network equipment in real time, the signal processing board monitors the on-off state of the network through network on-off judging logic of network hot backup software and switches the channels of the network channel, when one network channel is disconnected, network communication is automatically switched to the other network channel, and when the currently used network has logic errors or physical errors, the network hot backup software adopts the on-off judging logic of different networks according to the difference of the network processors of the signal processing board cards, and immediately establishes connection with network access equipment again.
2. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the communication of other network port devices of the dual-network-port hot backup network communication device is carried out on the basis of TCP and UDP protocols.
3. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the exchange board card runs Unix tool software, application programs and all bottom layer source codes of a linux free operation system of a network protocol and performs network connection by adopting a virtual network card and a bound technology.
4. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: an onboard ARM processor of the signal processing board card adopts an embedded real-time operating system RTOS to drive, modify and fix a link layer protocol IP detection technology taking an IP protocol as a network to monitor the connectivity of a network channel between the signal board and remote network equipment in real time under a real-time operating system FreeRTos system with the characteristics of source code disclosure, portability, tailorability and flexible scheduling strategy.
5. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the chassis adopts a general vertical VPX chassis, the network cable between the signal processing board and the main exchange board and the network cable between the signal processing board and the standby exchange board are connected by a VPX backboard, and the network cable is connected with the same network port under the condition without the VPX backboard.
6. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the main network port of each signal processing board is connected with the main network port 1.. n of the main switch through a main network cable, and the network port of each signal processing board is connected with the network port 1.. n of the standby switch through a standby network cable; the main network port of the main exchange board is connected with the main network port of the far-end network equipment through the case and the main network line, and the standby network port of the standby exchange board is connected with the standby network port of the far-end network equipment through the case and the standby network line.
7. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the signal processing board is connected with other signal processing boards, the main exchanger and the switched board through the high-speed differential signal of the chassis backboard.
8. The dual-network-port multi-board network hot backup device of claim 1, characterized in that: the signal processing board adopts a gigabit Ethernet chip 88E1111, and the switching board adopts a 16-port gigabit network switching chip BCM 5396.
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| CN202011043078.3A CN112199241B (en) | 2020-09-28 | 2020-09-28 | Double-network-port multi-board-card network hot backup device |
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| CN202011043078.3A CN112199241B (en) | 2020-09-28 | 2020-09-28 | Double-network-port multi-board-card network hot backup device |
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| US20150186206A1 (en) * | 2013-12-31 | 2015-07-02 | Ciena Corporation | Method and system for intelligent distributed health monitoring in switching system equipment |
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