CN103209140B - Intelligence PoE switch and its implementation - Google Patents
Intelligence PoE switch and its implementation Download PDFInfo
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Abstract
The invention discloses a kind of intelligent PoE switch and its implementation, switch system comprises intelligent PoE switch system and comprises: exchanges data, PoE management, system management, power supply four modules.Data exchange module and PoE administration module adopt exchanges data ASIC and ports-Extending ASIC thereof and PoE management asic respectively; System management module adopts intelligent exchange web administration MCU, and utilize the web administration of SSI, CGI technology and uIP protocol realization switch, MCU passes through I
2c, MII Interface realization is to the intelligent management of data exchange module and PoE administration module; Power module adopts ups power to be respectively PoE power supply and system power supply is powered.The present invention not only has Web intelligent management function, also has uninterrupted PoE function of supplying power, and supports all types of AF/AT equipment completely, has very strong adaptability.
Description
Technical field
The present invention relates to a kind of intelligent PoE switch and its implementation.
Background technology
Universal along with network and digital product, occurred the terminal equipments such as a large amount of such as IP phone, wireless local network connecting point AP, web cameras, when being deployed in application-specific scene, their power taking problem annoyings people always.Traditional way is for it configures independent power supply, not only increases system cost, also can extend the construction period.New solution uses the PoE combine with technique network switch to carry out remote power feeding by Ethernet, and network topology does not make any change, saves system cost.
The AT equipment that early stage PoE Managed Solution adds owing to not yet considering new standard, the compatibility for different PD equipment is bad.PoE solution general at present all adopts flush bonding processor+PoE management asic solution, can compatible various AF/AT equipment preferably, but generally lack user management pattern or the operation of special webmaster management software will be used, when running into fault or need the application scenario of special setting, in these solutions, the operability of user is not strong, flexibility is inadequate, is difficult to satisfying personalized user's request.
Can also normally work under ensureing short-term power down mode because communication apparatus General Requirements has ups power, and PD equipment (power consumption equipment) is not power autonomous, this just requires that PSE device (power supply unit) has uninterrupted POE function of supplying power, and current PoE switch does not have PoE uninterrupted power supply function substantially.
POE (Power Over Ethernet) refers to when existing Ethernet Cat.5 wiring architecture does not make any changes, while for some IP-based terminals (as IP telephone machine, wireless local network connecting point AP, web camera etc.) transmission of data signals, the technology of direct current supply can also be provided by kind equipment for this reason.POE technology can ensure the normal operation of existing network while guaranteeing existing structureization wiring safety, reduces costs to greatest extent.
PoE is also referred to as based on local area network (LAN)
electric power system(PoL, Power over LAN) or active Ethernet (Active Ethernet), sometimes also Power over Ethernet is called for short, this is the newest standards specification transmitting data and electrical power while of utilizing existing standard Ethernet transmission cable, and maintains the compatibility with existing Ethernet system and user.
ASIC (Application Specific Intergrated Circuits) i.e. application-specific integrated circuit (ASIC), refers to and answers specific user to require the integrated circuit designing with the needs of particular electronic system, manufacture.It is one of the most popular mode that current CPLD (CPLD) and FPGA (field programmable logic array) carries out ASIC design, their general character all has user's field-programmable characteristic, all support boundary scan technique, but both has respective feature on integrated level, speed and programming mode.The feature of ASIC is the demand towards specific user, wide in variety, few in batches, require design and with short production cycle, the product that it is combined closely as complete machine or the systems technology of integrated circuit technique and specific user, has the advantages such as volume is less, weight is lighter, power consumption is lower, reliability raising, performance raising, confidentiality enhancing, cost reduction compared with universal integrated circuit.
Existing switch is the centralized architecture adopted, and exchange chip is not only responsible for the exchanges data of link layer, is also responsible for network management and arranges.If need to carry out PoE to power, then adopt the mode of serial ports with the module communication of poe again, both consuming time, be not easy to again management.
Therefore, be necessary to design a kind of novel intelligent PoE switch.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of intelligent PoE switch and its implementation, the program meets IEEE802.3af standard and IEEE802.3at standard, support multiple AF/AT equipment [AF equipment, be exactly the equipment supporting IEEE802.3af standard, AT manages to be exactly the equipment supporting 802.3at standard], possess uninterrupted PoE function of supplying power, there is again web administration function simultaneously, there is very high reliability and good flexibility.
The technical solution of invention is as follows:
A kind of intelligent PoE switch, comprises data exchange module, PoE administration module, system management module and power module;
Data exchange module adopts exchanges data ASIC and ports-Extending ASIC, exchanges data ASIC to be connected by SS-SMII interface with ports-Extending ASIC;
PoE administration module adopts special PoE management asic, adopts Mode A power interface;
System management module adopts intelligent exchange web administration microcontroller, and namely MCU, MCU pass through I
2c interface connects PoE administration module, and MCU passes through MII interfacing data Switching Module, I
2c interface comprise a clock cable SCL and two data lines SDA_IN and SDA_OUT, MCU control interface comprise three control signal wire: LED flow latch, the enable and PoE of PoE resets;
Power module adopts the ups power of 48V direct current, one tunnel of ups power exports directly as the power supply of PoE administration module, the DC/DC modular converter that another road exports through ups power is converted to system power supply, for the bulk supply of intelligent PoE switch, comprise and powering to the data exchange module of intelligent poe switch, system management module.
Described Mode A power interface, refer to and to be powered by dead pair 4,5,7,8 line of netting twine RJ45 that (4,5,7,8 for idle line, paired appearance, therefore being called dead pair, line here refers to the holding wire of netting twine RJ45, totally 8 (4 to), 4 are wherein had to do data wire, remaining 4 (2 to) do the supply lines of PoE), 4,5 lines are positive pole, and 7,8 lines are negative pole.
Adopting between system management module and PoE administration module can light-coupled isolation, SCL with SDA_OUT is connected the I of MCU
2c interface, SDA_OUT is then simulated by another serial i O mouth and replaces;
PoE administration module adopts the PoE management asic supporting IEEE802.3af standard and IEEE802.3at standard.
An implementation method for intelligent PoE switch, adopts aforesaid intelligent PoE switch;
The web administration function of intelligence PoE switch comprises: account management, Port Management, PoE management, VLAN setting, network service quality arrange (QualityofService, QoS, service quality, be a kind of security mechanism of network, be used to a kind of technology solving the problem such as network delay and obstruction.), safety filtering and configuration backup/restore funcitons;
Described PoE management function comprises: the display of PoE state, PoE setting, PoE postpone power supply and arrange and PoE plan setting; The display of PoE state is used for checking PoE power supply maximum power and gross power, main power source consumed power, system mode, device temperature; PoE port numbers, state or enable, Mode A F/AT, priority, power are set in PoE is arranged; PoE postpones power supply setting and is used for arranging PoE port numbers, delayed mode or postponing enable, time of delay, and the delay that simultaneously list shows each port is powered information; PoE plan arranges and is used for arranging or checking that PoE plans, and plans to take week as planning cycle, to be accurate to hour.
The system architecture of intelligence PoE switch adopts four-layer structure:
The bottom is hardware driving layer, comprises device drives, interface driver, set timer;
The second layer is protocol layer, comprises uIP protocol stack, udp protocol, Network Time Protocol;
Third layer is application layer, comprises SSI, CGI application program of switch management, PoE management;
4th layer is service layer, comprises the switch management page and the user authentication page;
Exchanges data ASIC is operated in PHY pattern, and MAC layer management is controlled by system management module.
Beneficial effect:
Intelligent PoE switch system of the present invention comprises: exchanges data, PoE management, system management, power supply four modules.Data exchange module and PoE administration module adopt exchanges data ASIC (ApplicationSpecific Integrated Circuit respectively, application-specific integrated circuit (ASIC)) and ports-Extending ASIC and PoE management asic, complete basic exchanges data and PoE management function; System management module adopts intelligent exchange web administration MCU (Micro Control Unit, microcontroller), and utilize the web administration of SSI, CGI technology and uIP protocol realization switch, MCU passes through I
2c, MII Interface realization is to the intelligent management of data exchange module and PoE administration module; Power module adopts ups power to be respectively PoE power supply and system power supply is powered.The present invention not only has Web intelligent management function, also has uninterrupted PoE function of supplying power, and supports all types of AF/AT equipment completely, has very strong adaptability.
Adopt managing chip, exchange chip and PoE chip to carry out integrated scheme, realize intelligent management and the PoE function of supplying power of switch.
Data exchange module adopts exchanges data ASIC and ports-Extending ASIC framework thereof, and Switching Module can be made to carry out " heap cordwood system type " expansion.
System management module adopts I
2c, MII interface, by this succinct mode, reduces greatly size of code and the speed of service of system management, conveniently carries out the quick-setting of system;
Power module, can either ensure that PoE powers, and can carry out the short time again power when power cut-off.
There is following characteristics:
Web administration simple, intuitive of the present invention, complete function, possess the functions such as account management, Port Management, PoE management, VLAN setting, service quality setting, safety filtering, configuration backup/recovery, simultaneously, web administration also can meet the individual demand of user, and Port Management, PoE management all possesses the personal settings demand of each port.
PoE management of the present invention has good compatibility to various PD equipment, completes and supports meet the AF equipment of IEEE802.3af standard and meet the AT equipment of IEEE802.3at standard, can also support some expansions PD equipment; In addition, because PoE power supply is connected to ups power, the present invention supports uninterrupted PoE function of supplying power, has very strong adaptability.
The network upgrade function of switch program is supported in configuration management of the present invention, and can realize the remote upgrade of switch program, not only simple and convenient, also can be the ROMPaq that user provides latest edition, timely patch system leak, guarantees system safety.
Exchanges data is separated with system management by MII interface at a high speed by intelligent PoE switch of the present invention; Management is carried out with mutual by I2C and PoE module; And adopt the web agreement uIP agreement (only needing the internal memory of tens k) of lightweight, what can realize managing and realize is separated, both meet exchanges data at a high speed and PoE powers, the management only having a small amount of user just to use can have been met again function is set.
Accompanying drawing explanation
Fig. 1 is 16 mouthfuls of 10/100M intelligence PoE switch system block diagrams;
Fig. 2 is PoE power interface (Mode A);
Fig. 3 is 16 mouthfuls of 10/100M intelligence PoE switch software Organization Charts;
Fig. 4 (a) is main program flow chart;
Fig. 4 (b) is packet processing program flow chart;
Fig. 4 (c) is readjustment polling routine flow chart;
Fig. 5 is web administration webpage Organization Chart;
Embodiment
Below with reference to the drawings and specific embodiments, the present invention is described in further details:
Embodiment 1:
As Fig. 1-5,16 mouthfuls of 10/100M intelligence PoE switch system block diagrams as shown in Figure 1, this switch system comprises: exchanges data, PoE management, system management, power supply four modules.Data exchange module and PoE administration module adopt exchanges data ASIC and ports-Extending ASIC thereof and PoE management asic respectively, complete basic exchanges data and PoE management function; System management module adopts switch web administration MCU, and utilize the web administration of SSI, CGI technology and uIP protocol realization switch, MCU passes through I
2c, MII Interface realization is to the intelligent management of data exchange module and PoE administration module; Power module adopts ups power to be respectively PoE power supply and system power supply is powered.
1, data exchange module
Data exchange module adopts exchange data switching asic and ports-Extending ASIC framework thereof.Exchanges data ASIC can connect 8 road RJ45 interfaces, and ports-Extending ASIC can expand 8 road RJ45 interfaces again, and therefore system has 16 road RJ45 interfaces.The interface of exchanges data ASIC and ports-Extending ASIC is SS-SMII interface, and data exchange module and system management module interface are MII interface.
The exchange of management ASIC work section of data exchange module, in PHY pattern and MAC pattern, only completes physical layer switching task, can complete the base switch functions such as mac address table management, exchanges data under MAC layer pattern under PHY pattern.In the present invention, exchanges data ASIC is operated in PHY pattern, and MAC layer management is controlled by system management module.
2, PoE administration module
PoE administration module adopts the PoE management asic supporting IEEE802.3af standard and IEEE802.3at standard.The PoE management role that this PoE management asic energy complete independently is basic, passes through I simultaneously
2c bus communication accepts the control of system management module, realizes more senior PoE management function; In order to realize the isolation of PoE power supply, between PoE administration module and system management module, have employed light-coupled isolation measure.The ups power of what the PoE power supply of PoE module connect is power module, ensures uninterrupted PoE function of supplying power.In order to avoid the risk that the active equipment employing dead pair causes damage to PoE administration module or disturbs, PoE power interface takes Mode A power interface, and powered by dead pair 4,5,7,8 line of netting twine RJ45,4,5 lines are positive pole, 7,8 lines are negative pole, as shown in Figure 2.
This PoE management asic can complete the basic PoE management function such as identification, grading, power supply, port monitoring, power control, power-off in automatic mode; Can also realize under web administration pattern that port is enable, power controls, for the function such as electric delay, PoE plan.
3, power module
Power module comprises ups power, DC/DC change-over circuit, system power supply interface three parts.Wherein ups power is the core of power module, and when not having power-off, 220V electric main is converted to 48V direct current and exports by it, and be battery charging as required, when power is off, the battery discharge of ups power, same 48V direct current exports simultaneously.48V output voltage one tunnel of UPS is directly as PoE power supply, and another road is converted to system power supply through DC/DC.
4, system management
4.1 hardware
System management adopts switch web administration MCU, and it comprises a MII interface and an I
2c interface, MII interface is used for the management of data exchange module, I
2c interface is used for the management of PoE administration module.Can light-coupled isolation owing to adopting between system management module and PoE administration module, optical coupling isolation circuit has unidirectional, therefore I
2c bus splits into three lines, i.e. SCL (clock), SDA_IN (data input), SDA_OUT (data output), SCL with SDA_OUT is connected the I of MCU
2c interface, SDA_OUT is then simulated by another serial i O mouth and replaces.
4.2 software
The software architecture figure of system management as shown in Figure 3, is divided into four-layer structure, and the bottom is hardware driving layer, comprises device drives, interface driver, set timer etc.; The second layer is protocol layer, comprises uIP protocol stack, udp protocol, Network Time Protocol etc.; Third layer is application layer, mainly comprises SSI, CGI application program of switch management, PoE management; 4th layer is service layer, mainly comprises the switch management page, the user authentication page etc.; And switch configuration to manage in the in return machine system management software a relatively independent engineering, the executable file programming generated enters in the specific region of FLASH, this part program is only for the network upgrade process of switch program, and this part program of network upgrade process is not wiped free of.
4.2.1 application program
Application layer is operated on hardware driving and network protocol layer, and the power function that utilization SSI, CGI technology and uIP protocol stack realize switch management, PoE manages is also interactive with the web administration page.Therefore application program contains SSI file system and CGI file system, and CGI file system is responsible for the order or the request that process the web administration page, and SSI file system is responsible for CGI file system result to be embedded in dynamic web page.
As shown in Figure 4, Fig. 4 (a), 4 (b), 4 (c) are the flow charts of main program, packet processing program, readjustment polling routine to web administration application flows figure respectively.System electrification or after restarting, first program carries out every initialization operation to system, comprises the protocol stack initialization such as hardware device initialization, uIP, UDP, STP; Program can enter service major cycle afterwards, relates to a lot of network exchange management service here, and system clock plays an important role in these services, and PoE hypervisor is also in this major cycle; Service major cycle also can jump to firmware and upgrade and system reboot code segment, performs firmware and upgrades and system reset operation.
4.2.2Web administration page
Web administration webpage framework as shown in Figure 5, comprising: account management, Port Management, PoE management, VLAN setting, service quality setting, safety filtering, configuration backup/recover several functional module.Wherein PoE administration module function comprises: the display of PoE state, PoE setting, PoE postpone power supply and arrange and PoE plan.The display of PoE state can view PoE power supply maximum power (gross power), main power source consumed power, system mode, device temperature; PoE port numbers, state (or enable), pattern (AF/AT), priority, power can be set during PoE is arranged; PoE postpones power supply and arranges and can arrange PoE port numbers, delayed mode (or postponing enable), time of delay, also can the list delay that shows each port to power information simultaneously; Can arrange or check that PoE plans during PoE plan is arranged, plan to take week as planning cycle, to be accurate to hour;
4.2.3 configuration manager
Configuration management is as a relatively independent engineering, a part as systems soft ware is not run at ordinary times, only have when system perform switch firmware more newer command time just can perform, its task is exactly utilize dynamic web page to be uploaded in FLASH memory by network, when without the version updating or the upgrading that complete switch program when tip-off FLASH by the executable file for upgrading.
The executable file of configuration management engineering needs with downloader programming in FLASH memory, and program upgrade process it be not also wiped free of.After system executive upgrades instruction, configuration manager starts, then an erase operation can first be performed, the content of erasing is the program except address corresponding to configuration manager, wipe configuration manager executive program upload operation again successfully, appointment executable file is uploaded in FLASH, if successful operation programming jump is to switch hypervisor, otherwise again uploads executable file.
1. system composition
With reference to accompanying drawing 1, the integrated invention of native system comprises switch system and comprises: exchanges data, PoE management, system management, power supply four modules.Data exchange module and PoE administration module adopt exchanges data ASIC and ports-Extending ASIC thereof and PoE management asic respectively, complete basic exchanges data and PoE management function; System management module adopts switch web administration MCU, and utilize the web administration of SSI, CGI technology and uIP protocol realization switch, MCU passes through I
2c, MII Interface realization is to the intelligent management of data exchange module and PoE administration module; Power module adopts ups power to be respectively PoE power supply and system power supply is powered.
Described data exchange module adopts exchange data switching asic and ports-Extending ASIC framework thereof.Exchanges data ASIC can connect 8 road RJ45 interfaces, and ports-Extending ASIC can expand 8 road RJ45 interfaces again, and therefore system has 16 road RJ45 interfaces.The interface of exchanges data ASIC and ports-Extending ASIC is SS-SMII interface, and data exchange module and system management module interface are MII interface.
The exchange of management ASIC of data exchange module is operated in PHY pattern and MAC pattern, under PHY pattern, only complete physical layer switching task, can complete the base switch functions such as mac address table management, exchanges data under MAC layer pattern.In the present invention, exchanges data ASIC is operated in PHY pattern, and MAC layer management is controlled by system management module.
Described PoE administration module adopts the PoE management asic supporting IEEE802.3af standard and IEEE802.3at standard.The PoE management role that this PoE management asic energy complete independently is basic, passes through I simultaneously
2c bus communication accepts the control of system management module, realizes more senior PoE management function; In order to realize the isolation of PoE power supply, between PoE administration module and system management module, have employed light-coupled isolation measure.The ups power of what the PoE power supply of PoE module connect is power module, ensures uninterrupted PoE function of supplying power.
This PoE management asic can complete the basic PoE management function such as identification, grading, power supply, port monitoring, power control, power-off in automatic mode; Can also realize under web administration pattern that port is enable, power controls, for the function such as electric delay, PoE plan.
Described power module comprises ups power, DC/DC change-over circuit, system power supply interface three parts.Wherein ups power is the core of power module, and when not having power-off, 220V electric main is converted to 48V direct current and exports to switch system by it, and be battery charging as required, when power is off, the battery discharge of ups power, same 48V direct current exports simultaneously.48V output voltage one tunnel of UPS is directly as PoE power supply, and another road is system power supply through the DC/DC module converts of UPS, is the bulk supply (comprising data interaction module and system management module) of intelligent PoE switch.
Generally, the 220V of interchange is first converted to the 48V of direct current by UPS module, and then 48V is converted to voltage needed for modules, as 48V is converted to 24V, 12V, 5V etc. through DC/DC.These DC/DC module matured products.
Described system management module hardware components adopts switch web administration MCU, and it comprises a MII interface and an I
2c interface, MII interface is used for the management of data exchange module, I
2c interface is used for the management of PoE administration module.Can light-coupled isolation owing to adopting between system management module and PoE administration module, optical coupling isolation circuit has unidirectional, therefore I
2c bus splits into three lines, i.e. SCL (clock), SDA_IN (data input), SDA_OUT (data output), SCL with SDA_OUT is connected the I of MCU
2c interface, SDA_OUT is then simulated by another serial i O mouth and replaces.
The software architecture figure of described system management module software section as shown in Figure 3, is divided into four-layer structure, and the bottom is hardware driving layer, comprises device drives, interface driver, set timer etc.; The second layer is protocol layer, comprises uIP protocol stack, udp protocol, Network Time Protocol etc.; Third layer is application layer, mainly comprises SSI, CGI application program of switch management, PoE management; 4th layer is service layer, mainly comprises the switch management page, the user authentication page etc.; And switch configuration to manage in the in return machine system management software a relatively independent engineering, the executable file programming generated enters in the specific region of FLASH, this part program is only for the network upgrade process of switch program, and this part program of network upgrade process is not wiped free of.
2.Web manages application development
Web administration application development platform is KeilC51V9.0, and hardware platform is the intelligent exchange management MCU of employing 51 kernel.According to accompanying drawing 4 program flow diagram modularized design main program, packet processing program, readjustment polling routine.System electrification or after restarting, first program carries out every initialization operation to system, comprises the protocol stack initialization such as hardware device initialization, uIP, UDP, STP; Program can enter service major cycle afterwards, relates to a lot of network exchange management service here, and system clock plays an important role in these services, and PoE hypervisor is also in this major cycle; Service major cycle also can jump to firmware and upgrade and system reboot code segment, performs firmware and upgrades and system reset operation.
3.Web administration page is developed
Web administration webpage Organization Chart as shown in Figure 5, is mainly divided into account management, Port Management, PoE management, VLAN setting, service quality setting, safety filtering, configuration backup/recover several part.
Account management comprises account login, user's configuration, system IP configuration, system mode, default setting, firmware upgrades, equipment restarts function.User is configured for and arranges username and password; System IP configuration can arrange IP address, subnet mask, gateway, IP configuration mode (static or DHCP); MAC Address and switch version information is shown in system mode; Then the program of redaction uploads in FLASH by network by the program (note: firmware refresh routine is not wiped free of itself) that firmware updating function can wipe original version, the network upgrade of completion system software.
Port Management comprises port arrangement, port monitoring, port statistics, bandwidth control, broadcast storm controlling functions.The operator scheme of physical port can be set in port arrangement, comprise the functions such as port is enable, speed is arranged, partly/full duplex setting, current control, time-out, address learning; Port monitoring comprises destination interface monitoring, bag monitoring and source port monitoring; Bandwidth controls to allow to arrange each port bandwidth, and settings are 1 ~ 255, arrange bandwidth and equal true bandwidth divided by these settings; Broadcast storm controls for stopping too much broadcast packet, and broadcast packet arranges threshold value from 1 ~ 63, and the broadcast packet exceeding the corresponding threshold value of port will be dropped.
PoE management comprises PoE state, PoE is arranged, PoE postpones power supply setting, PoE plan function.The display of PoE state can view PoE power supply maximum power (gross power), main power source consumed power, system mode, device temperature; PoE port numbers, state (or enable), pattern (AF/AT), priority, power can be set during PoE is arranged; PoE postpones power supply and arranges and can arrange PoE port numbers, delayed mode (or postponing enable), time of delay, also can the list delay that shows each port to power information simultaneously; Can arrange or check that PoE plans during PoE plan is arranged, plan to take week as planning cycle, to be accurate to hour.
VLAN setting comprises the setting of VLAN pattern, VLAN ID is arranged.Selected data exchange of management ASIC supports two kinds of VLAN patterns: Tag pattern and Port pattern, can increase or delete Tag under Tag pattern.
Service quality setting comprises priority mode setting, grade of service configuration, selects based on the Port Profile of the grade of service.Priority mode has first in first out, first high rear low, 4 queue poll Three models; Service priority (high, medium and low) and the Tag symbol of each port can be set in grade of service configuration; Port Profile selects the treaty override level that can arrange each group of port, is also divided into high, medium and low three grades.
Safety filtering comprises mac address filter, TCP/UDP filtering function.Warn when " multiplex broadcasting " system of generation can eject and abandon the packet that this source port sends; TCP/UDP filters the specified protocol packet that can arrange each port and need to filter or allow to pass through.
Configuration backup/recovery comprises firmware and upgrades, exits, recovers default setting function.
Web administration page development flow process is as follows:
1) edit htm file, and insert SSI instruction;
2) in system call back function, this webpage is stated, that is: #include " xxx_htm.h ";
3) call back function and htm file chaining is set up;
4) use Cod2C.bat instrument that htm file is changed into xxx_htm.c, xxx_htm.h document;
5) recompilate link project file, and generate executable file;
6) Web upgrades switch program.
Claims (3)
1. an intelligent PoE switch, is characterized in that, comprises data exchange module, PoE administration module, system management
Module and power module;
Data exchange module adopts exchanges data ASIC and ports-Extending ASIC, exchanges data ASIC to be connected by SS-SMII interface with ports-Extending ASIC;
PoE administration module adopts special PoE management asic, adopts Mode A power interface;
System management module adopts intelligent exchange web administration microcontroller, and namely MCU, MCU pass through I
2c interface connects PoE administration module, and MCU passes through MII interfacing data Switching Module, I
2c interface comprise a clock cable SCL and two data lines SDA_IN and SDA_OUT, MCU control interface comprise three control signal wire: LED flow latch, the enable and PoE of PoE resets;
Power module adopts the ups power of 48V direct current, one tunnel of ups power exports directly as the power supply of PoE administration module, the DC/DC modular converter that another road exports through ups power is converted to system power supply, for the bulk supply of intelligent PoE switch, comprise and powering to the data exchange module of intelligent poe switch, system management module;
Described Mode A power interface, refer to and to be powered by dead pair 4,5,7,8 line of netting twine RJ45,4,5 lines are positive pole, and 7,8 lines are negative pole;
Adopting between system management module and PoE administration module can light-coupled isolation, SCL with SDA_OUT is connected the I of MCU
2c interface, SDA_OUT is then simulated by another serial i O mouth and replaces;
PoE administration module adopts the PoE management asic supporting IEEE802.3af standard and IEEE802.3at standard.
2. an implementation method for intelligent PoE switch, is characterized in that, adopts intelligent PoE switch according to claim 1;
The web administration function of intelligence PoE switch comprises: account management, Port Management, PoE management, VLAN setting, network service quality setting, safety filtering and configuration backup/restore funcitons;
Described PoE management function comprises: the display of PoE state, PoE setting, PoE postpone power supply and arrange and PoE plan setting; The display of PoE state is used for checking PoE power supply maximum power and gross power, main power source consumed power, system mode, device temperature; PoE port numbers, state or enable, Mode A F/AT, priority, power are set in PoE is arranged; PoE postpones power supply setting and is used for arranging PoE port numbers, delayed mode or postponing enable, time of delay, and the delay that simultaneously list shows each port is powered information; PoE plan arranges and is used for arranging or checking that PoE plans, and plans to take week as planning cycle, to be accurate to hour.
3. the implementation method of intelligent PoE switch according to claim 2, is characterized in that, the system architecture of intelligent PoE switch adopts four-layer structure:
The bottom is hardware driving layer, comprises device drives, interface driver, set timer;
The second layer is protocol layer, comprises uIP protocol stack, udp protocol, Network Time Protocol;
Third layer is application layer, comprises SSI, CGI application program of switch management, PoE management;
4th layer is service layer, comprises the switch management page and the user authentication page;
Exchanges data ASIC is operated in PHY pattern, and MAC layer management is controlled by system management module.
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| CN103368872A (en) * | 2013-07-24 | 2013-10-23 | 广东睿江科技有限公司 | Data packet forwarding system and method |
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