阅读说明：本技术 一种国产化12端口lrm三层千兆网络交换模块 (Domestic 12-port LRM three-layer gigabit network switching module ) 是由 张凌烽 于 2021-09-07 设计创作，主要内容包括：本发明涉及一种国产化12端口LRM三层千兆网络交换模块,属于网络交换技术领域。本发明提供的一种采用LRM连接器的12端口10M/100M/1000Mbps自适应的三层千兆网络交换模块,使用该网络交换模块可完成控制设备间的网络交换需求,并且该网络交换模块为全国产化,带有12个10M/100M/1000Mbps自适应的千兆网络交换端口,具有网络路由功能；可以通过2K1000的调试串口以命令行的方式对网络交换模块进行配置,包括各端口的速率、全双工/半双工和网络路由设置等。(The invention relates to a domestic 12-port LRM three-layer gigabit network switching module, belonging to the technical field of network switching. The invention provides a 12-port 10M/100M/1000Mbps self-adaptive three-layer gigabit network switching module adopting an LRM connector, which can complete the network switching requirement among control devices, is nationwide, is provided with 12 10M/100M/1000Mbps self-adaptive gigabit network switching ports and has a network routing function; the network switching module can be configured in a command line mode through a debugging serial port of 2K1000, and the configuration comprises the speed of each port, full duplex/half duplex, network routing setting and the like.)

1. A home-made 12-port LRM three-layer gigabit network switching module is characterized by comprising a network switching chip KD5660 and a processor;

the chip 2K1000 is used as a processor to run a network layer protocol and is responsible for three-layer forwarding, the exchange chip KD5660 is configured according to the requirements of the protocol and management, and an MAC (media access control) table, an ARP (address resolution protocol) table and a routing table built in the exchange chip KD5660 are maintained; and the KD5660 is used as a network exchange chip and is responsible for two-layer exchange.

2. The network switching module according to claim 1, wherein after the network switching module is powered on, the processor 2K1000 is capable of broadcasting an ARP query frame to all ports, and obtaining an IP address and an MAC address of each port connection device according to an ARP message replied by each port; the processor 2K1000 can establish a MAC table, an ARP table, and a routing table inside the switching chip KD5660 according to the IP address and the MAC address of the device connected to each port.

3. The network switching module of claim 2, wherein after receiving the IP packet, the switching chip KD5660 is able to query a built-in MAC table, ARP table and routing table according to the key fields in the IP packet, so as to know how to process the IP packet, whether to forward the packet from one of the ports or send the packet to the processor 2K1000 for further processing.

4. The network switching module according to claim 3, wherein after the switching chip KD5660 receives the IP packet, the specific processing manner is: comparing the destination IP address of the IP message with the mask code in the prefix field of the routing table item, then comparing with the IP address in the prefix field, if equal, matching the message with the route; when one IP message is matched with a plurality of routes, matching is carried out according to the principle that the mask length is longest, the priority is highest and the route overhead is minimum; when an IP message matches a route, acquiring an MAC address and an output port of next hop equipment according to an output port number and a next hop IP address in a routing table entry, and forwarding the message; when an IP packet does not have a matching route, the packet is sent to the processor 2K1000, the processor 2K1000 sends an ARP request packet of the destination IP of the packet to a network connected to all ports to obtain an MAC address of the destination IP, if a network node of the destination IP exists in the network, the processor 2K1000 receives an ARP reply packet, adds a new routing table entry in a routing table of the switching chip KD5660, and forwards the packet.

5. The network switching module of claim 4, further comprising a PHY chip KD3004 connected to KD5660, a FLASH, DDR3, RS-232 transceiver connected to 2K1000, a network transformer connected to PHY chip KD3004, and an LRM connector connected to the network transformer.

6. The network switching module of claim 5, wherein a Beijing mega innovative GD25Q127CSJG is used as boot FLASH, and a Beijing mega innovative GD9FU2G8F3AMGI is used as data storage FLASH; adopting SM41J256M16M of Shenzhen Guomi as DDR 3; adopting SM3232 of Shenzhen Guomi as an RS-232 transceiver; HST-24022SXCR of Unitaxing is adopted as a gigabit network transformer; LRM1-A100H6B-B110H4B-T1 from 3412 manufacturer was used as the LRM connector.

7. The network switch module of claim 5, further comprising a power module implemented with SM4644MPY and SM4620AMPV of Shenzhen national micro.

8. The network switching module of claim 7 wherein the module is an LRM board type of LRM connector having a physical dimension of 144 x 138.3 mm.

9. The network switch module of claim 7, wherein the gigabit network switch port with 12 adaptation of 10M/100M/1000Mbps has network routing capability.

10. A network switching method implemented with a network switching module according to any of claims 1 to 9.

Technical Field

The invention belongs to the technical field of network switching, and particularly relates to a domestic 12-port LRM three-layer gigabit network switching module.

Background

The network switching technology is widely applied to the fields of military equipment, industrial equipment and the like, is an important means for information transmission, and equipment is interconnected through a gigabit Ethernet interface and a gigabit network switching module. In view of the factors of forbidden operation of imported components and the like, the network switching module is required to have the characteristics of localization and autonomous controllability.

Disclosure of Invention

Technical problem to be solved

The technical problem to be solved by the invention is as follows: an LRM three-layer gigabit network switching module which meets the network switching requirement among control devices, is nationwide and has a network routing function is designed.

(II) technical scheme

In order to solve the technical problem, the invention provides a domestic 12-port LRM three-layer gigabit network switching module, which comprises a network switching chip KD5660 and a processor;

the chip 2K1000 is used as a processor to run a network layer protocol and is responsible for three-layer forwarding, the exchange chip KD5660 is configured according to the requirements of the protocol and management, and an MAC (media access control) table, an ARP (address resolution protocol) table and a routing table built in the exchange chip KD5660 are maintained; and the KD5660 is used as a network exchange chip and is responsible for two-layer exchange.

Preferably, after the network switching module is powered on, the processor 2K1000 may broadcast an ARP query frame to all the ports, and obtain an IP address and an MAC address of each port connection device according to an ARP message replied by each port; the processor 2K1000 can establish a MAC table, an ARP table, and a routing table inside the switching chip KD5660 according to the IP address and the MAC address of the device connected to each port.

Preferably, after receiving the IP packet, the switching chip KD5660 can query the built-in MAC table, ARP table, and routing table according to the key fields in the IP packet, so as to know how to process the IP packet, and whether to forward the packet from one of the ports or send the packet to the processor 2K1000 for further processing.

Preferably, after the switching chip KD5660 receives the IP packet, the specific processing mode is: comparing the destination IP address of the IP message with the mask code in the prefix field of the routing table item, then comparing with the IP address in the prefix field, if equal, matching the message with the route; when one IP message is matched with a plurality of routes, matching is carried out according to the principle that the mask length is longest, the priority is highest and the route overhead is minimum; when an IP message matches a route, acquiring an MAC address and an output port of next hop equipment according to an output port number and a next hop IP address in a routing table entry, and forwarding the message; when an IP packet does not have a matching route, the packet is sent to the processor 2K1000, the processor 2K1000 sends an ARP request packet of the destination IP of the packet to a network connected to all ports to obtain an MAC address of the destination IP, if a network node of the destination IP exists in the network, the processor 2K1000 receives an ARP reply packet, adds a new routing table entry in a routing table of the switching chip KD5660, and forwards the packet.

Preferably, the system further comprises a PHY chip KD3004 connected with KD5660, a FLASH, DDR3 and RS-232 transceiver connected with 2K1000, a network transformer connected with PHY chip KD3004, and an LRM connector connected with the network transformer.

Preferably, GD25Q127CSJG which is easy to innovate in Beijing Mr is used as boot FLASH, and GD9FU2G8F3AMGI which is easy to innovate in Beijing Mr is used as data storage FLASH; adopting SM41J256M16M of Shenzhen Guomi as DDR 3; adopting SM3232 of Shenzhen Guomi as an RS-232 transceiver; HST-24022SXCR of Unitaxing is adopted as a gigabit network transformer; LRM1-A100H6B-B110H4B-T1 from 3412 manufacturer was used as the LRM connector.

Preferably, the power supply module is further included and is realized by adopting SM4644MPY and SM4620AMPV of Shenzhen national micro.

Preferably, the module is of LRM board type with an LRM connector having a physical dimension of 144 x 138.3 mm.

Preferably, the gigabit network switch port with 12 10M/100M/1000Mbps adaptation has network routing functionality.

The invention also provides a network switching method realized by utilizing the network switching module.

(III) advantageous effects

The invention provides a 12-port 10M/100M/1000Mbps self-adaptive three-layer gigabit network switching module adopting an LRM connector, which can complete the network switching requirement among control devices, is nationwide, is provided with 12 10M/100M/1000Mbps self-adaptive gigabit network switching ports and has a network routing function; the network switching module can be configured in a command line mode through a debugging serial port of 2K1000, and the configuration comprises the speed of each port, full duplex/half duplex, network routing setting and the like.

Drawings

Fig. 1 is a block diagram of a home-made 12-port LRM triple-layer gigabit network switch module according to the present invention.

Detailed Description

In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The invention designs a 12-port LRM three-layer gigabit network switching module, which is externally led out with 12 paths of gigabit Ethernet interfaces and has a network routing function.

As shown in fig. 1, the home-made 12-port LRM three-layer gigabit network switch module provided by the present invention is a 12-port 10M/100M/1000Mbps adaptive three-layer gigabit network switch module using an LRM connector, which can fulfill the network switch requirement among control devices, and is nationwide, with 12 10M/100M/1000Mbps adaptive gigabit network switch ports, having a network routing function; the network switching module can be configured in a command line mode through a debugging serial port of 2K1000, and the configuration comprises the speed of each port, full duplex/half duplex, network routing setting and the like.

The module comprises a network exchange chip KD5660, a PHY chip KD3004, a processor, a FLASH, a DDR3, an RS-232 transceiver, a power supply chip, a network transformer, an LRM connector and the like, wherein the KD5660 of Beijing Dongtong earth technology is used as the network exchange chip, the KD3004 of Beijing Dongtong earth technology is used as the PHY chip, the 2K1000 of Longxin Zhongke is used as the processor, the GD25Q127CSJG of Beijing MJ easy innovation is used as the boot FLASH, the GD9FU2G8F3AMGI of Beijing Mb easy innovation is used as the data storage FLASH, the SM41J256M16M of Shenzhen Min is used as the data storage FLASH, the SM3232 of Shenzhen Min Ming is used as the RS-232 transceiver, the HST-24022SXCR of Union Ministry is used as the data storage FLASH, the SM4644 GpMPY and SM 4620V of Shenzhen Min are used as the power supply module, and the LRM 1-596A 1-596 of the LRM 3970H 596-5910.

The chip 2K1000, as a processor, runs a network layer protocol, is responsible for three-layer forwarding, configures the switch chip KD5660 according to the requirements of the protocol and management, and maintains various tables such as an MAC table, an ARP table, a routing table and the like established inside the switch chip KD 5660. And the KD5660 is used as a network exchange chip and is responsible for two-layer exchange.

After the network switching module is started, the processor 2K1000 broadcasts an ARP inquiry frame to all ports, and obtains the IP address and the MAC address of each port connection device according to the ARP message replied by each port. The processor 2K1000 establishes an MAC table, an ARP table, and a routing table inside the switching chip KD5660 according to the IP address and the MAC address of the device connected to each port.

After receiving the IP packet, the switching chip KD5660 queries the built-in MAC table, ARP table, and routing table according to the key fields in the IP packet, thereby knowing how to process the IP packet, and whether to forward the packet from a certain port or send the packet to the processor 2K1000 for further processing.

Specifically, when the switching chip KD5660 receives an IP packet, the destination IP address of the IP packet is compared with the mask in the prefix field of the routing table entry, and then compared with the IP address in the prefix field, and if equal, the packet matches the route; when one IP message is matched with a plurality of routes, matching is carried out according to the principle that the mask length is longest, the priority is highest and the route overhead is minimum; when an IP message matches a route, acquiring an MAC address and an output port of next hop equipment according to an output port number and a next hop IP address in a routing table entry, and forwarding the message; when an IP packet does not have a matching route, the packet is sent to the processor 2K1000, the processor 2K1000 sends an ARP request packet of the destination IP of the packet to a network connected to all ports to obtain an MAC address of the destination IP, if a network node of the destination IP exists in the network, the processor 2K1000 receives an ARP reply packet, adds a new routing table entry in a routing table of the switching chip KD5660, and forwards the packet.

The module adopts an LRM plate type of an LRM connector, and the external dimension is 144 x 138.3 mm; the 12-port 10M/100M/1000Mbps adaptive network routing function.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.