CN116366708B - System and method for dynamically switching entity equipment in network target range virtual-real combined scene - Google Patents
System and method for dynamically switching entity equipment in network target range virtual-real combined scene Download PDFInfo
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Abstract
The invention discloses a system and a method for dynamically switching entity equipment in a network shooting range virtual-real combination scene. The system comprises a scene switching service module and a network switching proxy module; the scene switching service module is used for providing a scene switching service interface, and the interface receives an old scene IP address, a mac address and virtual network identification parameters of the entity equipment; after receiving a scene switching request of the network target range platform, the scene switching service module constructs and sends a special arp request packet according to the input interface parameters; the network switching proxy module is used for monitoring an arp message on a network card of the entity equipment, releasing a local IP address when receiving that a source IP is an agreed IP and a target address is the local address, and acquiring a new IP address through a DHCP. The invention realizes that one entity device can be automatically switched among a plurality of running scene examples as required, and the manual configuration of a user is not needed, so that the use complexity is reduced.
Description
Technical Field
The invention relates to the technical field of computer network technology, in particular to a system and a method for dynamically switching entity equipment in a virtual-actual combined scene of a network shooting range.
Background
In a network target range environment, a large number of entity devices exist, and the entity devices can be connected into a virtual target range scene in a virtual-real combination mode. Because of the limited number of physical devices, one physical device may be used in multiple range scenarios, with the network configuration of the physical device changing when used in different scenarios.
As shown in fig. 1, the virtual-real combination is currently implemented mainly by adopting a Vlan network scheme, that is, a physical switch port connected to a real device is configured as an Access port, and the Vlan Tag of the physical switch port is consistent with the Tag number of the port on the virtual switch in the scene, so that the traffic of the virtual network can be guided to the physical switch.
Under the existing scheme, the IP address of the installation device is allocated by the DHCP service of the virtual network in the scenario, which is not problematic when the field Jing Di is started once, because the entity device always sends a DHCP request to acquire the IP address when the entity device does not have the IP address, but when the entity device acquires the IP address, the user switches to another scenario, and because the lease time of the IP address of the installation device may not have a lease period, the installation device does not immediately send a DHCP request to acquire the IP address in the new scenario, so that the installation device cannot be connected to the installation device in the new scenario, and only the user can manually update the IP address on the installation device or restart the network service of the installation device to acquire the IP address again. This also results in the physical device being able to be used only for a fixed scene and not being able to flexibly switch between scenes.
Disclosure of Invention
The invention aims to: aiming at the problems existing in the prior art, the invention aims to provide a system and a method for dynamically switching entity equipment in a virtual-real combined scene of a network target range, so that the network information of the entity equipment can be automatically switched after the scene is switched.
The invention provides a dynamic switching system of entity equipment in a virtual-real combined scene of a network target range, which comprises a scene switching service module and a network switching proxy module; the scene switching service module is deployed on a control server of the network target range platform, and the network switching agent module is deployed on the entity equipment; the control server is connected with the entity equipment through a physical switch;
the scene switching service module is used for providing a scene switching service interface, and the interface receives an old scene IP address, a mac address and a virtual network identification parameter of the entity equipment; after receiving a scene switching request of a network target range platform, constructing and sending an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address;
the network switching proxy module is used for monitoring an arp message on a network card of the entity equipment, releasing a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquiring a new IP address from a DHCP server through a local DHCP client.
Preferably, the network switching agent module monitors at a preset appointed port after configuring a new IP address; and after the scene switching service module sends the arp request packet, detecting whether the appointed port on the new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to a network target range platform after the connection.
Preferably, the source IP address in the arp request packet is a contracted IP address, the source mac address is a contracted or random mac address, the target mac address is a mac address of the entity device, the target IP address is an IP address of the entity device in an old scenario, and the Vlan is an identifier of the virtual network.
Preferably, the configuration file of the DHCP server is configured with an IP address allocated to the entity device in the switched new network target scene and a correspondence relationship between mac addresses of the entity device.
Based on the same inventive concept, the invention also provides a method for dynamically switching entity equipment in a virtual-real combined scene of a network target range, which is characterized by comprising the following steps:
after the network target range platform receives an instruction of switching the entity equipment by a user, configuring a switch port and DHCP server information connected with the entity equipment according to network information of a new scene;
after the configuration is completed, the network target range platform transmits the old scene IP address, mac address and virtual network identification parameters of the entity equipment;
after receiving a call request of the network target range platform, a control server of the network target range platform constructs and sends an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address;
the entity equipment monitors an arp message on a network card of the entity equipment in real time, releases a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquires a new IP address from a DHCP server through a local DHCP client.
Preferably, the method further comprises: after the entity equipment is configured with a new IP address, monitoring is carried out on a preset appointed port; after the control server of the network target station platform sends the arp request packet, detecting whether the appointed port on the new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to the network target station platform after the communication.
Preferably, the source IP address in the arp request packet is a contracted IP address, the source mac address is a contracted or random mac address, the destination mac address is a mac address of the entity device, and the destination IP address is an IP address of the entity device in the old scenario.
Preferably, the configuring the switch port and DHCP server information connected to the entity device according to the network information of the new scenario includes: according to the network information of the new scene, configuring a switch port connected with the entity equipment as an access port, and configuring an allowed Vlan as a virtual network identifier; and writing the corresponding relation between the IP address allocated for the entity equipment in the new scene and the mac address of the entity equipment into the configuration file of the corresponding network DHCP server side.
Based on the same inventive concept, the invention also provides a network target range system, which comprises a control server as a network target range control node and a physical device connected with the control server through a physical switch, wherein the control server is provided with a network target range platform; the control server comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is realized when being loaded to the processor: receiving an old scene IP address, a mac address and a virtual network identification parameter of entity equipment; after receiving a scene switching request of a network target range platform, constructing and sending an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address;
the entity device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented when loaded into the processor: monitoring an arp message on a network card of entity equipment, releasing a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquiring a new IP address from a DHCP server through a local DHCP client
Preferably, the computer program on the entity device is further implemented when loaded into the processor: after a new IP address is configured, monitoring is carried out on a preset appointed port; the computer program on the control server when loaded into the processor also implements: after the arp request packet is sent, whether the appointed port on the new IP address of the entity equipment can be communicated or not is detected, and after the communication, a message of successful IP address switching is pushed to the network target range platform.
In summary, the beneficial effects of the invention are as follows: aiming at the problem that the entity equipment cannot sense that the scene is switched after the scene is switched and possibly the network is not enabled after the scene is switched, the entity equipment can sense that the scene is switched and make corresponding configuration in time by constructing a special arp request packet and notifying the entity equipment of the scene switching information through an arp protocol. The network data packet is monitored at the entity equipment end through the network switching agent, and the original manual operation is changed into automatic operation, so that the complexity of the use of a user is reduced. The invention supports the switching of the entity equipment among a plurality of running scene examples, and the network configuration of the entity equipment can be automatically switched after the scene switching without manual configuration of a user.
Drawings
FIG. 1 is a prior art access schematic diagram of an entity device;
FIG. 2 is an access schematic diagram of an entity device in the present invention;
fig. 3 is a flow chart of dynamic switching of entity devices in the present invention.
Detailed Description
The following describes in detail the embodiments of the present invention with reference to the drawings.
Examples: the invention provides a method for dynamically switching entity equipment in a virtual-real combined scene of a network target range, which comprises the following steps:
after the network target range platform receives an instruction of switching the entity equipment by a user, configuring a switch port and DHCP server information connected with the entity equipment according to network information of a new scene;
after the configuration is completed, the network target range platform transmits the old scene IP address, mac address and virtual network identification parameters of the entity equipment;
after receiving a call request of the network target range platform, a control server of the network target range platform constructs and sends an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address;
the entity equipment monitors an arp message on a network card of the entity equipment in real time, releases a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquires a new IP address from a DHCP server through a local DHCP client.
After the entity equipment is configured with a new IP address, monitoring is carried out on a preset appointed port; after the control server of the network target station platform sends the arp request packet, detecting whether the appointed port on the new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to the network target station platform after the communication.
The source IP address in the arp request packet is a contracted IP address, the source mac address is a contracted or random mac address, the target mac address is a mac address of the entity device, and the target IP address is an IP address of the entity device in an old scene.
The configuration of the switch port and the DHCP server information connected to the entity device according to the network information of the new scenario includes: according to the network information of the new scene, configuring a switch port connected with the entity equipment as an access port, and configuring an allowed Vlan as a virtual network identifier; and writing the corresponding relation between the IP address allocated for the entity equipment in the new scene and the mac address of the entity equipment into the configuration file of the corresponding network DHCP server side.
As shown in fig. 2, the present invention further provides a dynamic switching system for entity devices in a virtual-real combination scene of a network target range, which monitors network traffic on the entity devices by deploying a network switching proxy module on the entity devices, and invokes a system command to re-DHCP to acquire a new IP address after receiving traffic of special network switching. The system mainly comprises a scene switching service module arranged on a control server of the network target range platform and a network switching agent module arranged on the entity equipment; the scene switching service module is used for providing a scene switching service interface, and the interface receives an old scene IP address, a mac address and virtual network Vlan Tag parameters of the entity equipment; after receiving a scene switching request of a network target range platform, the scene switching service module constructs and sends an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address; the network switching proxy module is used for monitoring an arp message on the network card of the entity equipment, releasing the local IP address when the source IP address is a contracted IP address and the target address is a local address is received, and acquiring a new IP address from the DHCP server through the local DHCP client.
Further, in order to ensure that the IP address switching is successful, the network switching proxy module monitors a preset appointed port after configuring a new IP address; after the scene switching service module sends an arp request packet, detecting whether a contracted port on a new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to a network target range platform after the connection.
Specifically, as shown in fig. 3, the entity device network dynamic switching flow:
1. the target platform deploys a scene switching service on the control server in advance, the scene switching service is connected to the trunk port of the virtual switch, and a network switching agent program is installed and started on the entity device.
2. The target range platform can pre-record port information of the entity equipment to the switch and mac address information of the entity equipment.
3. When the scene is started for the first time, the target range platform allocates an IP address to the entity equipment, and records the IP address into a database as the current IP of the entity equipment.
4. When a new scene containing entity equipment is started, the target range platform firstly configures a switch port connected with the installation equipment as an access port according to network information of the new scene, and configures an allowed vlan.
5. The target platform allocates a new IP address to the entity device, modifies the original current IP in the database to an old IP, and records the newly allocated IP as the current IP.
6. And the target range platform writes the corresponding relation between the newly allocated IP address and the MAC address of the entity equipment into a configuration file of the corresponding network dhcp service.
7. When the new scene is started, the target range platform calls an interface of the scene switching service, and the old IP address of the entity equipment, the mac address of the entity equipment and vlan tag parameters to which the virtual network belongs are transmitted.
8. When the scene switching service receives the request, it will call the scapy library to construct an arp unicast request packet, the source IP of the packet is the agreed 169.254.1.1 (the agreed IP is used for the identification of the special function, other IP addresses in the system are not in conflict), the source mac is the agreed fc:16:3e:fc:fc or random address, the target address is the IP address 10.100.7.167 of the entity device in the previous scene, the mac address fa of the entity device of the target mac address is 16:3e:ed:e3:79, and the vlan of the packet is the vlan tag 101 of the virtual network.
Arp package example:
packet = Ether(src='fc:16:3e:fc:fc:fc', dst='fa:16:3e:ed:e3:79') / Dot1Q(vlan=101) / ARP(op=1, hwsrc="fc:16:3e:fc:fc:fc", psrc="169.254.1.1" , hwdst="fa:16:3e:ed:e3:79", pdst=" 10.100.7.167")
send(packet, inter=0.2, count=2)
src in Ether is the source mac address, dst is the target mac address; the vlan in the Dot1Q is the vlan tag of the virtual network; op=1 in ARP indicates that the packet is an ARP request packet, hwsrc is a source mac address, psrc is a source IP address, hwdst is a target mac address, and pdst is a target IP address; the Send method is used for sending out the message, wherein the inter indicates that the packet sending interval is 0.2 seconds, and the count indicates that the message is sent for 2 times.
The arp request packet may pass through the virtual switch and the physical switch and may eventually be received by the physical device.
10. The network switching proxy service on the entity device monitors the arp message on the network card in real time, unpacks the message after the network switching proxy service monitors the arp message, and ignores the message if the source IP in the message is not the agreed 169.254.1.1 or the target IP is not the IP address local to the entity device.
11. If the source IP in the message is contracted 169.254.1.1 and the destination IP address is an IP address local to the entity device, the network switching agent will invoke a system command to release the IP address of the entity device. Command example:
ipconfig /release
12. after the IP address is released, the network switching agent re-invokes the local command to acquire the new IP address through the dhcp
Command example:
ipconfig /renew
13. the dhcp client program local to the entity device will resend the dhcp request packet to the dhcp service of the corresponding network.
14. After receiving the request, the DHCP service checks the local configuration file, finds a record corresponding to the mac address of the entity device, and replies the IP address to the entity device.
15. And after receiving the new IP address replied by the DHCP service, the entity equipment configures the new IP address to the local network card.
16. The network switching agent program can monitor the port of the local machine 9016 at the same time, the scene switching service can start the address detection service after sending the arp packet, and the socket polling is used for detecting whether the port 9016 on the target IP address can be communicated.
17. If 9016 ports cannot be communicated, the fact that the switching of the mounting device is not completed is indicated, and the next round of detection is continued to be waited. If the communication is possible, the entity equipment is successfully switched, and the scene switching service pushes the message of the successful address switching to the target range platform and sends the message to the user interface through the target range platform. The switching of the entity equipment in the scene is completed.
The invention also provides a network target range system, which comprises a control server serving as a network target range control node and provided with a network target range platform, and entity equipment connected with the control server through a physical switch; the control server comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented when loaded into the processor: providing a scene switching service interface, after receiving a scene switching request of a network target range platform, constructing and sending an arp request packet according to the input interface parameters, wherein a source IP address in the arp request packet is a preset appointed IP address; the physical device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented when loaded into the processor: and monitoring an arp message on a network card of the entity equipment, releasing the local IP address when the source IP address is a contracted IP address and the target mac address is a local mac address, and acquiring a new IP address from a DHCP server through a local DHCP client.
The computer program on the physical device when loaded into the processor also implements: after a new IP address is configured, monitoring is carried out on a preset appointed port; the computer program on the control server, when loaded into the processor, also implements: after the arp request packet is sent, whether the appointed port on the new IP address of the entity equipment can be communicated is detected, and after the communication, a message of successful IP address switching is pushed to the network target range platform.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The system for dynamically switching the entity equipment in the virtual-real combined scene of the network target range is characterized by comprising a scene switching service module and a network switching proxy module; the scene switching service module is deployed on a control server of the network target range platform, and the network switching agent module is deployed on the entity equipment; the control server is connected with the entity equipment through a physical switch;
the scene switching service module is used for providing a scene switching service interface, and the interface receives an old scene IP address, a mac address and a virtual network identification parameter of the entity equipment; after a scene switching request of a network target range platform is received, constructing and sending an arp request packet according to an incoming interface parameter, wherein a source IP address in the arp request packet is a contracted IP address, a source mac address is a contracted or random mac address, a target mac address is a mac address of entity equipment, and the target IP address is an IP address of the entity equipment in an old scene;
the network switching proxy module is used for monitoring an arp message on a network card of the entity equipment, releasing a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquiring a new IP address from a DHCP server through a local DHCP client.
2. The system for dynamically switching entity devices in a virtual-real combination scene of a network target range according to claim 1, wherein the network switching agent module monitors at a preset appointed port after configuring a new IP address; and after the scene switching service module sends the arp request packet, detecting whether the appointed port on the new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to a network target range platform after the connection.
3. The system for dynamically switching entity devices in a network target field virtual-real combined scene according to claim 1, wherein the configuration file of the DHCP server is configured with the correspondence relationship between the IP address allocated to the entity device in the switched new network target field scene and the mac address of the entity device.
4. The method for dynamically switching the entity equipment in the network target range virtual-real combined scene is characterized by comprising the following steps:
after the network target range platform receives an instruction of switching the entity equipment by a user, configuring a switch port and DHCP server information connected with the entity equipment according to network information of a new scene;
after the configuration is completed, the network target range platform transmits the old scene IP address, mac address and virtual network identification parameters of the entity equipment;
after receiving a call request of the network target range platform, a control server of the network target range platform constructs and sends an arp request packet by using the input interface parameters, wherein a source IP address in the arp request packet is a contracted IP address, a source mac address is a contracted or random mac address, a target mac address is a mac address of the entity equipment, and the target IP address is an IP address of the entity equipment in an old scene;
the entity equipment monitors an arp message on a network card of the entity equipment in real time, releases a local IP address when receiving that a source IP address is a contracted IP address and a target address is a local address, and acquires a new IP address from a DHCP server through a local DHCP client.
5. The method for dynamically switching entity devices in a network target range virtual-real combination scene according to claim 4, further comprising: after the entity equipment is configured with a new IP address, monitoring is carried out on a preset appointed port; after the control server of the network target station platform sends the arp request packet, detecting whether the appointed port on the new IP address of the entity equipment can be connected, and pushing a message of successful IP address switching to the network target station platform after the communication.
6. The method for dynamically switching entity devices in a network target range virtual-real combined scene according to claim 4, wherein the configuring the switch port and DHCP server information connected to the entity devices according to the network information of the new scene comprises: according to the network information of the new scene, configuring a switch port connected with the entity equipment as an access port, and configuring an allowed Vlan as a virtual network identifier; and writing the corresponding relation between the IP address allocated for the entity equipment in the new scene and the mac address of the entity equipment into the configuration file of the corresponding network DHCP server side.
7. A network target range system comprises a control server as a network target range control node and a physical device connected with the control server through a physical switch, wherein the control server is provided with a network target range platform; the control server comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is realized when being loaded to the processor: receiving an old scene IP address, a mac address and a virtual network identification parameter of entity equipment; after a scene switching request of a network target range platform is received, constructing and sending an arp request packet according to an incoming interface parameter, wherein a source IP address in the arp request packet is a contracted IP address, a source mac address is a contracted or random mac address, a target mac address is a mac address of entity equipment, and the target IP address is an IP address of the entity equipment in an old scene;
the entity device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being implemented when loaded into the processor: and monitoring an arp message on a network card of the entity equipment, releasing the local IP address when the source IP address is a contracted IP address and the target address is a local address, and acquiring a new IP address from a DHCP server through a local DHCP client.
8. The network range system of claim 7, wherein the computer program on the physical device when loaded into the processor further implements: after a new IP address is configured, monitoring is carried out on a preset appointed port; the computer program on the control server when loaded into the processor also implements: after the arp request packet is sent, whether the appointed port on the new IP address of the entity equipment can be communicated or not is detected, and after the communication, a message of successful IP address switching is pushed to the network target range platform.
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| CN115348126A (en) * | 2022-07-26 | 2022-11-15 | 北京永信至诚科技股份有限公司 | Network target range entity equipment access method, device and implementation system |
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