CN107438016B - Network management method, device, system and storage medium - Google Patents
Network management method, device, system and storage medium Download PDFInfo
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- CN107438016B CN107438016B CN201710632822.5A CN201710632822A CN107438016B CN 107438016 B CN107438016 B CN 107438016B CN 201710632822 A CN201710632822 A CN 201710632822A CN 107438016 B CN107438016 B CN 107438016B
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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Abstract
The invention relates to a network management method, equipment, a system and a storage medium, wherein the method comprises the steps of periodically sending a network discovery message to a local area network, so that after a first node of the local area network receives the network discovery message, the network discovery message is forwarded to other ports or adjacent local area networks, and the network discovery message reaches each node of the network; receiving a first response message of a first node to the network discovery message and a second response message of other ports forwarded by the first node or a plurality of nodes in a local area network to the network discovery message; each node in the network is monitored according to the first reply message and the second reply message. Therefore, the managed device in the network can be automatically scanned and discovered so as to monitor and manage the managed device.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a network management method, device, system, and storage medium.
Background
The traditional Network Management system based on simple Network Management protocol (snmp) adopts a unicast technology, which requires uniform planning of Network IP addresses of managed devices and configuration of each device to be managed, and meanwhile, a Network topology relationship needs manual intervention and establishment.
Therefore, the implementation of the conventional network management system has very high professional requirements on network constructors and system managers, which results in high implementation cost. For the later-stage network transformation and expansion, the network and the network management system need to be re-planned, which not only affects the efficiency, but also increases the management and maintenance cost.
Disclosure of Invention
The problem of high cost and low efficiency is solved, and a network management method, equipment, a system and a storage medium are provided.
A network management method, comprising:
periodically sending a network discovery message to the local area network, so that after receiving the network discovery message, a first node of the local area network forwards the network discovery message to other ports or adjacent local area networks, and the network discovery message reaches each node of the network;
receiving a first response message of a first node to the network discovery message and a second response message of a plurality of nodes to the network discovery message in other ports or a local area network forwarded by the first node;
each node in the network is monitored according to the first reply message and the second reply message.
In one embodiment, periodically sending a network discovery packet to a local area network includes:
and periodically broadcasting or multicasting the network discovery message to the local area network.
In one embodiment, the first response message and the second response message further include: each node in the network which receives the network discovery message generates topology information according to the topology discovery message periodically sent by the neighbor node.
In one embodiment, the method further comprises the following steps:
and generating a network topology structure according to the first response message and the second response message.
In one embodiment, monitoring each node in the network based on the first reply message and the second reply message comprises:
if the first response message or the second response message of one node is not received within the preset time threshold value;
one of the nodes is determined to be down.
A network management method, comprising:
receiving a network discovery message sent by a network management server;
returning the first response message according to the network discovery message, and forwarding the network discovery message to other ports or adjacent local area networks so that the network discovery message reaches each node of the network;
receiving second response messages of a plurality of nodes in other ports or adjacent local area networks to the network discovery messages;
and forwarding the second response message to the network management server.
In one embodiment, the method further comprises the following steps:
and periodically sending the topology discovery message to the neighbor node so that the neighbor node generates topology information according to the topology discovery message.
In one embodiment, the method further comprises the following steps: receiving topology discovery messages periodically sent by neighbor nodes; and generating topology information according to the topology discovery message.
In one embodiment, the first response message and the second response message further include topology information, so that the network management server generates a network topology structure according to the first response message and the second response message.
A network management device, comprising:
the sending module is used for periodically sending the network discovery message to the local area network so that the first node of the local area network forwards the network discovery message to other ports or the local area network after receiving the network discovery message, and the network discovery message reaches each node of the network;
the receiving module is used for receiving a first response message of the first node to the network discovery message and a second response message of other ports forwarded by the first node or a plurality of nodes in the local area network to the network discovery message;
and the monitoring module is used for managing and monitoring each node in the network according to the first response message and the second response message.
In one embodiment, the first response message and the second response message further include: each node in the network which receives the network discovery message generates topology information according to the topology discovery message periodically sent by the neighbor node;
the network management device further comprises: and the network topology generating module is used for generating a network topology structure according to the first response message and the second response message.
A network management system comprising a network management device and a managed device, the network management device having stored thereon a computer program which, when executed by the network management device, carries out the steps of the method as set out above.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method as described above.
According to the network management method, the device, the system and the storage medium, the network management server periodically sends the network discovery message to the local area network, and receives the response message returned by each node in the network according to the network discovery message, so that the managed device in the network can be automatically scanned and discovered, and the managed device can be monitored and managed.
Drawings
FIG. 1 is a flow diagram illustrating a method for network management in one embodiment;
FIG. 2 is a flow diagram illustrating a method for network management in one embodiment;
FIG. 3 is a flow diagram illustrating a method for network management in one embodiment;
FIG. 4 is a flow diagram illustrating a method for network management in one embodiment;
FIG. 5 is a flow diagram illustrating a method for network management in one embodiment;
FIG. 6 is a diagram illustrating an exemplary network management device;
fig. 7 is a schematic structural diagram of a network management device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
An embodiment of the present invention provides a network management method, as shown in fig. 1, including the following steps:
step S101, periodically sending network discovery messages to the local area network where the network discovery messages are located.
In this embodiment, when the network management server is connected to a network, the network management server may automatically complete scanning of a plurality of managed devices in the network. Specifically, after the network management server is connected to the network, the network management server periodically sends a network discovery message to the local area network, so that the first node of the local area network receives the network discovery message and then forwards the network discovery message to other ports or adjacent local area networks.
Step S102, receiving a first response message of the first node to the network discovery message, and a second response message of a plurality of nodes to the network discovery message in other ports or a local area network forwarded by the first node.
In this embodiment, after receiving the network discovery packet, the first node returns a first response message to the network management server, where the first response message includes state information of the first node, that is, a name and port state information of the first node. Meanwhile, the first node also forwards the network discovery message to other ports or adjacent local area networks, receives second response messages returned by a plurality of nodes in other ports or adjacent local area networks, and forwards the second response messages to the network management server, wherein the second response messages comprise state information of the nodes returning the second response messages, namely names of the nodes returning the second response messages, port state information and the like.
Step S103, each node in the network is monitored according to the first response message and the second response message.
In this embodiment, the first node returning the first response message and the other nodes returning the second response message both indicate that a connection is established with the network management server, and therefore, these nodes are managed devices of the network management server, and thus, management, upgrade, status query, and the like of the network management server can be received, and respective running states are reported in real time, so that the network management server monitors these nodes.
In this embodiment, the network management server periodically sends a network discovery message to the local area network where the network management server is located, and receives a response message returned by each node in the network according to the network discovery message, so that the managed device in the network is automatically scanned and discovered, and the managed device is monitored and managed.
In a specific application scenario, the network management server may be an Auto Scan (a-Scan) management server. The A-SCAN management server can periodically broadcast or multicast a network discovery message to the local area network, so that the IP address does not need to be configured for the managed equipment, and the managed equipment can be automatically scanned and discovered. The managed device may be a switch, a router, a workstation, or other work devices.
In one embodiment, the first response message and the second response message may further include: each node in the network which receives the network discovery message generates topology information according to the topology discovery message periodically sent by the neighbor node. Specifically, in this embodiment, each node in the network that receives the network discovery packet may send the topology discovery packet to the neighboring node in a multicast or broadcast manner, and at the same time, may also receive the topology discovery packet sent by the neighboring node. The topology discovery packet may carry related topology information, such as an MAC address and an IP address of the sender node, and a port number, uplink and downlink traffic, an MAC address and a port number of the receiver node, which are used to send the topology discovery packet. When a certain node receives the topology discovery message, corresponding topology information is extracted and stored, and the response message returned after the network discovery message is received carries the topology information.
In one embodiment, as shown in fig. 2, the network management method may further include the steps of:
step S201, a network topology structure is generated according to the first response message and the second response message.
In this embodiment, the network management server may discover the entire network topology according to the topology information carried in the first response message and the second response message, so as to generate the network topology structure.
In one embodiment, monitoring each node in the network based on the first reply message and the second reply message comprises: the network management server can monitor the managed equipment according to the first response message and the second response message to identify and alarm network abnormity.
Specifically, if the network management server does not receive the first response message or the second response message of one of the nodes within the preset time threshold when the network management server periodically sends the network discovery message after establishing the network topology structure, it may be determined that the node is down.
The network management server can also judge whether the network is congested or not by responding to the uplink and downlink flow information of the node port in the message by configuring the flow threshold in advance. Network congestion may be determined if the traffic of a port exceeds a traffic threshold.
In an embodiment, the network management server extracts topology information, such as a MAC address and port traffic of each managed device, from a response message returned by each managed device, and combines information of an Organization Unique Identifier (OUI) of a managed device manufacturer, so as to identify the type of the managed device. In this embodiment, the OUI information includes the first 3 bytes of the MAC address, and has a certain correspondence with information such as a manufacturer name and a manufacturer registration address, so that the type of the managed device can be identified through the information, so as to monitor and manage the managed device. For example, it can be recognized that the managed device is a security camera, a wireless Access Point (AP) device, a video interphone, or the like. Since the traffic characteristics and MAC address characteristics of these devices are not the same, for example: the security camera generally has an uplink flow larger than a downlink flow, has a uniform uplink rate, and generally has one MAC address or a plurality of MAC addresses of the same OUI corresponding to a port of the switch; if the AP device normally has a downlink traffic greater than an uplink traffic, traffic distribution is relatively unstable at different time points, and multiple MAC addresses of different OUIs may exist at a corresponding switch port; the visual interphone has uniform flow distribution during normal work and basically no flow during non-work, and one MAC address or a plurality of MAC addresses of the same OUI generally exist in a corresponding equipment port.
The network management Server defaults to a port for interconnecting the switch and the switch, a network camera (generally having the following characteristics that A. output flow is larger than input flow, B. flow characteristic is more than 1Mbps and less than 16Mbps, C. flow fluctuation time is within 1Mbps more than 90%, OUI corresponding to D.MAC address is the MAC address of a mainstream network camera manufacturer or is definitely configured as the network camera), the port where a DHCP Server is located (a network management Server sends DHCP Discovery message by regularly and actively broadcasting so as to know the MAC address of DHCP SERVER, then the port where DHCP SERVER is located can be found through the corresponding relation between the MAC address reported by the switch and the port), and other ports configured manually, the network management Server identifies the ports as a key link, if the critical link has no traffic or link ports once, the critical link is considered to be abnormal in operation.
The network management server can discover whether a plurality of DHCP SERVER exist by actively sending a DHCP discover message, and can discover ARP spoofing by automatically PING a gateway address. Specifically, the network management server sends a DHCP discover message in a broadcast form, and DHCP SERVER on the network needs to respond as long as receiving the message, so the network management server can identify whether a plurality of DHCP SERVER exist according to the difference of the IP addresses or MAC addresses of the responses.
When the exchanger is at the PING gateway address, it will send ARP REQUEST message, the message is also sent out in broadcast mode, if there is ARP deception software or tool on the network, the received message will automatically respond, the network management server can compare the MAC address of the responding message with the MAC address of the real gateway, thus it can identify the equipment for ARP deception. The network management server can also perform network self-healing by automatically disabling the switch ports, thereby reducing the risk of ARP spoofing.
The PING can also find whether the equipment such as AP, a network camera, a visual interphone and the like of a lower node of the switch works currently, the running state of the same type of equipment can be compared through the PING delay time, and whether the equipment is in a normal working state or not can be identified through the historical data comparison of flow. For example, in the network discovery process, the network management server can learn the switch ports, MAC addresses and IP address information of all managed devices in the network through the information reported by the managed devices. Therefore, the network management server can perform PING operation to the managed devices at regular time according to the information, and if the IP address PING of the managed device is not passed or the response time of the managed device is significantly prolonged (for example, exceeds 0.5S) compared with the historical PING record of the managed device, the network management server can determine that the operation state of the managed device may have a fault. For the managed devices with long-term online, such as the AP, the webcam, and the video interphone, if there is no traffic for a period of time or the traffic is lower than or higher than the configured traffic threshold, it may be determined that the devices are abnormal. When the device is found to be abnormal, the network management server can also carry out self-healing through the power supply of the switch port, thereby realizing the monitoring management of the managed device, not only reducing the difficulty of network maintenance, but also saving the maintenance cost of the network and the efficiency of solving problems in a certain procedure.
An embodiment of the present invention further provides a network management method, which is mainly applied to a switch device, and as shown in fig. 3, the method may include the following steps:
step S301, receiving a network discovery message sent by a network management server.
In this embodiment, the network management server periodically sends the network discovery packet to the local area network where the network management server is located, and the switch located in the same local area network as the network management server may receive the network discovery packet.
Step S302, the first response message is returned according to the network discovery message, and the network discovery message is forwarded to other ports or adjacent local area networks.
When the switch in the same local area network with the network management server receives the network discovery message, a first response message is returned to the network management server, wherein the first response message comprises the state information of the switch, namely the name and port state information of the switch. Meanwhile, the switch may also forward the Network discovery packet to other ports or an adjacent Local Area Network, and specifically, the Network discovery packet may be transmitted to other ports or an adjacent Local Area Network in a proxy or copy manner, without being limited to the two-layer ethernet protocol and the IP layer ethernet protocol, so as to implement transmission across Virtual Local Area networks (VLAN for short). Thereby allowing the network discovery packet to reach every node of the network. The node may be a switch, a router, a workstation, or other work devices.
Step S303, receiving a second response message to the network discovery packet from the multiple nodes in the other ports or the adjacent local area network, and forwarding the second response message to the network management server.
In this embodiment, the switch in the same local area network as the network management server may further receive a second response message to the network discovery packet from a plurality of nodes in other ports or an adjacent local area network, and forward the second response message to the network management server. The second response message includes the status information of the node returning the second response message, that is, the name and port status information of the node returning the second response message. So that the network management server can monitor each node in the network according to the first reply message and the second reply message.
In one embodiment, as shown in fig. 4, the network management method may further include the steps of:
step S401, periodically sending topology discovery messages to neighbor nodes.
In this embodiment, each node in the network that receives the network discovery packet may periodically send the topology discovery packet to the neighboring node in a multicast or broadcast manner, where the topology discovery packet may carry related topology information, such as an MAC address and an IP address of a sender node, and a port number, an uplink traffic, a downlink traffic, an MAC address and a port number of a receiver node, which are used for sending the topology discovery packet. So that neighboring nodes can learn network topology relationships.
In one embodiment, as shown in fig. 5, the network management method may further include the steps of:
step S501, receiving topology discovery messages periodically sent by neighbor nodes.
In this embodiment, each node in the network that receives the network discovery packet may also receive a topology discovery packet sent by a neighboring node, so as to learn a network topology relationship.
Step S502, generating topology information according to the topology discovery message.
When a certain node receives the topology discovery message, extracting corresponding topology information for storage, wherein the topology information comprises the MAC address and the IP address of the sender node, and the port number, the uplink flow and the downlink flow, the MAC address and the port number of the receiver node and the like used for sending the topology discovery message.
In one embodiment, the topology information may also be included in the first reply message and the second reply message. Specifically, each node in the network that receives the network discovery packet may carry the topology information in the returned response message, so that the network management server may generate the network topology structure according to the topology information in the response message.
An embodiment of the present invention further provides a network management device, as shown in fig. 6, including a sending module 601, a receiving module 602, and a monitoring module 603, where,
a sending module 601, configured to periodically send a network discovery packet to a local area network, so that after receiving the network discovery packet, a first node of the local area network forwards the network discovery packet to other ports or the local area network, so that the network discovery packet reaches each node of the network;
a receiving module 602, configured to receive a first response message from a first node to a network discovery packet, and a second response message from other ports forwarded by the first node or from multiple nodes in a local area network to the network discovery packet;
a monitoring module 603, configured to manage and monitor each node in the network according to the first response message and the second response message.
In one embodiment, as shown in fig. 7, the first response message and the second response message further include: each node in the network which receives the network discovery message generates topology information according to the topology discovery message periodically sent by the neighbor node. The network management device may further include a network topology generating module 701 configured to generate a network topology structure according to the first response message and the second response message.
The embodiment of the invention also provides a network management system, which comprises network management equipment and managed equipment, wherein the network management equipment stores a computer program, and the computer program realizes the following steps when being executed by the network management equipment: periodically sending a network discovery message to the local area network, so that after receiving the network discovery message, a first node of the local area network forwards the network discovery message to other ports or adjacent local area networks, and the network discovery message reaches each node of the network; receiving a first response message of a first node to the network discovery message and a second response message of a plurality of nodes to the network discovery message in other ports or a local area network forwarded by the first node; each node in the network is monitored according to the first reply message and the second reply message.
In one embodiment, the first response message and the second response message further include: each node in the network which receives the network discovery message generates topology information according to the topology discovery message periodically sent by the neighbor node.
In one embodiment, further comprising: and generating a network topology structure according to the first response message and the second response message.
In one embodiment, monitoring each node in the network based on the first reply message and the second reply message comprises: if the first response message or the second response message of one node is not received within the preset time threshold value; one of the nodes is determined to be down.
In one embodiment, periodically sending a network discovery message to a local area network includes: and periodically sending a network discovery message to the local area network in a broadcasting or multicast mode.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps: receiving a network discovery message sent by a network management server; returning the first response message according to the network discovery message, and forwarding the network discovery message to other ports or adjacent local area networks so that the network discovery message reaches each node of the network; receiving second response messages of a plurality of nodes in other ports or adjacent local area networks to the network discovery messages; and forwarding the second response message to the network management server.
In one embodiment, further comprising: and periodically sending the topology discovery message to the neighbor node so that the neighbor node generates topology information according to the topology discovery message.
In one embodiment, further comprising: receiving topology discovery messages periodically sent by neighbor nodes; and generating topology information according to the topology discovery message.
In one embodiment, the first response message and the second response message further include topology information, so that the network management server generates a network topology structure according to the first response message and the second response message.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A network management method, applied to a network management server, the method comprising:
the network management server is connected to a network and periodically sends a network discovery message to the local area network, so that after a first node of the local area network receives the network discovery message, the network discovery message is forwarded to other ports or adjacent local area networks in a proxy or copy mode, and the network discovery message reaches each node of the network;
receiving a first response message of the first node to the network discovery message and second response messages of other ports or a plurality of nodes in a local area network forwarded by the first node to the network discovery message, wherein the first response message comprises state information of the first node, the second response message comprises state information of a node returning the second response message, the state information comprises port state information of the node, and the first node returning the first response message and the plurality of other nodes returning the second response message both represent connection establishment with the network management server;
monitoring each node in the network according to the first response message and the second response message, identifying network abnormality, and performing corresponding control when the network abnormality is identified;
the first response message and the second response message further include: each node in the network that receives the network discovery packet generates topology information according to topology discovery packets periodically sent by neighboring nodes, and then the method further includes: and generating a network topological structure according to the first response message and the second response message.
2. The method according to claim 1, wherein the periodically sending the network discovery packet to the local area network includes:
and broadcasting or multicasting the network discovery message to the local area network periodically.
3. The method according to claim 1, wherein the monitoring each node in the network according to the first reply message and the second reply message comprises:
if the first response message or the second response message of one node is not received within the preset time threshold value;
determining that the one of the nodes is down.
4. The method according to claim 1, wherein the monitoring each node in the network according to the first reply message and the second reply message comprises:
and judging whether the network is congested according to the uplink and downlink flow information of the corresponding node port in the first response message and the second response message, and if the flow of the port exceeds a preset flow threshold, determining the network congestion.
5. The method according to claim 1, wherein the monitoring each node in the network according to the first reply message and the second reply message comprises:
and identifying the type of the corresponding node according to the topology information in the first response message and the second response message.
6. A network management method applied to a switch device, the method comprising:
receiving a network discovery message sent by a network management server after the network management server is connected to a network;
returning a first response message according to the network discovery message, and forwarding the network discovery message to other ports or adjacent local area networks in a proxy or copy mode so that the network discovery message reaches each node of the network, wherein the first response message comprises state information of the switch equipment, and the state information comprises port state information of the switch equipment;
receiving second response messages of a plurality of nodes in other ports or adjacent local area networks to the network discovery message, wherein the second response messages comprise state information of nodes returning the second response messages, the state information comprises port state information of the nodes, and the switch equipment returning the first response messages and the other plurality of nodes returning the second response messages both represent connection establishment with the network management server;
forwarding the second response message to the network management server, so that the network management server monitors each node in the network according to the first response message and the second response message to identify network abnormality, and performs corresponding management and control when the network abnormality is identified;
the first response message and the second response message further include: and each node in the network, which receives the network discovery message, generates topology information according to the topology discovery message periodically sent by the neighbor node, and the first response message and the second response message are also used for indicating the network management server to generate a network topology structure according to the first response message and the second response message.
7. The network management method according to claim 6, further comprising:
and periodically sending a topology discovery message to a neighbor node so that the neighbor node generates topology information according to the topology discovery message.
8. A network management device, comprising:
the sending module is used for periodically sending a network discovery message to the local area network so that after the first node of the local area network receives the network discovery message, the first node forwards the network discovery message to other ports or the local area network in an agent or copy mode, and the network discovery message reaches each node of the network;
a receiving module, configured to receive a first response message to the network discovery packet from the first node, and a second response message to the network discovery packet from other ports forwarded by the first node or multiple nodes in a local area network, where the first response message includes state information of the first node, the second response message includes state information of a node returning to the second response message, the state information includes port state information of the node, and the first node returning to the first response message and the multiple other nodes returning to the second response message both indicate that a connection is established with the network management server;
the monitoring module is used for managing and monitoring each node in the network according to the first response message and the second response message so as to identify network abnormality and correspondingly manage and control when the network abnormality is identified;
the first response message and the second response message further include: and each node in the network, which receives the network discovery message, generates topology information according to topology discovery messages periodically sent by neighbor nodes, and the network management equipment further comprises a network topology generation module, which is used for generating a network topology structure according to the first response message and the second response message.
9. An apparatus for a network management system, comprising: a processor; a memory for storing the processor-executable instructions; wherein the processor is configured to execute the instructions to carry out the steps of the method according to any one of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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| CN110719178A (en) * | 2018-07-11 | 2020-01-21 | 富士通株式会社 | Network topology acquisition method and device |
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