JP5630611B2 - Network monitoring system and method for registering monitored device - Google Patents

Description

  The present invention relates to a network monitoring system, and more particularly to a method for registering (detecting) information related to a monitoring target device.

The network monitoring system includes a monitoring system and a plurality of monitoring target devices connected to the monitoring system via a monitoring network. In such a network monitoring system, in order to monitor a plurality of monitoring target devices, the monitoring system needs to register information regarding the plurality of monitoring target devices. Here, the “information regarding the monitoring target device” means information for specifying the monitoring target device such as an IP address, a device name, and a device type of the monitoring target device.

  Conventionally, when information related to a monitoring target device is registered, information related to the monitoring target device is manually registered in the monitoring system.

  On the other hand, in this type of network monitoring system, OSPF (Open Shortest Path First) is often applied as a routing protocol in order to perform flexible path control. Various prior art documents using OSPF as a route control protocol are known.

  For example, Patent Document 1 discloses a “network monitoring system” that can centrally manage the entire configuration of a network in a network using OSPF as a route control protocol, and that can easily and accurately identify a route failure. providing. The network monitoring system disclosed in Patent Document 1 is a network path change monitoring system that connects a plurality of areas with a backbone area and adopts OSPF as a path control protocol. This path change monitoring system includes an OSPF router, an agent, and a manager. The OSPF router is provided in each area and exchanges route information in response to network updates. An agent is provided for each area, acquires route information, and creates a topology database in the link. The manager is provided in the backbone area, collects topology databases from each agent, and combines them to create a topology database for the entire network.

  Patent Document 2 proposes a “network system” capable of monitoring an OSPF packet, detecting an abnormality, and presenting an improvement plan in a network system in which the OSPF protocol operates. The network system disclosed in Patent Document 2 is a network system that includes at least one network monitoring device and a comprehensive monitoring system that monitors the network monitoring device in an integrated manner and that operates the OSPF unicast routing protocol. Each of the network monitoring devices periodically monitors the LSA information distributed by the area information router and AS boundary router as distribution subnet information, and acquires the LSA information distributed by the area information router and AS boundary router as ABR / ASBR information. , The distribution subnet information and the ABR / ASBR information are notified to the integrated monitoring apparatus. The integrated monitoring device manages distribution subnet information and ABR / ASBR information for each area, identifies and displays area border routers and AS border routers on a map, and displays distribution subnet information according to user operations. Furthermore, the integrated monitoring device analyzes and displays the subnets that can be aggregated in the network.

JP 2002-354012 A JP 2010-109729 A

  In such a network monitoring system, since information related to a plurality of types of monitoring target devices is registered and managed in the monitoring system, there are many setting items such as the name of the corresponding monitoring target device, its IP (internet protocol) address, and device type. . As a result, there is a problem that the monitoring target device cannot be correctly monitored due to a decrease in work efficiency due to registration of a large number of monitoring target devices or a monitoring abnormality due to a setting error.

  Some conventional network monitoring systems use a method such as LLDP (Link Layer Discovery Protocol) to detect devices (monitored devices) arranged on a monitoring network. However, LLDP is a layer 2 protocol, and information cannot be extracted centrally across sub-networks. Therefore, in order to grasp the information of the entire network, it is necessary to gradually acquire information about the device from the network adjacent to the monitoring system.

  In addition, there is a method that provides a semi-automatic method in which a registration message is transmitted to a range of IP addresses designated by an operator or the like from a monitoring system, and information related to a monitored device that has responded is registered. However, since the registration message is sent regardless of the presence or absence of the monitoring target device, there is a problem that it is not efficient.

  An object of the present invention is to provide a method for automatically detecting a monitoring target device (registering information related to the monitoring target device) without performing any special setting in the monitoring target device.

  Note that the network (monitoring) systems disclosed in Patent Documents 1 and 2 are merely passively monitoring OSPF packets and judging the network state. In other words, neither of the above Patent Documents 1 and 2 relates to a technical idea of automatically detecting a monitoring target device on a network.

The monitoring target device registration method according to the present invention is a network monitoring system having a plurality of monitoring target devices arranged on a monitoring network, and a monitoring system that centrally manages the plurality of monitoring target devices. A method for registering information on a plurality of monitoring target devices in the monitoring system, wherein the monitoring system adds an original message including information on the monitoring system in an OSPF routine protocol applied in the monitoring network. And distributing to the entire monitoring network, and sending a registration request message including information on the monitoring target device to the monitoring system when the monitoring target device receives the unique message.

  According to the present invention, it is possible to avoid limitations due to sub-networks, avoid inefficient packet transmission to non-existing devices, and reduce the chances of misconfiguration.

1 is a block diagram showing a network monitoring system according to a first embodiment of the present invention. It is a block diagram which shows the internal structure of the monitoring system and monitoring target apparatus which are used for the network monitoring network system shown in FIG. It is a figure which shows the structure of Opaque LSA delivered by the OSPF protocol. It is a figure which shows the example set in Opaque Information of Opaque LSA shown in FIG. FIG. 2 is a block diagram illustrating a router in the monitoring network in the network monitoring system illustrated in FIG. 1. It is a flowchart which shows the operation | movement procedure of the monitoring object apparatus of the network monitoring system shown in FIG. FIG. 3 is a block diagram illustrating an example of a registration request message issued from the monitoring target device to the monitoring system in the network monitoring system illustrated in FIG. 1. It is a flowchart which shows the operation | movement procedure of the monitoring system of the network monitoring system shown in FIG. It is a block diagram which shows the network monitoring system which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the 1st network monitoring system relevant to this invention. 11 is a flowchart illustrating a method for registering information related to a monitoring target device in the network monitoring system illustrated in FIG. It is a block diagram which shows the 2nd network monitoring system relevant to this invention. It is a block diagram which shows the 3rd network monitoring system relevant to this invention. It is a flowchart which shows the registration method of the information regarding the monitoring object apparatus in the network monitoring system shown in FIG.

  In order to facilitate understanding of the present invention, first, a network monitoring system related to the present invention will be described.

  With reference to FIG. 10 and FIG. 11, the registration method of the information regarding the monitoring object apparatus in the 1st network monitoring system relevant to this invention is demonstrated. FIG. 10 is a block diagram showing a first network monitoring system related to the present invention, and FIG. 11 is a flowchart showing a method for registering information related to a monitoring target device in the first network monitoring system related to the present invention.

  As shown in FIG. 10, the first network monitoring system related to the present invention includes a monitoring system 101 and a monitoring target device 103, which are connected via the monitoring network 102.

  Next, a method for registering information related to the monitoring target device in the related first network monitoring system shown in FIG. 10 will be described with reference to FIG.

  In the related first network monitoring system, after setting the monitoring target device (step S301), the monitoring target device 103 sets an IP (interne protocol) address, sets a device name, and sets a routing protocol ( Step S302). In order to monitor the corresponding device 103 from the monitoring system 101 after ensuring reachability with the monitoring system 101, the monitoring system 101 sets the device type, the IP address of the corresponding device, and the device name of the corresponding device. Settings are made (step S304), and the corresponding device 103 is registered (step S303).

  In this case, it is necessary to set the same setting in the monitoring system 101 and the monitoring target device 103 without contradiction. If a setting error occurs, the monitoring target device 103 cannot be monitored correctly. Therefore, it is necessary to review the setting in the monitoring target device 103 (step S302) or the setting in the monitoring system 101 (step S304) and reconnect. There is.

  In order to solve these problems, a second network monitoring system related to the present invention as shown in FIG. 12 is known.

  The illustrated second network monitoring system related to the present invention includes a monitoring system 101, a network device 402 connected to the monitoring system 101 via a first network 401 a, and a second network connected to the network device 402. A first monitoring target device 103a connected via 401b, and second and third monitoring target devices 103b and 103c connected to the first monitoring target device 103a via a third network 401c, A fourth monitoring target device 103d connected to the first monitoring target device 103a via the fourth network 401d and a fifth monitoring target device 103d connected to the fourth monitoring target device 103d via the fifth network 401e. And sixth monitoring target devices 103e and 103f.

  The second network monitoring system related to the present invention uses a protocol that performs layer 2 neighboring device detection such as LLDP (Link Layer Discovery Protocol) in the monitoring system 101 and the monitoring target devices 103a to 103f. Automatic detection of the devices 103a to 103f is performed.

  In this case, a protocol such as LLDP is a layer 2 protocol and does not communicate across sub-networks. For this reason, the monitoring system 101 first extracts information from the first network 401a adjacent to the monitoring system 101, and based on that information, further monitors the network device 402 existing in the adjacent first network 401a. It is necessary to extract information of the adjacent second network 401b. In some cases, it is necessary to exclude devices of different models (network devices) 402 that cannot be monitored by the corresponding monitoring system 101, for example. As a result, there is a problem that processing becomes complicated.

  With reference to FIG. 13 and FIG. 14, a third network monitoring system related to the present invention and a method for registering information related to the monitoring target device will be described. FIG. 13 is a block diagram showing a third network monitoring system related to the present invention, and FIG. 14 is a flowchart showing a method for registering information related to a monitoring target apparatus of the third network monitoring system related to the present invention.

  As shown in FIG. 13, the third network monitoring system related to the present invention includes a monitoring system 101 and first to sixth monitoring target devices 103 a to 103 f, which are connected via the monitoring network 102. It is connected. The first to sixth monitoring target devices 103 a to 103 f are connected to each other via the monitoring line 104.

  Next, with reference to FIG. 14, a description will be given of a method for registering information related to a monitoring target device in the related third network monitoring system shown in FIG. This registration method is a method in which a registration message is transmitted to a range of IP addresses designated by the monitoring system 101, and information relating to the monitored device that has responded is registered.

  First, the monitoring system 101 transmits a registration message to the designated range of IPs (step S501). Then, the monitoring system 101 determines whether or not there is a response from the monitoring target device (step S502). When there is a response (“Yes” in step S502), the monitoring system 101 registers information regarding the monitoring target device that has responded (step S503). After the registration or when there is no response in Step S502 (“None” in Step 502), the monitoring system 101 determines whether or not the confirmation of all the specified ranges is completed (Step S504). If the confirmation is not completed (“No” in step S504), the process returns to step S501. If the confirmation is complete (“Yes” in step S504), the process ends.

  In this registration method, as the number of devices to be monitored increases, the range of IP addresses for sending registration messages in step S501 becomes wider. In addition, since the registration message is transmitted regardless of whether the monitoring target apparatus exists, the transmission of useless messages increases as a result, and the traffic of the monitoring network 102 increases. Further, as shown in step S502, the monitoring system 101 has only to determine that there is no response message by a timeout, which causes an increase in apparatus registration processing time.

  Therefore, in the present invention, a unique message is inserted and processed in a routing protocol normally applied in operating a monitoring network, and an unnecessary packet is not sent out, and a monitored device is automatically set with a minimum setting. Provided is a method for detecting (registering information related to a monitoring target device).

  Next, features of the present invention will be described.

  The present invention provides a network monitoring system that includes a plurality of monitoring target devices arranged on a monitoring network and a monitoring system that centrally manages them, and automatically monitors the monitoring target devices installed on the monitoring network. It is characterized in that the monitoring target device can be automatically controlled in the monitoring system.

  Next, the configuration of the embodiment of the present invention will be described with reference to the drawings.

  A network monitoring system according to a first embodiment of the present invention will be described with reference to FIG. The illustrated network monitoring system includes a monitoring system 101 and first to sixth monitoring target devices 103 a to 103 f, which are connected via the monitoring network 102. The first to sixth monitoring target devices 103 a to 103 f are connected to each other via the monitoring line 104.

  In FIG. 1, monitoring target devices 103 a to 103 f and a monitoring system 101 are devices equipped with an automatic detection method for a monitoring device (monitoring target device) according to the first embodiment of the present invention.

  Such a monitoring system 101 and a network monitoring system composed of the monitoring target devices 103a to 103f manage many monitoring target devices, and even when a failure occurs on the monitoring network 102, the monitoring system 101 monitors them. Continue control. For this reason, a complicated network such as a redundant monitoring line 104 or a mesh configuration is often configured. In order to perform flexible path control in such a network, OSPF (Open Shortest Path First) is often applied as a routing protocol. Here, OSPF is one of path control protocols for determining an optimum route for transmitting a packet, and determines an optimum route in consideration of a total route charge.

  FIG. 2 is a block diagram showing details of the internal configuration of the monitoring system 101 and the monitoring target device 103 shown in FIG.

  The monitoring system 101 is connected to a monitoring network 102 configured by IP through one or more interfaces.

  In addition, the monitoring system 101 includes an OSPF protocol processing unit 105, a monitoring system information insertion unit 106, and a registration message reception processing unit 109 therein.

  The OSPF protocol processing unit 105 sends out an OSPF protocol packet to the monitoring network 102. Further, the OSPF protocol processing unit 105 receives an OSPF protocol packet transmitted from another monitoring target device or a router, and performs path control of the monitoring network 102.

  The monitoring system information insertion unit 106 inserts information of the monitoring system 101 into the OSPF protocol packet transmitted by the monitoring system 101 itself. The registration message reception processing unit 109 receives a registration request message from the monitoring target device 103 as described later.

  On the other hand, similarly to the monitoring system 101, the monitoring target device 103 is connected to the monitoring network 102 configured by IP through one or more interfaces.

  The monitoring target device 103 includes an OSPF protocol processing unit 107 for path control, a monitoring system information extraction unit 108, and a registration message transmission processing unit 110.

  The monitoring system information extraction unit 108 extracts the information of the monitoring system 101 included in the OSPF protocol packet. The registration message transmission processing unit 110 determines whether registration to the monitoring system 101 is necessary based on the extracted information, and sends a registration request message for information related to the monitoring target device 103 to the monitoring system 101.

  Here, on the IP network (monitoring network) 102 that connects the monitoring system 101 and the monitoring target device 103, network devices that are not monitored by the monitoring system 101, such as layer 2 switches and routers, are also arranged. The reachability of the entire network including is realized by route control by OSPF.

  The monitoring system information insertion unit 106 of the monitoring system 101 stores the information of the monitoring system 101 itself in an OSPF protocol packet and distributes it on the monitoring network 102 as a unique message. On the other hand, the monitoring system information extraction unit 108 of the monitoring target device 103 automatically detects (extracts) the monitoring system 101 based on the information of the monitoring system 101 stored in the OSPF protocol packet. The registration message transmission processing unit 110 sends a registration request message including the device type of the monitoring target device 103 and the device name set for monitoring to the detected (extracted) monitoring system 101.

  As described above, in the first embodiment of the present invention, the unique message including the information of the monitoring system 101 in the OSPF protocol packet that is regularly processed in the monitoring network 102 is distributed on the monitoring network 102. Therefore, the monitoring target device 103, which has extracted the information of the monitoring system 101 from the received OSPF protocol packet, sends a registration request message for requesting registration of information related to the monitoring target device 103 to the monitoring system 101, thereby monitoring. The system 101 can automatically detect the monitoring target device 103 (register information related to the monitoring target device 103).

  Next, the operation of the network monitoring system shown in FIG. 2 will be described.

  Since the monitoring system 101 performs route control of the monitoring network 102, the OSPF protocol processing unit 105 transmits an OSPF protocol packet to the monitoring network 102 and receives an OSPF protocol packet from the monitoring network 102.

  At this time, in the OSPF protocol, a data definition for distributing application-specific data called Opaque LSA shown in FIG. 3 is prepared.

  The monitoring system 101 according to the first embodiment of the present invention uses this Opaque LSA data definition, sets “11” defined as information distributed to the entire OSPF network in the Link State Type of the Opaque LSA, Set an arbitrary value in the range of “128” to “255” for the Opaque Type, and set “0” for the Opaque ID. Here, since the value of “128” to “255” is defined as a unique specification for the Opaque Type, a value common to the monitoring system 101 and the monitoring target device 103 may be used. In this embodiment, the value is not specified.

  The data excluding other Opaque Information is set to a value defined as the standard operation of OSPF and will not be described here.

  In the registration method according to the first embodiment of the present invention, as shown in FIG. 4, in the Opaque Information, the TLV format defined by the generally used 32-bit unit length is used, and the IP address of the monitoring system 101 is used. And the type of the monitoring system 101 are set. At this time, as shown in FIG. 4, the data length of the address of the monitoring system 101 is only changed regardless of whether it is IPv4 or IPv6. Also, as the OSPF, the technique according to the first embodiment of the present invention can be applied by using OSPFv2 for IPv4 and OSPFv3 for IPv6.

  The Opaque LSA shown in FIG. 4 distributed from the monitoring system 101 is received by the router 801 that performs path control by OSPF as in the monitoring system 101 and the monitoring target device 103, as shown in FIG. As described above, since the Opaque Type is set to a value defined for the purpose of the original specification, the router 801 itself does not extract the corresponding Opaque LSA information or perform specific processing, and does not perform monitoring that is connected to the router 801 Transfer is performed on the network 102 (denoted as Opaque LSA 802b in the figure).

  In this way, the information of the monitoring system 101 is distributed throughout the monitoring network 102 via the OSPF protocol packet.

  Assume that the first monitoring target device 103a is newly installed in this state. When a new monitoring target device is installed, an IP address is set for the corresponding first monitoring target device 103a, a management device name is set, and routing control is enabled by OSPF.

  When OSPF is enabled in the newly installed first monitoring target device 103a, the Opaque LSA 802b monitoring system information distributed from the monitoring system 101 is received in the first monitoring target device 103a.

  Whether the first monitoring target device 103a needs to extract the received monitoring system information according to the procedure shown in FIG. 6 and register information related to itself in the corresponding monitoring system 101 in the registration message transmission processing unit 110. If it is already registered, no processing is performed.

  More specifically, the OSPF protocol processing unit 107 of the first monitoring target device 103a receives the OSPF packet (step S901). The monitoring system information extraction unit 108 of the first monitoring target device 103a determines whether or not the received OSPF packet includes an Opaque LSA (step S902). If the Opaque LSA is included (“Yes” in Step S902), the monitoring system information extraction unit 108 of the first monitoring target device 103a acquires the type and IP address of the monitoring system 101 from the Opaque LSA (Step S902). S903).

  Next, the registration message transmission processing unit 110 of the first monitoring target apparatus 103a determines whether or not the acquired type and IP address of the monitoring system 101 have been registered (step S904). If the registration request has not been made (“No” in step S904), the registration message transmission processing unit 110 of the first monitoring target device 103a notifies the monitoring system 101 of a registration request message (step S905).

  Then, the registration message transmission processing unit 110 of the first monitoring target device 103a determines whether or not a registration request reception completion notification has been received from the monitoring system 101 (step S906). If the registration request reception completion notification is received (“Yes” in step S906), the process ends. If the registration request reception completion notification is not received (“No” in step S906), the process returns to step S905.

  If the registration message transmission processing unit 110 determines that it is necessary to make a registration request, as shown in FIG. 7, the registration message transmission processing unit 110 of the first monitoring target device 103a is included in the monitoring system information. A registration request message 1101 including an IP address, a device name, and a device type of the corresponding monitoring target device 103a is issued to the monitoring system 101 by using an appropriate communication unit according to the type of the monitoring system 101. At this time, the registration request message 1101 issued by the first monitoring target device 103a is performed using an appropriate message according to the type of monitoring system included in the Opaque LSA 802b. Therefore, in the first embodiment of the present invention, specific message types and formats are not defined.

  As shown in FIG. 8, the registration message reception processing unit 109 of the monitoring system 101 receives a registration request message from the first monitoring target device 103a (step S1001), and determines whether or not it has already been registered (step S1002). ). If not registered (“No” in step S1002), the registration message reception processing unit 109 of the monitoring system 101 performs a registration process (step S1003). Thereafter, the OSPF protocol processing unit 105 of the monitoring system 101 notifies the corresponding first monitoring target device 103a that the registration request message has been received (step 1004), and the registration request from the first monitoring target device 103a. Suppress sending messages.

  The registration message transmission processing unit 110 of the first monitoring target device 103a determines that a registration request has been made for the information of the monitoring system 101 in the process of step S904 in FIG. Control is performed so that a registration request is not performed when the monitoring system information included in the OSPF packet is extracted.

  In this way, the monitoring target device 103 makes a registration request to the monitoring system 101 including information related to the registration request message. As a result, the manual work is only the work at the time of installation of the monitoring target device, and it is possible to reduce the chance of erroneous setting.

  As described above, the first embodiment of the present invention has the following effects.

  The first effect is that the unique message is defined in the OSPF protocol packet and the distribution control to the entire network is performed by the OSPF protocol, so that the information of the monitoring system can be distributed without restriction of the subnetwork.

  The second effect is that since a unique message is defined in the routing protocol packet, a normal router that does not have the function proposed in the first embodiment does not interpret the content and issue a registration request notification. Also, no extra packet is sent to a non-existing device. For this reason, it is possible to extract only the devices to be monitored in the monitoring system (register information related to the monitoring target devices).

  The third effect is that a connection error due to an incorrect setting can be avoided as much as possible because a registration request to the monitoring system is made based on information registered in the monitoring target device.

  A network monitoring system according to the second embodiment of the present invention will be described with reference to FIG. As the second embodiment of the present invention, the basic configuration is as described above, but the correspondence of the area called OSPF stub area 1202 is further devised.

  In OSPF, the route information increases as the network configuration becomes large. Therefore, the route information can be reduced by dividing the entire network into a plurality of areas. At this time, if there is only one exit from the area on the OSPF, it is defined as a special area called a stub area 1202, and the route to the outside of the area is distributed without distributing all the route information to the corresponding area 1202. Will only be delivered as a default route.

  In this case, the Opaque LSA 1203 including the monitoring system information in which the Link State Type of the Opaque LSA is defined as “11” is not distributed to the monitoring target devices 103 a to 130 c inside the stub area 1202.

  Therefore, in the second embodiment, the monitoring target device 1201 arranged at the boundary of the stub area 1202 has the redistribution processing unit 1205 of the monitoring system information. The redistribution processing unit 1205 extracts the monitoring system information from the Opaque LSA 1203 received from outside the stub area 1202 and redistributes it as an Opaque LSA Link State Type 10 that is distributed only within the stub area 1202 to the inside of the area. have.

  As a result, the monitoring system information reaches the monitoring target devices 103 a to 130 c existing in the stub area 1202, and a registration request message is sent to the monitoring system 101 as in the operation of the first embodiment described above. It becomes possible to do.

  The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

DESCRIPTION OF SYMBOLS 101 ... Monitoring system 102 ... Monitoring network 103a-103f ... Monitoring object apparatus 104 ... Monitoring line 105 ... OSPF protocol processing part 106 ... Monitoring system information insertion part 107 ... OSPF protocol Processing unit 108 ... Monitoring system information extraction unit 109 ... Registration message reception processing unit 110 ... Registration message transmission processing unit 801 ... Router 1101 ... Registration request message 1201 ... Monitoring target device 1202 .. Stub area 1205 ... Redistribution processing unit

Claims (8)

In a network monitoring system having a plurality of monitoring target devices arranged on a monitoring network and a monitoring system for centrally managing the plurality of monitoring target devices, information related to the plurality of monitoring target devices is stored in the monitoring system. To register with
A step wherein the monitoring system, wherein by applying a proprietary message containing information of the monitoring system in OSPF routine protocol applied in the monitoring network, distributes throughout the monitoring network,
The monitoring target device that has received the unique message sends a registration request message including information about the monitoring target device to the monitoring system;
A method for registering a monitoring target device, including: It said monitoring system further comprises receiving the registration request message, a method of registering a monitored device according to claim 1. The method of registering a monitoring target device according to claim 2 , further comprising a step of notifying the corresponding monitoring target device of completion of reception of the registration request message after the monitoring system receives the registration request message. In a network monitoring system having a plurality of monitoring target devices arranged on a monitoring network, and a monitoring system for centrally managing the plurality of monitoring target devices,
The monitoring system includes:
A monitoring-side OSPF protocol processing unit that sends OSPF protocol packets to the monitoring network and receives OSPF protocol packets sent from the plurality of monitoring target devices;
A monitoring system information insertion unit that stores information on the monitoring system in the OSPF protocol packet and distributes the information on the monitoring network;
Each of the plurality of devices to be monitored is
A device-side OSPF protocol processing unit for sending an OSPF protocol packet to the monitoring network and receiving an OSPF protocol packet sent from the monitoring system;
A monitoring system information extraction unit that extracts the monitoring system according to the information of the monitoring system stored in the OSPF protocol packet;
A network monitoring system, comprising: a registration message transmission processing unit that sends a registration request message including a device type of the monitoring target device and a device name set for monitoring to the extracted monitoring system. The network monitoring system according to claim 4 , wherein the monitoring system further includes a registration message reception processing unit that receives the registration request message. A monitoring system for centrally managing a plurality of monitoring target devices arranged on a monitoring network,
An OSPF protocol processing unit for sending an OSPF protocol packet to the monitoring network and receiving an OSPF protocol packet sent from the plurality of monitoring target devices;
A monitoring system information insertion unit that stores information on the monitoring system in the OSPF protocol packet and distributes the information on the monitoring network;
Having a surveillance system. The monitoring system according to claim 6 , further comprising a registration message reception processing unit that receives a registration request message sent from any of the plurality of monitoring target devices. A monitoring target device that is arranged on a monitoring network and is centrally managed by a monitoring system,
An OSPF protocol processor for sending OSPF protocol packets to the monitoring network and receiving OSPF protocol packets sent from the monitoring system;
A monitoring system information extraction unit that extracts the monitoring system according to the information of the monitoring system stored in the OSPF protocol packet;
A registration message transmission processing unit for sending a registration request message including the device type of the monitored device and the device name set for monitoring to the extracted monitoring system;
A device to be monitored.

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