CN101420343A - Network topology discovery method for EPA network - Google Patents
Network topology discovery method for EPA network Download PDFInfo
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- CN101420343A CN101420343A CNA2008102331592A CN200810233159A CN101420343A CN 101420343 A CN101420343 A CN 101420343A CN A2008102331592 A CNA2008102331592 A CN A2008102331592A CN 200810233159 A CN200810233159 A CN 200810233159A CN 101420343 A CN101420343 A CN 101420343A
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Abstract
The present invention provides a EPA network topology discovering method and relates to an industry Ethernet technology. The method comprises steps of a EPA network monitoring server constructing connection relationship of the EPA bridge according to the network topology information in a EPA bridge network topology information storing module; constructing connection relationship of a EPA switch according to the network topology information in a EPA switch network topology information storing module; constructing connection relationship between the EPA bridge, the EPA switch and the EPA terminal device through the object information of neighbor devices between the switch port and the bridge in the EPA bridge and EPA switch network topology information storing modules; forming a network topology construction drawing according to the connection relationship; The present invention can directly provide renewing information of the EPA network topology structure in time and can provide effective support for the real time monitoring and controlling of the EPA network.
Description
Technical field
The present invention relates to network communications technology field, be specifically related to the method for discovering network topology in a kind of EPA network.
Background technology
Standard GB/T 20171-2006 " EPA (Ethernet forplant automation Industrial Ethernet) system configuration and the communication standard that are used for commercial measurement and control system " (hereinafter to be referred as the EPA standard) formally is issued as publicly available specification (Public AvailableSpecification) IEC/PAS 62409 in May, 2005 by International Electrotechnical Commission (IEC), becomes first industrial automation field international standard that has independent intellectual property right and approved by IEC of China.List in again in October, 2007 real-time ethernet use professional etiquette collection IEC61784-2 (Commom Profile Family 14, CPF14) and the IEC 61158-314/414/514/614 of fieldbus international standard IEC61158 the 4th revised edition.
Network topology is meant the interconnected relationship between entity elements on the network.Network topology can be divided into three-layer network topology and double layer network topology from different abstraction hierarchies.The three-layer network topology refer to network layer (corresponding to the 3rd layer of osi model) equipment and between annexation, promptly router-to-router, router interface are to the annexation of subnet.The actual physics that the double layer network topology refers to a communication network internal entity connects (corresponding to the connection of the second layer equipment of osi model), promptly at legacy network, be meant switch-to-switch, switch to router, switch to the annexation between the equipment, wherein, find that the annexation between the switch-to-switch is the key of physical network topology discovery.Discovering network topology mainly is by the information of acquiring and maintaining network node existence and the connection relation information between them, and draws out whole topology of networks figure on this basis.The network management personnel can position and diagnose by topology information network failure, finds network bottleneck, thereby optimizes the reliability of whole network performance and raising network.
Discovering network topology is the basis of network management system.Discovering network topology can layering show the topological structure of Operation Network, and the cascade menu of topological node is provided, for network performance management, fault management and configuration management etc. provide support.A lot of important network management task all are to be prerequisite with the topology of networks as network resource management, server disposition, event correlation and accident analysis etc.Discovering network topology can comprehensively, dynamically reflect the operation conditions of network, provides strong means for the user monitors whole network.Secondly, measurement has important function to discovering network topology for network traffics, itself is exactly an important component part of network measure.Discovering network topology is for the design of measurement scheme, and the layout of measuring website also plays important effect, and whether it can help the analysis to measure scheme reasonable, determines to measure the number and the particular location thereof of website.By discovering network topology, effectively the state of monitor network device port prevents illegal external equipment access network, ensures the safety of network.
In engineering is used, EPA network of network topological structure and equipment change often, manually often be difficult to the maintaining network topology, after equipment rolls up in the EPA network, network configuration is also complicated unusually, especially situation is more complicated for the large-scale EPA network of thousands of equipment, and at present also not at EPA network of network topology discovery method.
Summary of the invention
In view of this, in order to address the above problem, the invention provides a kind of at EPA network of network topology discovery method, for the real-time monitoring and the control of EPA network provides effective support.
The object of the present invention is achieved like this, EPA network of network topology discovery method, described EPA network comprises the EPA bridge, the EPA bridge, the EPA switch, EPA terminal equipment and EPA network monitoring service device, be provided with the network topological information memory module in described EPA bridge and the EPA switch, described EPA bridge network topological information memory module internal memory contains bridge head object information, bridge port object information and bridge port adjacent device object information, EPA switch network topology information memory module internal memory contains switch head object information, switch ports themselves object information and switch ports themselves adjacent device object information;
Described EPA network of network topology discovery method may further comprise the steps:
1) EPA network monitoring service device reads bridge header information, bridge port object information and bridge port adjacent device object information in the EPA bridge network topological information memory module by the EPA agreement, the annexation of structure EPA bridge;
2) EPA network monitoring service device is by the EPA agreement, read switch head object information, switch ports themselves object information and switch ports themselves adjacent device object information in the EPA switch network topology information memory module, the annexation of structure EPA switch;
3) EPA network monitoring service device is constructed the annexation of EPA bridge and EPA switch and EPA terminal equipment by the bridges and switches port adjacent device object information in EPA bridge and the EPA switch network topology information memory module;
4) EPA network monitoring service device is according to step 1)-3) annexation of gained, draw network topology structure figure.
Further, also have the following steps after the step 4):
5) EPA network monitoring service device obtains the network topology lastest imformation, upgrades network topology structure figure;
Further, described step 5) specifically comprises the steps:
501) EPA equipment sends EPA device asserts message;
502) after the EPA bridge is received described EPA device asserts message, described EPA device asserts message is resolved, judge the jumping figure of described EPA device asserts message, if the jumping figure of this EPA device asserts message is 0, then execution in step 503); Otherwise forward execution in step 505 to);
503) described EPA bridge requester network topology information memory module, if the device object information of described EPA equipment exists in the network topological information memory module, then execution in step 504); Otherwise the device object information of described EPA equipment is added enter the internet topology information memory module, this equipment state is set for movable, and to EPA network monitoring service device transmitting time notification service message, and forward execution in step 505 to);
504) this equipment state is set for movable, and forwards execution in step 505 to);
505) described EPA bridge adds 1 with the jumping figure in the described EPA device asserts message, and transmits this EPA device asserts message;
Further, also comprise the steps: step 505)
506) after EPA network monitoring service device receives EPA device asserts message,, and judge the position of this equipment in network topology, upgrade network topology structure figure with this by hop count field according to type of message judgment device type.
Further, also comprise the steps: step 505)
506) after EPA network monitoring service device receives the notification service message of EPA bridge transmission,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
Further, described step 5) also comprises the steps:
511) the EPA bridge is regularly inquired about bridge port adjacent device object information, obtains the IP of each port adjacent device;
512) the EPA bridge sends the echo request message to adjacent device, according to the return response situation of equipment, upgrades the equipment state in the port adjacent device object information, if equipment state changes, then sends the notification service message to EPA network monitoring service device;
513) after EPA network monitoring service device receives the notification service message of EPA bridge transmission,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
The invention provides a kind of at EPA network of network topology discovery method, for the real-time monitoring and the control of EPA network provides effective support; In further technical scheme, the active discover method and the passive discover method that upgrade at the EPA network topology structure also are provided, EPA network topology structure lastest imformation can timely, accurately must be provided, made the EPA network be easier to safeguard, prevent illegal access, guarantee network security.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.Target of the present invention and other advantages can be passed through following specification, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Embodiment
Below will be described in detail the preferred embodiments of the present invention.
The EPA network comprises EPA bridge, EPA switch, EPA terminal equipment and EPA network monitoring service device, be provided with the network topological information memory module in described EPA bridge and the EPA switch, the network topological information memory module internal memory of EPA bridge contains bridge head object information, bridge port object information and bridge port adjacent device object information, and its data structure is respectively shown in table 1-table 3;
Table 1 bridge head object coding:
| Sequence number | Parameter name | Data type | Read-write properties | Coding site departs from (unit: byte) | Byte length | Explanation |
| 1 | obj_id | uint16 | Read-only | 0 | 2 | The index of bridge head object in local EPA management information bank |
| 2 | ver | Uint16 | Read-only | 2 | 2 | Version number |
| 3 | num_port_obj | uint16 | Read-only | 4 | 2 | The port number of bridge |
Table 2 bridge port object coding table
| Sequence number | Parameter name | Data type | Read-write properties | Coding site departs from (unit: byte) | Byte length | Explanation |
| 1 | Obj_id | Uint16 | Read-only | 0 | 2 | The index of bridge port object in local EPA management information bank |
| 2 | Mac | Uint8 | Read-only | 2 | 6 | The MAC Address of port |
| 3 | State | Uint8 | Read-only | 8 | 1 | The state of port |
| 4 | Config_state | Uint8 | Read/write | 9 | 1 | Port configuration state |
| 5 | Num_adjoin_entry | Uint16 | Read-only | 10 | 2 | The activity number of port adjacent device |
| 6 | Max_num_adjoin | Uint16 | Read/write | 12 | 2 | The adjacent device number of port maximum |
| 7 | First_adjoin_obj | Uint16 | Read-only | 14 | 2 | The obj_id of first adjacent device of port number. |
| 8 | Port_ip; | Uint32 | Read-only | 16 | 4 | The IP address of port |
| 9 | Gnetwork； | uint32 | Read-only | 20 | 4 | The subnet address of port |
Table 3 bridge port adjacent device object coding table:
| Sequence number | Parameter name | Data type | Read-write properties | Coding site departs from (unit: byte) | Byte length | Explanation |
| 1 | obj_id | uint16 | Read-only | 0 | 2 | The index of adjacent device object in local EPA management information bank |
| 2 | mac | uint8 | Read-only | 2 | 6 | The MAC Address of adjacent device |
| 3 | device_type | uint8 | Read-only | 8 | 1 | The type of adjacent device |
| 4 | state | uint8 | Read-only | 9 | 1 | The state of adjacent device |
| 5 | config_state | uint8 | Read/write | 10 | 1 | The configuration state of adjacent device |
| 6 | reserve； | uint8 | Read-only | 11 | 1 | Reserved word |
| 7 | ip； | uint32 | Read-only | 12 | 4 | The IP address of adjacent device |
The network topological information memory module internal memory of EPA switch contains switch head object information, switch ports themselves object information and switch ports themselves adjacent device object information, and its data structure can be provided with reference to the EPA bridge, does not repeat them here;
The EPA network of network topology discovery method of present embodiment comprises the steps:
1) EPA network monitoring service device reads bridge header information, bridge port object information and bridge port adjacent device object information in the EPA bridge network topological information memory module by the EPA agreement, the annexation of structure EPA bridge;
2) EPA network monitoring service device reads switch header information, switch ports themselves object information and switch ports themselves adjacent device object information in the EPA switch network topology information memory module by the EPA agreement, the annexation of structure EPA switch;
3) EPA network monitoring service device is constructed the annexation of EPA bridge and EPA switch and EPA terminal equipment by bridge or switch ports themselves adjacent device object information in EPA bridge and the EPA switch network management information bank;
4) EPA network monitoring service device is according to step 1)-3) annexation of gained, draw network topology structure figure; When showing, at first show the topology diagram of main stor(e)y time, i.e. the topology diagram of network layer device (router and subnet), and do not show the topology of subnet inside; When needs show subnet inner topology structure, reopen a new window and show.Because a subnet internal host quantity is more, if they and router, subnet are presented in the same window, can make whole figure seem messy, and is clear inadequately.Use is based on the algorithm of layering, with the layering of whole viewing area, each equipment all has own affiliated level when the structure topology, and same equipment can not adhere to two different levels separately, they are presented on the own affiliated level separately, and the topological structure that constructs like this is clear.
Step 1-3) in, after EPA network monitoring service device reads described information, it is stored in the facility information chained list of memory of self, when the tectonic network topology diagram, this facility information chained list is carried out traversal search.
5) EPA network monitoring service device obtains the network topology lastest imformation, upgrades network topology structure figure; EPA network monitoring service implement body can obtain the network topology lastest imformation by active discovery mode and/or passive discovery mode;
Wherein passive discovery mode comprises the steps:
501) EPA equipment sends EPA device asserts message;
502) after the EPA bridge is received described EPA device asserts message, described EPA device asserts message is resolved, judge the jumping figure of described EPA device asserts message, if the jumping figure of this EPA device asserts message is 0, then execution in step 503); Otherwise forward execution in step 505 to);
503) described EPA bridge requester network MIB, if the device object information of described EPA equipment exists in the network information management storehouse, then execution in step 504); Otherwise the device object information of described EPA equipment is added into device object table, this equipment state is set for movable, and to host computer transmitting time notification service message, and forward execution in step 505 to);
504) this equipment state is set for movable, and forwards execution in step 505 to);
505) described EPA bridge adds 1 with the jumping figure in the described EPA device asserts message, and transmits this EPA device asserts message;
506) after EPA network monitoring service device receives EPA device asserts message,, and judge the position of this equipment in network topology, upgrade network topology structure figure with this by hop count field according to type of message judgment device type;
Or after EPA network monitoring service device receives the notification service message that the EPA bridge sends,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
Wherein aggressive mode comprises the steps:
511) the EPA bridge is regularly inquired about the device object table of bridge port, obtains the IP of each port adjacent device;
512) the EPA bridge sends the echo request message to adjacent device, and according to the return response situation of equipment, the equipment state in the Object table of updating the equipment if equipment state changes, then sends the notification service message to EPA network monitoring service device;
513) after EPA network monitoring service device receives the notification service message of EPA bridge transmission,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1.EPA the network of network topology discovery method is characterized in that: this method may further comprise the steps:
1) EPA network monitoring service device reads bridge header information, bridge port object information and bridge port adjacent device object information in the EPA bridge network topological information memory module by the EPA agreement, the annexation of structure EPA bridge;
2) EPA network monitoring service device is by the EPA agreement, read switch head object information, switch ports themselves object information and switch ports themselves adjacent device object information in the EPA switch network topology information memory module, the annexation of structure EPA switch;
3) EPA network monitoring service device is constructed the annexation of EPA bridge and EPA switch and EPA terminal equipment by the bridges and switches port adjacent device object information in EPA bridge and the EPA switch network topology information memory module.
4) EPA network monitoring service device is according to step 1)-3) annexation of gained, draw network topology structure figure.
2. EPA network of network topology discovery method according to claim 1 is characterized in that: also have the following steps after the step 4):
5) EPA network monitoring service device obtains the network topology lastest imformation, upgrades network topology structure figure.
3. EPA network of network topology discovery method according to claim 2, it is characterized in that: described step 5) specifically comprises the steps:
501) EPA equipment sends EPA device asserts message;
502) after the EPA bridge is received described EPA device asserts message, described EPA device asserts message is resolved, judge the jumping figure of described EPA device asserts message, if the jumping figure of this EPA device asserts message is 0, then execution in step 503); Otherwise forward execution in step 505 to);
503) described EPA bridge requester network topology information memory module, if the device object information of described EPA equipment exists in the network topological information memory module, then execution in step 504); Otherwise the device object information of described EPA equipment is added enter the internet topology information memory module, this equipment state is set for movable, and to EPA network monitoring service device transmitting time notification service message, and forward execution in step 505 to);
504) this equipment state is set for movable, and forwards execution in step 505 to);
505) described EPA bridge adds 1 with the jumping figure in the described EPA device asserts message, and transmits this EPA device asserts message.
4. EPA network of network topology discovery method according to claim 3 is characterized in that: step 505) after also comprise the steps:
506) after EPA network monitoring service device receives EPA device asserts message,, and judge the position of this equipment in network topology, upgrade network topology structure figure with this by hop count field according to type of message judgment device type.
5. EPA network of network topology discovery method according to claim 3 is characterized in that: step 505) after also comprise the steps:
506) after EPA network monitoring service device receives the notification service message of EPA bridge transmission,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
6. according to claim 3,4 or 5 described EPA network of network topology discovery methods, it is characterized in that: described step 5) also comprises the steps:
511) the EPA bridge is regularly inquired about bridge port adjacent device object information, obtains the IP of each port adjacent device;
512) the EPA bridge sends the echo request message to adjacent device, according to the return response situation of equipment, upgrades the equipment state in the port adjacent device object information, if equipment state changes, then sends the notification service message to EPA network monitoring service device;
513) after EPA network monitoring service device receives the notification service message of EPA bridge transmission,, read the topology information of upgrading in this EPA bridge network management information storehouse and upgrade network topology structure figure with this by the EPA agreement.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102195857A (en) * | 2010-03-18 | 2011-09-21 | 武汉迈威光电技术有限公司 | Network topology structure and node information gathering method |
| CN101631080B (en) * | 2009-08-14 | 2013-04-24 | 重庆邮电大学 | Industrial Ethernet switch based on EPA protocol and message forwarding method |
| CN103501249A (en) * | 2013-09-30 | 2014-01-08 | 上海斐讯数据通信技术有限公司 | Topology management system and method of network management client side |
| CN107124319A (en) * | 2017-06-14 | 2017-09-01 | 贵州电网有限责任公司 | A kind of topological Dynamic Recognition device of the intelligent substation network equipment matched based on MAC Address |
| CN109376217A (en) * | 2018-10-08 | 2019-02-22 | 海南大学 | Based on the architecture of value, the node set of typing frequency nominal data map and its topological structure determine method entirely |
| CN110430265A (en) * | 2019-08-06 | 2019-11-08 | 北京奇艺世纪科技有限公司 | A kind of method and device obtaining server and inter-exchange corresponding relationship |
| CN111355599A (en) * | 2018-12-20 | 2020-06-30 | 北京国基科技股份有限公司 | Hybrid network topology discovery method and device |
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| CN101159718B (en) * | 2007-08-03 | 2010-06-16 | 重庆邮电大学 | Embedded type industry ethernet safety gateway |
| CN101262473B (en) * | 2007-12-28 | 2011-01-26 | 上海自动化仪表股份有限公司 | EPA industrial Ethernet and HART field bus interconnection method |
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- 2008-11-28 CN CN2008102331592A patent/CN101420343B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101631080B (en) * | 2009-08-14 | 2013-04-24 | 重庆邮电大学 | Industrial Ethernet switch based on EPA protocol and message forwarding method |
| CN102195857A (en) * | 2010-03-18 | 2011-09-21 | 武汉迈威光电技术有限公司 | Network topology structure and node information gathering method |
| CN103501249A (en) * | 2013-09-30 | 2014-01-08 | 上海斐讯数据通信技术有限公司 | Topology management system and method of network management client side |
| CN103501249B (en) * | 2013-09-30 | 2018-01-16 | 上海斐讯数据通信技术有限公司 | A kind of NM client topology management system and method |
| CN107124319A (en) * | 2017-06-14 | 2017-09-01 | 贵州电网有限责任公司 | A kind of topological Dynamic Recognition device of the intelligent substation network equipment matched based on MAC Address |
| CN107124319B (en) * | 2017-06-14 | 2020-06-26 | 贵州电网有限责任公司 | Intelligent substation network equipment topology dynamic identification device based on MAC address matching |
| CN109376217A (en) * | 2018-10-08 | 2019-02-22 | 海南大学 | Based on the architecture of value, the node set of typing frequency nominal data map and its topological structure determine method entirely |
| CN111355599A (en) * | 2018-12-20 | 2020-06-30 | 北京国基科技股份有限公司 | Hybrid network topology discovery method and device |
| CN110430265A (en) * | 2019-08-06 | 2019-11-08 | 北京奇艺世纪科技有限公司 | A kind of method and device obtaining server and inter-exchange corresponding relationship |
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Effective date of registration: 20181217 Address after: 400065 Nanfuyuan District, Chongwen Road, Nanan District, Chongqing Patentee after: Wei Min Address before: 400065 No. 2 Chongwen Road, Huang Jue ya, Nan'an District, Chongqing Patentee before: Chongqing University of Posts and Telecommunications |
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