CN105897490A - Automatic network topology discovery method - Google Patents
Automatic network topology discovery method Download PDFInfo
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- CN105897490A CN105897490A CN201610470711.4A CN201610470711A CN105897490A CN 105897490 A CN105897490 A CN 105897490A CN 201610470711 A CN201610470711 A CN 201610470711A CN 105897490 A CN105897490 A CN 105897490A
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- equipment
- interface
- detecting devices
- mac address
- cluster tool
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- 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
Abstract
The invention discloses an automatic network topology discovery method. The automatic network topology discovery method comprises the following steps: setting an IP of discovery source equipment and setting the discovery source equipment as detection equipment; acquiring basic information of the detection equipment and analyzing an MAC address of an address forwarding table of the detection equipment; if the MAC address corresponding to the detection equipment is not in a discovered equipment set, adding the detection equipment in the discovered equipment set, and judging whether the detection equipment is detectable equipment or not through the MAC address of the detection equipment, and if the judging result is positive, adding the detection equipment in a detectable equipment set; if the MAC address corresponding to the detection equipment is in the discovered equipment set, judging whether equipment of which address forwarding information is not analyzed, exists in the detectable equipment set or not, and if the judging result is positive, setting the equipment as detection equipment; if the equipment of which the address forwarding information is not analyzed, does not exist in the detectable equipment set, generating connection relationship among all the detection equipment in the discovered equipment set.
Description
Technical field
The present invention relates to the network topology of the exchange network being made up of switch, be specifically related to a kind of network topology
Automatic discovering method.
Background technology
In the network management software, it is necessary for constructing network topological diagram directly perceived, visual.Pass through
Tectonic network topological diagram can convenient and efficient management network, find the exception in network.If net
Treating in network that tube apparatus quantity is more, obtaining network topology by the way of manual typing can cumbersome and ratio
It is easier to make mistakes.And the main purpose of automatic topology discovery is automatically to obtain between network node and they
Connection relation information, it is to avoid loaded down with trivial details manual entry process.
At present, many automatic Topology Discovery Algorithms are all based on route forwarding table, according to SNMP MIB
In table ipRouteTable carry out Topology Discovery, this mode can only find router in network system and
Subnet, the internal structure for subnet is still known nothing, it is impossible to identifies the switching equipment in network and does not has
There is the dummy argument equipment specifying IP address, and the equipment supporting snmp can only be suitable for by it.
Summary of the invention
For above-mentioned deficiency of the prior art, the automatic discovering method of the network topology that the present invention provides is permissible
From the beginning of any one detectable switch, use the mode with deep search that dissipates to obtain management network and open up
The annexation of all devices in flutterring.
In order to reach foregoing invention purpose, the technical solution used in the present invention is:
Thering is provided the automatic discovering method of a kind of network topology, it comprises the following steps:
The IP finding source device is set, and discovery source device is set to detecting devices；
Obtain the essential information of detecting devices, and analyze the MAC Address of the addresses forwarding table of detecting devices:
If the MAC Address corresponding with detecting devices be not in having been found that cluster tool, then detecting devices is added
Have been found that in cluster tool, and judge whether it is detectable equipment by the MAC Address of detecting devices, if
It is then detecting devices to be added in detectable cluster tool；
If the MAC Address corresponding with detecting devices is in having been found that cluster tool, then judge detectable equipment collection
Whether conjunction there is also the equipment not analyzing its addresses forwarding table information, if having, be then set to detection and set
Standby；
If detectable cluster tool does not exist the equipment not analyzing its addresses forwarding table information, then generate and send out
Show the annexation between all detecting devices in cluster tool.
The invention have the benefit that this programme is by turning the address on detecting devices (switch) interface
The MAC Address delivered is as the filter condition of discovering network topology process, thus accelerates by group of switches
The search of the exchange network become.
It addition, use this method exchange network to being made up of switch to carry out the structure of topology, it can not only
Enough accurately understand the internal structure of subnet in exchange network by the addresses forwarding table information in exchange interface,
It can also identify the switching equipment in exchange network and not specify the dummy argument equipment of IP address.
Accompanying drawing explanation
Fig. 1 is the flow chart of the automatic discovering method of network topology.
Detailed description of the invention
Below the detailed description of the invention of the present invention is described, in order to those skilled in the art manage
Solve the present invention, it should be apparent that the invention is not restricted to the scope of detailed description of the invention, to the art
From the point of view of those of ordinary skill, if the essence of the present invention that various change limits in appended claim and determines
In god and scope, these changes are apparent from, and all utilize the innovation and creation of present inventive concept all protecting
The row protected.
The flow chart of the automatic discovering method of network topology is shown with reference to Fig. 1, Fig. 1；As it is shown in figure 1, should
Method is mainly made up of two parts, and it is that equipment finds and link convergence two parts respectively；Wherein equipment finds
Comprise the following steps:
The IP finding source device is set, and discovery source device is set to detecting devices；
Obtain the essential information of detecting devices, and analyze the MAC Address of the addresses forwarding table of detecting devices:
If the MAC Address corresponding with detecting devices be not in having been found that cluster tool, then detecting devices is added
Have been found that in cluster tool, and judge whether it is detectable equipment by the MAC Address of detecting devices, if
It is then detecting devices to be added in detectable cluster tool.
When carrying out the structure of network topology, establishment is needed to have been found that cluster tool and detectable cluster tool,
Just created has been found that in cluster tool and detectable cluster tool it is to there is not detecting devices, spy therein
Measurement equipment gradually forms during discovering network topology.
If the MAC Address corresponding with detecting devices is in having been found that cluster tool, then judge detectable equipment collection
Whether conjunction there is also the equipment not analyzing its addresses forwarding table information, if having, be then set to detection and set
Standby, return the essential information performing to obtain detecting devices, and analyze the MAC of the addresses forwarding table of detecting devices
Address step.
The convergence of link is: do not analyze setting of its addresses forwarding table information if not existing in detectable cluster tool
Standby, after i.e. equipment has found, generation has been found that the annexation in cluster tool between all detecting devices.
When implementing, realize generation by step 1 cited below to step 7 and have been found that institute in cluster tool
There is the annexation between detecting devices；When link convergence, it is necessary first to the exchange being made up of switch
Part term in network is defined, with specific reference to following 9 definition:
Definition 1: making i-th equipment in network is Di, DiThe interface of jth connected device be Dij。
Definition 2: if equipment DiThe interface of each connected device can find the annexation of its correspondence,
Then it is referred to as equipment DiFor convergence equipment.
Definition 3:AOijFor equipment DiAddresses forwarding table in by interface DijThe MAC Address received is (physically
Location or hardware address) set.
Definition 4:AiFor equipment DiAll MAC Address set of being received of addresses forwarding table.
Definition 5:ADijFor equipment DiAOijRemove the set after the MAC Address of convergence equipment.
Definition 6:VijFor equipment DiAddresses forwarding table in by interface DijVlan information set.
Definition 7: if unique MAC Address that the interface of each connected device of equipment receives, then claim this equipment
For leaf equipment.
Definition 8: if upper layer device DiInterface DijThe AO receivedijIt is integrated into infrastructure devices DjAjIn can
Find, then equipment DiWith equipment DjExist direct-connected；If equipment DjInterface DjjAOjjIn can acquire equipment
DiMAC Address, then interface DijWith interface DjjBetween exist connect.
Definition 9:DleafeFor the set of all leaf equipment, DdetectingFor the equipment of interface connection need to be restrained
Set, Ddetect_allFor the set of all convergence equipments.
Have been found that in cluster tool all detections set to definition 9 to realizing generation below in conjunction with definition 1 above
The concrete grammar of the annexation between Bei is described in detail:
In step 1, the interface of detectable cluster tool inner connection terminal or the leaf equipment of server is entered
Row convergence；Step 1, when restraining the interface of leaf equipment, includes again step in detailed below:
Step 11: obtain device A DijIn unique MAC, remember DjEquipment corresponding to MAC；
Step 12: if DjFor detecting devices, then perform step 13；If DjFor non-detecting devices, then perform
Step 4；If DjFor unknown device, then perform step 15.
Step 13:DiIt is defined as infrastructure devices, DjIt is defined as upper layer device, according to defining 8 judgement equipment is
No it is joined directly together.
Step 14:DiInterface DijWith equipment DjIt is connected, deletes DdetectingThe not converged interface of middle equipment is corresponding
AD comprises DjThe element of MAC Address.
Step 15:DiInterface DijWith equipment DjIt is connected, but end interface can not be determined, delete DdetectingIn
Equipment not converged interface corresponding A D comprises DjThe element of MAC Address.
Step 16: judge D according to definition 2iBe whether convergence equipment, if convergence equipment then by device from
DleafeIn remove, add Ddetect_allIn, delete DdetectingMiddle equipment not converged interface corresponding A D comprises DiMAC
The element of address；Otherwise by its DleafeIn remove, add DdetectingIn.
Step 17: after having traveled through all leaf equipment, judges D according to definition 2detectingIn each equipment be
No is convergence equipment, if convergence equipment, then by it from DdetectingIn remove, and add Ddetect_all,
Delete DdetectingMiddle equipment not converged interface corresponding A D comprises the element of device mac address.
In step 2, after leaf equipment interface has been restrained, if there is not converged connecing in detectable cluster tool
The detecting devices of an only MAC Address in Kou, then to an only MAC in this detecting devices convergence interface
The interface of address is restrained.
In one embodiment of the invention, below in conjunction with step 21 to step 23 further in step 2
Specific implementation be described in detail:
Step 21: obtain device A DijIn unique MAC, remember DjEquipment corresponding to MAC；
Step 22: the device definition that type level is high is upper layer device, under the device definition that type level is low is
Layer equipment, separately processes with type equipment, judges whether equipment is joined directly together according to defining 8；
Step 23: traveled through DdetectingIn not converged, and after the unique interface of interface message, according to definition 2
Judge DdetectingIn each equipment be whether convergence equipment, if convergence equipment, then by it from Ddetecting
In remove, and add Ddetect_all, delete DdetectingMiddle equipment not converged interface corresponding A D comprises equipment
The element of MAC Address.
In step 3, the detecting devices interface of addresses forwarding table record is corresponded to multiple MAC Address, and
When these MAC Address are not the MAC Address interface of detecting devices, to detecting devices corresponding to multiple MAC
The interface of address is restrained.This method is understood, below in conjunction with step 31 to step 33 in order to assist further
Step 3 is described in detail:
Step 31: obtain device A DijMiddle MAC group, finds the equipment that MAC group is corresponding, by these equipment marks
It is designated as an equipment Dj；
Step 32:DiInterface DijWith equipment DjIt is connected, deletes DdetectingThe not converged interface of middle equipment is corresponding
AD comprises DjThe element of MAC Address in MAC group；
Step 33: processed DdetectingIn after this type of situation, and not converged interface, according to definition 2 judgement
DdetectingIn each equipment be whether convergence equipment, if convergence equipment, then by it from DdetectingMiddle shifting
Remove, and add Ddetect_all, delete DdetectingMiddle equipment not converged interface corresponding A D comprises equipment MAC ground
The element of location.
In step 4, traversal detecting devices exists in not converged interface the interface of multiple identical MAC Address,
And these interfaces are restrained；This method is understood, below in conjunction with step 41 to step in order to assist further
43 pairs of steps 4 are described in detail:
Step 41: obtain device A DijIn unique MAC, remember DjEquipment corresponding to MAC；
Step 42: the device definition that type level is high is upper layer device, under the device definition that type level is low is
Layer equipment, separately processes with type equipment, judges whether equipment is joined directly together according to defining 8.
Step 43: traveled through DdetectingIn not converged, and there is many MAC Address in interface, but all MAC are
After identical interface, judge D according to definition 2detectingIn each equipment be whether convergence equipment, if
For convergence equipment, then by it from DdetectingIn remove, and add Ddetect_all, delete DdetectingMiddle equipment
Not converged interface corresponding A D comprises the element of device mac address.
In steps of 5, travel through in detectable cluster tool not converged in all detecting devices and exist multiple not
With the interface of detecting devices MAC, and these interfaces are restrained.Right to definition 9 below in conjunction with definition 1
The concrete still mode of step 5 illustrates:
Step 51: selected equipment ADijIn the MAC of detecting devices of some unselected mistake, remember DjFor institute
Choose equipment corresponding to MAC.If device A DijIn the most there is not the MAC of detecting devices of unselected mistake, then
Perform step 53.
Step 52: the device definition that type level is high is upper layer device, under the device definition that type level is low is
Layer equipment, separately processes with type equipment, judges whether equipment is joined directly together according to defining 8.No DiWith Dj
Between be joined directly together, then perform step 53, otherwise, then perform step 51.
Step 53: traveled through DdetectingIn not converged, and after there is the interface of multiple obstructed MAC in interface, root
D is judged according to definition 2detectingIn each equipment be whether convergence equipment, if convergence equipment, then will
It is from DdetectingIn remove, and add Ddetect_all, delete DdetectingEquipment not converged interface corresponding A D is wrapped
Element containing device mac address.
In step 6, if the addresses forwarding table after equipment interface updates in detectable cluster tool is not deposited
At address forwarding information, but there is address forwarding information, then this equipment in the original addresses forwarding table of detecting devices
There is switching equipment cascade in interface, and restrains subtending port between switching equipment.
In one embodiment of the invention, below in conjunction with step 61 to step 64 further in step 6
Specific implementation be described in detail:
Step 61: selected equipment AOijIn the MAC of detecting devices of some unselected mistake, remember DjFor institute
Choose equipment corresponding to MAC.If device A OijIn the most there is not the MAC of detecting devices of unselected mistake, then
Perform step 4.
Step 62: by DjInterface in have DiThe interface of facility information is designated as DjjIf, DjjRestrain, then hold
Row step 3；Otherwise, D is madejFor upper layer device, DiFor infrastructure devices, whether judge equipment according to definition 8
It is joined directly together, if DiAnd DjBetween non-immediate be connected, the most separately process.
Step 63: make DjjInterfacing device is Dj, repeat step 62.
Step 64: traveled through DdetectingIn not converged, and after there is the interface of multiple obstructed MAC in interface, root
D is judged according to definition 2detectingIn each equipment be whether convergence equipment, if convergence equipment, then will
It is from DdetectingIn remove, and add Ddetect_all, delete DdetectingEquipment not converged interface corresponding A D is wrapped
Element containing device mac address.
Step 7, travels through all not converged interfaces in detectable cluster tool, and to all not converged interfaces
Carry out blindly restraining.During enforcement, described carry out all not converged interfaces blindly restraining farther including:
Obtain MAC Address in the addresses forwarding table information of not converged interface；
Find corresponding detecting devices by MAC Address, and judge not converged interface with find with
Whether the detecting devices corresponding to MAC Address is joined directly together:
If being joined directly together, then update the detecting devices of this not converged interface and the equipment that MAC Address is MAC
Interface IP address forward table information；
Judge that whether each detecting devices in detectable cluster tool is convergence equipment, if restraining
Equipment, then remove it from detectable cluster tool.
For step 7 when combining definition 1 and being described to definition 9, it can be expressed as:
Step 71: choose DdetectingIn an equipment, the not converged interface of some of this equipment has DiCorresponding
MAC Address record, the equipment that takes of alternative is Dj, DjIn have DiThe interface of corresponding MAC Address record is
Djj。
Step 72: if DiAnd DjStep 3 is then performed for different types of equipment, if DiAnd DjFor similar
The equipment of type then performs step 74.
Step 73: if DiAnd DjFor different types of equipment, the device definition that type level is high is that upper strata sets
Standby, the device definition that type level is low is infrastructure devices, judges whether equipment is joined directly together according to defining 8,
It is connected if non-immediate between them, performs step 71.
Step 74: if DiAnd DjFor same type equipment, make DiFor upper layer device, DjFor infrastructure devices, root
Judge whether equipment is joined directly together according to defining 8, if DiAnd DjNon-immediate connected, then make DjSet for upper strata
Standby, DiFor infrastructure devices, judge whether equipment is joined directly together according to defining 8, if DiAnd DjNon-immediate
Connected then perform step 71.
Step 75: traveled through DdetectingIn after not converged interface, judge D according to definition 2detectingIn each
Whether equipment is convergence equipment, if convergence equipment, then by it from DdetectingIn remove, and add
Ddetect_all, delete DdetectingEquipment not converged interface corresponding A D comprises the element of device mac address.
In sum, the method provided by this programme, it can be accelerated the switching network being made up of switch
The search of network, it is possible to accurately understand subnet in exchange network by the addresses forwarding table information in exchange interface
Internal structure, it can also identify the switching equipment in exchange network and not specify IP address simultaneously
Dummy argument equipment.
Claims (4)
1. the automatic discovering method of network topology, it is characterised in that comprise the following steps:
The IP finding source device is set, and discovery source device is set to detecting devices；
Obtain the essential information of detecting devices, and analyze the MAC Address of the addresses forwarding table of detecting devices:
If the MAC Address corresponding with detecting devices be not in having been found that cluster tool, then detecting devices is added
Have been found that in cluster tool, and judge whether it is detectable equipment by the MAC Address of detecting devices, if
It is then detecting devices to be added in detectable cluster tool；
If the MAC Address corresponding with detecting devices is in having been found that cluster tool, then judge detectable equipment collection
Whether conjunction there is also the equipment not analyzing its addresses forwarding table information, if having, be then set to detection and set
Standby；
If detectable cluster tool does not exist the equipment not analyzing its addresses forwarding table information, then generate and send out
Show the annexation between all detecting devices in cluster tool.
The automatic discovering method of network topology the most according to claim 1, it is characterised in that described life
The annexation having been found that in cluster tool between all detecting devices is become to further include steps of
Step 1, receives the interface of detectable cluster tool inner connection terminal or the leaf equipment of server
Hold back；
, after leaf equipment interface has been restrained, if there is not converged interface in detectable cluster tool in step 2
In the detecting devices of an only MAC Address, then to an only MAC in this detecting devices convergence interface
The interface of address is restrained；
Step 3, corresponds to multiple MAC Address, and these to the detecting devices interface of addresses forwarding table record
When MAC Address is not the MAC Address interface of detecting devices, to detecting devices corresponding to multiple MAC
The interface of address is restrained；
, in traversal detecting devices, in not converged interface, there is the interface of multiple identical MAC Address in step 4, and
These interfaces are restrained；
Step 5, not converged and there is multiple different detection in all detecting devices in traveling through detectable cluster tool
The interface of equipment MAC, and these interfaces are restrained；
, if the most there is not address in the addresses forwarding table after equipment interface updates in detectable cluster tool in step 6
Forwarding information, but there is address forwarding information in the original addresses forwarding table of detecting devices, then and this equipment interface is deposited
Cascade at switching equipment, and subtending port between switching equipment is restrained；
Step 7, travels through all not converged interfaces in detectable cluster tool, and to all not converged interfaces
Carry out blindly restraining.
The automatic discovering method of network topology the most according to claim 1, it is characterised in that described right
All not converged interfaces carry out blindly restraining farther including:
Obtain MAC Address in the addresses forwarding table information of not converged interface；
Find corresponding detecting devices by MAC Address, and judge not converged interface with find with
Whether the detecting devices corresponding to MAC Address is joined directly together:
If being joined directly together, then the detecting devices updating this not converged interface is the equipment of MAC with MAC Address
Interface IP address forward table information；
Judge that whether each detecting devices in detectable cluster tool is convergence equipment, if restraining
Equipment, then remove it from detectable cluster tool.
4. according to the automatic discovering method of the network topology described in Claims 2 or 3, it is characterised in that institute
Convergence equipment is the annexation that each interface connected can find its correspondence；Described leaf equipment is
The equipment of unique MAC Address that the interface of each connected device receives.
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| CN201610470711.4A CN105897490A (en) | 2016-06-24 | 2016-06-24 | Automatic network topology discovery method |
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| CN201610470711.4A CN105897490A (en) | 2016-06-24 | 2016-06-24 | Automatic network topology discovery method |
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| CN110247784A (en) * | 2018-03-07 | 2019-09-17 | 北京京东尚科信息技术有限公司 | The method and apparatus for determining network topology structure |
| WO2020007372A1 (en) * | 2018-07-06 | 2020-01-09 | 东莞市李群自动化技术有限公司 | Control method and device employing industrial ethernet |
| CN116827801A (en) * | 2023-08-25 | 2023-09-29 | 武汉吧哒科技股份有限公司 | Network topology construction method, device, computer equipment and readable storage medium |
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Application publication date: 20160824 |