CN107465622A - A kind of method and system that discovering network topology is realized using LLDP - Google Patents
A kind of method and system that discovering network topology is realized using LLDP Download PDFInfo
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- CN107465622A CN107465622A CN201710930195.3A CN201710930195A CN107465622A CN 107465622 A CN107465622 A CN 107465622A CN 201710930195 A CN201710930195 A CN 201710930195A CN 107465622 A CN107465622 A CN 107465622A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention discloses a kind of method and system that discovering network topology is realized using LLDP, the LLDP for setting port is aggressive mode or Passive Mode, and judge whether the LLDP of sending port is aggressive mode, if sending port is aggressive mode, then platform sends the LLDP messages with topological TLV, receiving port judges whether the LLDP that receives carries topological TLV fields, if that receiving port receives is the LLDP for not carrying topological TLV fields, on send LLDP messages to platform processes；That if receiving port receives is the LLDP for carrying topological TLV fields, then judge in topological TLV fields whether the included port information of oneself, if including the port information of oneself in topological TLV fields, ignore and abandon the LLDP messages；Compared with existing LLDP, newly-increased topological TLV fields can be recorded effectively all of the port information on path is all orderly, so as to can effectively supervise whole network topology from Centroid, and can upgrade in time and record change in topology.
Description
Technical field
The present invention relates to a kind of method and system for realizing discovering network topology, is specially that one kind realizes network using LLDP
The method and system of Topology Discovery.
Background technology
At present, the species of the network equipment it is increasingly various and it is respective configuration it is intricate, in order that the equipment of different vendor
It can mutually find in a network and the respective system of interaction and configuration information are, it is necessary to there is the information intercourse platform of a standard.
LLDP (Link Layer Discovery Protocol, Link Layer Discovery Protocol) is exactly in this context
It is caused, it provide a kind of standard link layer find mode, can by the unique ability of local device, management IP, set
The information such as standby mark, interface identifier are organized into different TLV (Type/Length/Value, type/length/value), and are encapsulated in
Issued in LLDPDU (Link Layer Discovery Protocol Data Unit, Link Layer Discovery Protocol data cell)
Give oneself direct-connected neighbour, neighbours are received it after these information with standard mib (Management Information
Base, management information bank) form save, so that the communication conditions of link are inquired about and judged to NMS.
In brief, LLDP is a kind of neighbouring discovery agreement.It is ethernet network device, as interchanger, router and
Wireless local network connecting point defines a kind of method of standard, its other node into network is announced the presence of itself,
And preserve the discovery information of each nearby device.Such as the details such as device configuration and equipment identification can be entered with the agreement
Row bulletin.
Specifically, LLDP defines a general notice information collection, the agreement that a transmission is announced and one kind and is used for depositing
The method of the received notice information of storage.A plurality of notice information can be placed on one LAN by announcing the equipment of self information
Transmitted in packet, the form of transmission is type lengths values (TLV) domain.
Transmission mechanism
Device port periodically can send LLDP messages to neighbor device.If being locally configured and change of equipment
LLDP messages are sent immediately, and the situation of change of local information is notified to neighbor device as early as possible.But in order to prevent local information
Frequent change and cause a large amount of transmissions of LLDP messages, often send a LLDP message after all need postpone a period of time after followed by
Supervention send next message.
Reception mechanism
Device port can carry out validity check to the LLDP messages and its TLV of carrying received, by again will after inspection
Neighbor information is saved in local, and sets neighbor information according to the value of TTL in TTL (Time To Live, life span) TLV
Ageing time on the local device, if the value is zero, the neighbor information of aging at once.
Current LLDP can realize that the port links of neighbouring device are found, but realize whole network currently without correlation technique
The port links of topology find, as shown in Fig. 2 equipment R1 can not discovering device R2 and equipment R3 link port information.
The content of the invention
The present invention provides a kind of method and system that discovering network topology is realized using LLDP, can effectively solve background skill
The problem of in art.
In order to solve the above-mentioned technical problem, the invention provides following technical scheme：
A kind of method and system that discovering network topology is realized using LLDP of the present invention, is comprised the following steps：
The first step, the LLDP for setting port are aggressive mode or Passive Mode, and judge sending port LLDP whether be
Aggressive mode.
As a preferred technical solution of the present invention, second step, if sending port is aggressive mode, platform sends band
There are a topological TLV LLDP messages, topological TLV belongs to port information list collection, and a list includes a port information, one
Port information includes port mac, management IP, device identification, interface identifier；If sending port is not aggressive mode, platform hair
Send the general LLDP messages without topological TLV.
As a preferred technical solution of the present invention, the 3rd step, whether the LLDP that receiving port judges to receive, which carries, is opened up
Flutter TLV fields.
As a preferred technical solution of the present invention, the 4th step, if what receiving port received is not carry topological TLV words
Section LLDP, then on send LLDP messages to platform processes；If that receiving port receives is the LLDP for carrying topological TLV fields,
Judge again in topological TLV fields whether the included port information of oneself.
As a preferred technical solution of the present invention, the 5th step, if believing in topological TLV fields comprising the port of oneself
Breath, then ignore and abandon the LLDP messages；If not including the port information of oneself in topological TLV fields, then judge receiving terminal
Whether mouth is Passive Mode.
As a preferred technical solution of the present invention, the 6th step, if receiving port is not Passive Mode, on send LLDP
Packet platform processing；If receiving port is Passive Mode, in topological TLV increase receiving port information, and on send portion
LLDP messages are to platform processes, while the message that floods is to other Passive Mode ports.
As a preferred technical solution of the present invention, the 7th step, when the port that floods sends LLDP messages, sending port
Orderly information is added to the port information list concentration for extending topological TLV.
As a preferred technical solution of the present invention, the 8th step, when next receiving port receives LLDP messages, then
Repeat the flow of the 3rd step to the 7th step.
The beneficial effect that is reached of the present invention is：Compared with existing LLDP, newly-increased topological TLV fields can effective handle
All of the port information is all orderly on path records, and is opened up so as to can effectively supervise whole network from Centroid
Flutter, and can upgrade in time and record change in topology.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart for the method and system that discovering network topology is realized using LLDP of the present invention；
Fig. 2 is a kind of introduction of the usage scenario for the method and system that discovering network topology is realized using LLDP of the present invention
Figure；
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Embodiment：As shown in Figure 1-2, a kind of method and system that discovering network topology is realized using LLDP of the present invention, bag
Include following steps：
The first step, the LLDP for setting port are aggressive mode or Passive Mode, and judge sending port LLDP whether be
Aggressive mode.
Second step, if sending port is aggressive mode, platform sends the LLDP messages with topological TLV, topological TLV category
In port information list collection, a list includes a port information, and a port information includes port mac, management IP, set
Standby mark, interface identifier；If sending port is not aggressive mode, platform sends the general LLDP messages without topological TLV.
3rd step, receiving port judge whether the LLDP received carries topological TLV fields.
4th step, if that receiving port receives is the LLDP for not carrying topological TLV fields, on send LLDP messages to platform
Processing；That if receiving port receives is the LLDP for carrying topological TLV fields, then judges whether wrapped in topological TLV fields
Containing the port information of oneself.
5th step, if including the port information of oneself in topological TLV fields, ignore and abandon the LLDP messages；If open up
Flutter and do not include the port information of oneself in TLV fields, then judge whether receiving port is Passive Mode again.
6th step, if receiving port is not Passive Mode, on send LLDP packet platforms handle；If receiving port is passive
Pattern, then increase receiving port information in topological TLV, and on send a LLDP messages to platform processes, while the report that floods
Text arrives other Passive Mode ports.
7th step, when the port that floods sends LLDP messages, sending port orderly information is added to the end for extending topological TLV
Mouth information list is concentrated.
8th step, when next receiving port receives LLDP messages, repeat the flow of the 3rd step to the 7th step.
This kind realizes the method and system of discovering network topology using LLDP, compared with existing LLDP, newly-increased topological TLV
Field can be recorded effectively all of the port information on path is all orderly, so as to can be effective from Centroid
Whole network topology is supervised, and can upgrade in time and record change in topology.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (8)
1. a kind of method and system that discovering network topology is realized using LLDP, it is characterised in that comprise the following steps：
The first step, the LLDP for setting port is aggressive mode or Passive Mode, and judges whether the LLDP of sending port is actively
Pattern.
A kind of 2. method and system that discovering network topology is realized using LLDP according to claim 1, it is characterised in that
Second step, if sending port is aggressive mode, platform sends the LLDP messages with topological TLV, and topological TLV belongs to port letter
Cease list collection, a list includes a port information, a port information include port mac, manage IP, device identification,
Interface identifier；If sending port is not aggressive mode, platform sends the general LLDP messages without topological TLV.
A kind of 3. method and system that discovering network topology is realized using LLDP according to claim 2, it is characterised in that
3rd step, receiving port judge whether the LLDP received carries topological TLV fields.
A kind of 4. method and system that discovering network topology is realized using LLDP according to claim 3, it is characterised in that
4th step, if that receiving port receives is the LLDP for not carrying topological TLV fields, on send LLDP messages to platform processes；If
That receiving port receives is the LLDP for carrying topological TLV fields, then judge again in topological TLV fields whether it is included oneself
Port information.
A kind of 5. method and system that discovering network topology is realized using LLDP according to claim 4, it is characterised in that
5th step, if including the port information of oneself in topological TLV fields, ignore and abandon the LLDP messages；If topological TLV fields
In do not include the port information of oneself, then judge whether receiving port is Passive Mode again.
A kind of 6. method and system that discovering network topology is realized using LLDP according to claim 5, it is characterised in that
6th step, if receiving port is not Passive Mode, on send LLDP packet platforms handle；If receiving port is Passive Mode,
Increase receiving port information in topological TLV, and on send a LLDP messages to platform processes, while the message that floods arrives other
Passive Mode port.
A kind of 7. method and system that discovering network topology is realized using LLDP according to claim 6, it is characterised in that
7th step, when the port that floods sends LLDP messages, sending port orderly information is added to the port information row for extending topological TLV
Table is concentrated.
A kind of 8. method and system that discovering network topology is realized using LLDP according to claim 7, it is characterised in that
8th step, when next receiving port receives LLDP messages, repeat the flow of the 3rd step to the 7th step.
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| CN110401568A (en) * | 2019-07-31 | 2019-11-01 | 普联技术有限公司 | A kind of method for discovering network topology and equipment |
| CN112532462A (en) * | 2020-12-17 | 2021-03-19 | 安徽皖通邮电股份有限公司 | Method for discovering information of OTN link of packet enhanced OTN equipment |
| CN116032770A (en) * | 2022-12-28 | 2023-04-28 | 天翼云科技有限公司 | LLDP-based topology link discovery method |
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