CN102571589B - Network communications method, equipment and system - Google Patents
Network communications method, equipment and system Download PDFInfo
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- CN102571589B CN102571589B CN201210013861.4A CN201210013861A CN102571589B CN 102571589 B CN102571589 B CN 102571589B CN 201210013861 A CN201210013861 A CN 201210013861A CN 102571589 B CN102571589 B CN 102571589B
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Abstract
The embodiment of the invention relates to a network communication method, equipment and system. The network communication method comprises the steps of: receiving a connection error message sent by first adjacent equipment, wherein the connection error message carries the information representing the connection error of the port of the first adjacent equipment in a receiving direction; determining that a second adjacent equipment different from the first adjacent equipment exists in the equipment, setting the port of the equipment to be a delay forbidding state and starting a delay forbidding timer with a preset time cycle; before the delay forbidding timer exceeds the time, determining that an announcement message sent by the second adjacent equipment is received; and stopping the delay forbidding timer according to the received announcement message sent by the second adjacent equipment, and setting the port of the equipment to be an announcement state. By adopting the network communication method, equipment and system, under the condition that one-way links generate in a multiple-neighbor-group network, the flow forwarding among other neighbors is uninterrupted, the service efficiency of the multiple-neighbor-group network is improved and the network flow forwarding reliability in the multiple-neighbor-group network is improved.
Description
Technical field
The embodiment of the present invention relates to network communication field, and more specifically, relates to network communication method, equipment and system.
Background technology
There is optical fiber interconnection in real network sometimes, optical fiber do not connect, the situation of a line broken circuit in an optical fiber or twisted-pair feeder, now one of the port of both link ends can receive the link layer message that opposite end sends, but opposite end can not receive the message that local terminal sends, and this link is one way link.In one way link, because physical layer is in connected state, can normally work, thus the testing mechanism (as Automatic Negotiation Mechanism) of physical layer cannot communication existing problems between discovering device, thus cause the mistake of flow to forward.
The effect of device link detection protocol (Device Link Detection Protocol is called for short DLDP) is exactly the existence of detection one way link and takes corresponding measure.It is responsible on the equipment connected by optical fiber or copper twisted pair, the Link State of monitors physical circuit.When after discovery one way link, send a warning message to user, and according to user's configuration, automatically close or notify that user closes related port by hand, to prevent the generation of network problem.
DLDP supports to enable DLDP protocol detection one way link between multiple equipment connected by hub (hub), and now each Port detecting has the neighbours of more than 1 to the port.As shown in Figure 1, device A is connected with equipment B, C, D by hub in the typical networking of many neighbours, and each equipment all supports DLDP, and line is common netting twine or optical fiber.In the network environment of many neighbours, in order to correctly detect the one way link that may exist, require that the port be connected on hub all needs to enable DLDP.When there are many neighbours, port, once have received the connection that one of neighbours send and make mistakes after (LinkDown) message, namely enters Disable state.More than figure is example, after device A, C, D receive the connection error message that neighbours B sends, all the port of this equipment is moved to forbidding (Disable) state.This realization can be avoided in many neighbours situation, occurs that equipment can not respond the situation of change in topology and the traffic forwarding mistake caused in time.
If device A is to B converting flow, receive direction (Rx) fiber break that now B and hub is connected, B port can send and connect (LinkDown) message of makeing mistakes fast, port A, C, D can receive quick LinkDown message, find that neighbours B connects at receive direction to make mistakes, all the port of this equipment is moved to Disable state, send Disable message, start simultaneously and recover detection (Recover Probe) timer, send Recover Probe message, remove all neighbor informations that the port is preserved, although now A, C and D can close port avoid continuing to E-Packet to B, but A and C simultaneously, also cannot continue between D to send message, and this state can last till A, C, again notice (Advertisement) state is moved to by sending Recover Probe message between D, A, C, till D reopens port, in this case A can be caused, C, the interruption for some time of converting flow between D three, reduce the reliability of many neighbours networking situation lower network traffic forwarding.In fact the link now in network between A, C, D is all normal, between three from physical link, possesses normal transmission and receives the possibility of message.
Summary of the invention
The embodiment of the present invention provides a kind of, and when can there is one way link in many neighbours networking, between the port maintaining other normal link, traffic forwarding does not interrupt, and improves the reliability that many neighbours networking situation down-off forwards.
On the one hand, provide a kind of network communication method, described method comprises:
Receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
According to connection error message, determine that this equipment exists and be different from the second neighbouring device of described first neighbouring device, the port of this equipment be set to postpone disabled status and start the delay forbidding timer of preset time period;
Before described delay forbidding timer expiry, determine the notification packet receiving described second neighbouring device transmission;
According to the notification packet receiving described second equipment transmission, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
On the other hand, provide a kind of network communication equipment, described equipment comprises:
Receiving element, for receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
Processing unit, for according to connection error message, determines that described equipment exists and is different from the second neighbouring device of described first neighbouring device, is set to by the port of described equipment postpone disabled status and starts the delay forbidding timer of preset time period;
Wherein said receiving element is also for receiving the notification packet that described second equipment sends, and described processing unit receives the notification packet of described second equipment transmission according to described receiving element, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
On the other hand, propose a kind of network communicating system, described network communicating system comprises:
Be connected to the first network communication equipment adjacent one another are on shared hub and second network communication equipment, wherein
Described first network communication equipment for receive second network equipment send connection error message, wherein said connection error message carry represent described second network communication equipment port in the information of receive direction generation connection error;
Described first network communication equipment is according to connection error message, determine to exist in described system to be different from the 3rd network communication equipment of described second network communication equipment, the port of described first network communication equipment be set to postpone disabled status and start the delay forbidding timer of preset time period;
Described first network communication equipment is also for receiving the notification packet that described 3rd network communication equipment sends, and described first network communication equipment is used for the notification packet receiving described 3rd network communication equipment transmission described in basis, stop described delay to forbid timer, the port of described first network communication equipment is arranged to advertised states.
When the embodiment of the present invention can be implemented in, in many neighbours networking, one way link occurs, traffic forwarding between other neighbours is kept not interrupt, thus improve the service efficiency of many neighbours ad-hoc network, improve the reliability that in many neighbours ad-hoc network, network traffics forward.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of embodiment of the present invention application scenarios;
Fig. 2 is the schematic flow diagram of the network communication method of the embodiment of the present invention;
Fig. 3 is the schematic configuration diagram of the network communication equipment of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the network communication method application scenarios schematic diagram of the embodiment of the present invention.As mentioned above, Fig. 1 is the classical group web frame of many neighbours, and the port A of device A is connected by port B, the port C of equipment C of Hub and equipment B, the port D of equipment D, and each equipment all supports DLDP, line is common netting twine or optical fiber, and the port be connected on Hub all needs to enable DLDP.The application scenario of the embodiment of the present invention can be device A to equipment B converting flow time, the situation of receive direction (Rx) fiber break that equipment B is connected with Hub.In embodiments of the present invention, device A, B, C and D can be the equipment such as the switch of various support DLDP or router, the type of the embodiment of the present invention not limiting device A, B, C and D.
Fig. 2 is the flow chart of the network communication method 200 according to the embodiment of the present invention.As shown in Figure 2, method 200 comprises:
210: receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
220: according to connection error message, determine that this equipment exists and be different from the second neighbouring device of described first neighbouring device, the port of this equipment be set to postpone disabled status and start the delay forbidding timer of preset time period;
230: before described delay forbidding timer expiry, determine the notification packet receiving described second neighbouring device transmission;
240: according to the notification packet receiving described second equipment transmission, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
Below in conjunction with Fig. 1, illustrate the example implementation process of the network communication method 200 of the embodiment of the present invention.
For step 210, such as, the RX optical fiber of port disconnects residing for the equipment B, equipment B detects that ports physical is made mistakes (DOWN), send quick LinkDown message, such as device A receives the quick LinkDown message that equipment B sends, the neighbor information of port residing for sweep equipment B.Equipment B can think the first neighbouring device in step 210.
According to step 220, device A is according to this LinkDown, determine that device A exists at least one other neighbouring device being different from equipment B, such as equipment C, D, then the port of itself is set to postpone forbidding (Disable Delay) state by device A, and starts Disable Delay timer.The time cycle of this DisableDelay timer can be arranged as required, such as, be set to 4 seconds.Here it is noted that under Disable Delay state, the reception of device A and transmitted traffic keep not interrupting, and A can receive and send Advertisement message simultaneously.
Because device A, link between C, D all keep normal connection, so within the time cycle of described Disable Delay timer, notice (Advertisement) message that equipment C, D send can be received.
According to step 230, before described Disable Delay timer expiry, device A is determined to receive such as from the notification packet of equipment C and/or equipment D, then according to step 240, device A is according to the Advertisement message received from equipment C and/or equipment D, stop described Disable Delay timer, and the port of device A self is set to Advertisement state.
It will be understood by those skilled in the art that in the case of the embodiment of the invention, device A, B, C, D are relative to each other in par.Therefore, when one way link occurs in RX direction equipment B, equipment C, D can experience the stateful switchover process identical with device A.Finally, when one way link occurs in RX direction equipment B, interrupting does not appear in the flow can keep device A, mutually forwarding between C, D.
According to the embodiment of the present invention, at described Disable Delay timer expiry, and when device A does not receive the Advertisement message of C or equipment D transmission, the port of himself is set to Disable state by device A.
In this case, for equipment C, D, the flow forwarded between equipment C, D is still likely kept not interrupt.Such as, at equipment C, himself port is set to Disable Delay state, and after starting Disable Delay timer, if equipment C receives the Advertisement message that equipment D sends before this Disable Delay timer expiry, then himself port is set to Advertisement state by equipment C.And equipment D also experiences the stateful switchover process identical with equipment C, the converting flow between equipment C, D is kept not interrupt thus.
According to the embodiment of the present invention, when device A determines to there is not equipment C, D, namely only have device A, B is when being linked on hub, then the port of itself is directly set to Disable state by device A.
It will be understood by those skilled in the art that after the port status of device A, C or D is set to Disable state, Disable message will be sent separately, then open Recover Probe timer, send Recover Probe message, remove neighbor information.
According to the embodiment of the present invention, can be implemented in when there is one way link in many neighbours networking, keep traffic forwarding between other neighbours not interrupt, thus improve the service efficiency of many neighbours ad-hoc network, improve the reliability that in many neighbours ad-hoc network, network traffics forward.
According to the embodiment of the present invention, propose the network communication equipment for realizing above-mentioned network communication method.As shown in Figure 3, network communication equipment 300 can comprise:
Receiving element 310, for receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
Processing unit 320, for according to connection error message, determines that described equipment exists and is different from the second neighbouring device of described first neighbouring device, is set to by the port of described equipment postpone disabled status and starts the delay forbidding timer of preset time period;
Wherein said receiving element 310 is also for receiving the notification packet that described second equipment sends, and described processing unit 320 receives the notification packet of described second equipment transmission according to described receiving element, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
Example in composition graphs 1, can think that described network communication equipment 300 is used as device A wherein, and send connection error message as the equipment B of the first neighbouring device, equipment C and/or equipment D can be used as the second above-mentioned neighbouring device.Similar to the above, can there is at least one in the second neighbouring device.
As mentioned above, the network communication equipment 300 of the embodiment of the present invention can comprise switch and the router device of various support DLDP.The type of the embodiment of the present invention not limiting network communication equipment 300.
According to the embodiment of the present invention, the port of described equipment also for forbidding timer expiry in described delay, and when described receiving element 310 does not receive the notification packet of described second neighbouring device transmission, is set to disabled status by described processing unit 320.
According to the embodiment of the present invention, the port of described equipment also for when determining that this equipment does not exist the second neighbouring device being different from described first neighbouring device, is directly set to disabled status by described processing unit 320.
According to the embodiment of the present invention, also proposed a kind of network communicating system, this system comprises:
Be connected to the first network communication equipment adjacent one another are on shared hub and second network communication equipment, wherein
Described first network communication equipment for receive second network equipment send connection error message, wherein said connection error message carry represent described second network communication equipment port in the information of receive direction generation connection error;
Described first network communication equipment is according to connection error message, determine to exist in described system to be different from the 3rd network communication equipment of described second network communication equipment, the port of described first network communication equipment be set to postpone disabled status and start the delay forbidding timer of preset time period;
Described first network communication equipment is also for receiving the notification packet that described 3rd network communication equipment sends, and described first network communication equipment is used for the notification packet receiving described 3rd network communication equipment transmission described in basis, stop described delay to forbid timer, the port of described first network communication equipment is arranged to advertised states.
According to the embodiment of the present invention, described first network communication equipment is also for forbidding timer expiry in described delay, and described receiving element do not receive described second network communication equipment send notification packet when, the port of described equipment is set to disabled status.
According to the embodiment of the present invention, described first network communication equipment also for when determine not exist adjacent with described first network communication equipment be different from the 3rd network communication equipment of described second network communication equipment, directly the port of described first network communication equipment is set to disabled status.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (11)
1. a network communication method, is characterized in that, described method comprises:
Receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
According to connection error message, determine that this equipment exists the second neighbouring device being different from described first neighbouring device, the port of this equipment be set to postpone disabled status and start the delay forbidding timer of preset time period, and deleting the neighbor information of port residing for described first neighbouring device;
Before described delay forbidding timer expiry, determine the notification packet receiving described second neighbouring device transmission;
According to the notification packet receiving described second neighbouring device transmission, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
2. the method for claim 1, is characterized in that, described method also comprises:
At described delay forbidding timer expiry, and when not receiving the notification packet of described second neighbouring device transmission, the port of described equipment is set to disabled status.
3. method as claimed in claim 1 or 2, is characterized in that,
There is at least one in described second neighbouring device.
4. the method for claim 1, is characterized in that, described method also comprises:
When determining that this equipment does not exist the second neighbouring device being different from described first neighbouring device, directly the port of described equipment is set to disabled status.
5. a network communication equipment, is characterized in that, described equipment comprises:
Receiving element, for receive first neighbouring device send connection error message, wherein said connection error message carry represent described first neighbouring device port in the information of receive direction generation connection error;
Processing unit, for according to connection error message, determine that described equipment exists the second neighbouring device being different from described first neighbouring device, the port of described equipment be set to postpone disabled status and start the delay forbidding timer of preset time period, and deleting the neighbor information of port residing for described first neighbouring device;
Wherein said receiving element is also for receiving the notification packet that described second neighbouring device sends, and described processing unit receives the notification packet of described second neighbouring device transmission according to described receiving element, stop described delay to forbid timer, the port of described equipment is arranged to advertised states.
6. equipment as claimed in claim 5, is characterized in that,
The port of described equipment also for forbidding timer expiry in described delay, and when described receiving element does not receive the notification packet of described second neighbouring device transmission, is set to disabled status by described processing unit.
7. the equipment as described in claim 5 or 6, is characterized in that,
There is at least one in described second neighbouring device.
8. equipment as claimed in claim 5, is characterized in that,
The port of described equipment also for when determining that this equipment does not exist the second neighbouring device being different from described first neighbouring device, is directly set to disabled status by described processing unit.
9. a network communicating system, is characterized in that, described network communicating system comprises:
Be connected to the first network communication equipment adjacent one another are on shared hub and second network communication equipment, wherein
Described first network communication equipment for receive second network communication equipment send connection error message, wherein said connection error message carry represent described second network communication equipment port in the information of receive direction generation connection error;
Described first network communication equipment is according to connection error message, determine in described system, to there is the 3rd network communication equipment being different from described second network communication equipment, the port of described first network communication equipment be set to postpone disabled status and start the delay forbidding timer of preset time period, and deleting the neighbor information of port residing for described second network communication equipment;
Described first network communication equipment is also for receiving the notification packet that described 3rd network communication equipment sends, and described first network communication equipment is used for the notification packet receiving described 3rd network communication equipment transmission described in basis, stop described delay to forbid timer, the port of described first network communication equipment is arranged to advertised states.
10. network communicating system as claimed in claim 9, is characterized in that,
Described first network communication equipment is also for forbidding timer expiry in described delay, and described receiving element do not receive described second network communication equipment send notification packet when, the port of described first network communication equipment is set to disabled status.
11. network communicating systems as claimed in claim 9, is characterized in that,
Described first network communication equipment also for when determine not exist adjacent with described first network communication equipment be different from the 3rd network communication equipment of described second network communication equipment, directly the port of described first network communication equipment is set to disabled status.
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| CN201210013861.4A CN102571589B (en) | 2012-01-17 | 2012-01-17 | Network communications method, equipment and system |
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| CN201210013861.4A CN102571589B (en) | 2012-01-17 | 2012-01-17 | Network communications method, equipment and system |
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| CN101056341A (en) * | 2007-06-07 | 2007-10-17 | 杭州华三通信技术有限公司 | Automatic closing method and automatic recovery method of unidirectional link and its device |
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