CN102082695A - Hot standby redundancy network system and redundancy realization method - Google Patents
Hot standby redundancy network system and redundancy realization method Download PDFInfo
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Abstract
The embodiment of the invention discloses a hot standby redundancy network system and a redundancy realization method, which can be suitable for real-time Ethernet. The hot standby redundancy network system comprises at least two network nodes and redundancy nodes which are in one-to-one correspondence with the network nodes, wherein each network node and each redundancy node both comprise four network interfaces and one exchange interface, the four network interface are all provided with the same physical address and logic address, the four network interfaces make up two pairwise redundancy interface in pairs, the network nodes are connected with the corresponding redundancy nodes through the exchange interfaces to make up redundancy node pairs, and the network nodes of the adjacent redundancy node pairs are in cross connection with the redundancy nodes though the network interfaces. With the scheme, the failure rate of the real-time Ethernet is insensitive to the increase of the number of the network nodes, the data message format of the real-time Ethernet does not need to be modified, the failure rate of the real-time Etherent can be obviously reduced, and the redundant degree and the usability of the real-time Etherent can be greatly increased.
Description
Technical field:
The present invention relates to Ethernet communication technology field, relate in particular to a kind of hot backup redundancy network system and redundant implementation method thereof applicable to real-time ethernet.
Background technology:
Ethernet is the most general communication protocol standard that existing now local area network (LAN) adopts.Along with development of Ethernet technology, ethernet communication in the application of industrial circle also more and more widely, the availability that industrial stable operation and benefit improve for real-time ethernet has proposed more and more higher requirement, so the high availability of real-time ethernet also more and more comes into one's own.
At the high availability requirement of real-time ethernet, what generally adopt at present is the interface redundancy mechanism of single loop network and the node redundancy mechanism of double loop network.But can only allow one end line cable to break down in single loop network, when having extra fault to take place again, the network service fault promptly takes place in then whole network.And double loop network can allow a looped network that the many places fault takes place, but (as two loops two place's link failures takes place simultaneously) when two looped networks break down simultaneously, then will cause the communication failure of whole redundant network.No matter be monocycle redundancy or dual loop redundancy, along with the increase of system node number, the failure rate of network all can sharply increase, so in the prior art, adopt the redundancy and the reliability of real-time ethernet of above-mentioned communication mechanism all lower, be difficult to satisfy preferably the requirement that industrial circle is used.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of hot backup redundancy network system and redundant implementation method thereof applicable to real-time ethernet, to reduce the failure rate of real-time ethernet, improve its redundancy and availability.
For this reason, the embodiment of the invention provides following technical scheme:
A kind of hot backup redundancy network system comprises:
Be no less than two network node and with the unique corresponding redundant node of each network node;
Each network node and each redundant node include four network interfaces and a Fabric Interface, and four network interfaces all have identical physical address and logical address, wherein to form first redundant interface right for first network interface and second network interface, and it is right that the 3rd network interface and the 4th network interface form second redundant interface;
Connect by described Fabric Interface between each network node and its corresponding redundant node, it is right to form a redundant node, and the physical address and the logical address of each redundant node centering redundant node, all physical address and the logical address with this redundant node centering network node is identical;
Each redundant node centering, first network interface of network node is connected to the 3rd network interface of the redundant node centering network node of its adjacent side, and second network interface is connected to the 3rd network interface of the redundant node centering redundant node of an above-mentioned adjacent side; First network interface of redundant node is connected to the 4th network interface of the redundant node centering network node of an above-mentioned adjacent side, and second network interface is connected to the 4th network interface of the redundant node centering redundant node of an above-mentioned adjacent side;
A plurality of redundant nodes constitute the linear triangulation network grating texture to being connected successively in the manner described above.
Preferably, in the described hot backup redundancy network system, first network interface of last redundant node centering network node is connected to the 3rd network interface of first redundant node centering network node, and second network interface is connected to the 3rd network interface of first redundant node centering redundant node;
First network interface of last redundant node centering redundant node is connected to the 4th network interface of first redundant node centering network node, and second network interface is connected to the 4th network interface of first redundant node centering redundant node;
Redundant node between to being connected in the manner described above, form annular network structure.
Preferably, two adjacent redundant nodes between, the length of four cables that connects each network interface is identical in machining accuracy.
Preferably, each redundant node centering has and only has a node in running order, and another node is in stand-by state;
Two pairs of redundant interfaces of in running order node send message, reception message and E-Packet being used to;
Two pairs of redundant interfaces that are in the stand-by state node are to being used to receive message;
Node in running order or stand-by state is used to handle message, and its interactive interface is used to receive message and sends message.
The present invention also provides a kind of redundant implementation method, is applied to comprise in the above-mentioned hot backup redundancy network system:
Network node that redundant node is right and redundant node thereof are when powering on each other, and competition becomes working node, and one of them node becomes in running order working node, and another node becomes the secondary node that is in stand-by state;
Working node by its four network interfaces to adjacent redundant node to sending redundant message;
A network interface of a pair of redundant interface centering of working node receives after the message, judges whether this message needs to transmit, if, then by another of this node to redundant interface to transmitting this message;
Secondary node is not transmitted this message when receiving message.
Preferably, described redundant implementation method also comprises:
Working node and secondary node are monitored mutual malfunction by interactive interface, when the fault level of working node during greater than the fault level of secondary node, the triggering state switches, and former working node switches to stand-by state, and former secondary node switches to operating state simultaneously.
Preferably, secondary node periodically sends the fault level assert packet to working node by interactive interface;
Working node is resolved described fault level assert packet, and compares with self fault level, if the fault level height of self, then by interactive interface to secondary node transmit status switching command message;
Secondary node switches to operating state after receiving the state switch command message, simultaneously by interactive interface to working node transmit status switching command confirmation message;
Working node switches to stand-by state after receiving the state switch command confirmation message, and completion status is switched.
Preferably, described redundant implementation method also comprises:
Working node by send the fault alarm message with the Trouble Report of working node and secondary node to malfunction monitoring equipment;
Working node detects interactive interface and whether has communication failure, if, then to this communication failure of malfunction monitoring device report.
Preferably, described redundant implementation method also comprises:
In the hot backup redundancy network system each redundant node between adopt the communication of master-slave mode mechanism;
It is right to being main redundant node to preestablish certain redundant node, and all the other redundant nodes are to being right from redundant node;
The working node of main redundant node centering sends to the working node from redundant node centering and allows to send message commands, to control the message sending order that all redundant nodes are right in this system.
Preferably, described redundant implementation method also comprises:
In the hot backup redundancy network system each redundant node between adopt the communication of timesharing mechanism;
The right transmitting time groove of each redundant node of configuration in advance, the transmitting time groove that each redundant node is right is not overlapping, the network node of a redundant node centering has identical transmitting time groove with redundant node, and working node sends message in its time corresponding groove.
Preferably, before the right transmitting time groove of each redundant node of configuration, also comprise:
Each node of all redundant node centerings is carried out clock synchronization according to clock synchronization protocol.
Preferably, described clock synchronization protocol is the IEEE1588 clock synchronization protocol.
Preferably, a working node of setting in the hot backup redundancy network system is in the master clock state, as the clock source of other nodes in this system;
Other all nodes in this system are all synchronous with this master clock, and wherein redundant node is finished clock synchronization by the interactive interface working node redundant with it.
Preferably, when described hot backup redundancy network system is annular network structure, specify one of them redundant node to for right in advance by node;
Described working node by node centering is not transmitted the message that receives.
Preferably, the described contact that ends is to sending redundant node to self for message, and promptly working node is not transmitted the message that this node self sends.
Preferably, described redundant implementation method also comprises:
When described hot backup redundancy network system is annular network structure, when one group of adjacent redundant node between four passages connecting all can't proper communication the time, recover the described node that ends to being normal operating conditions, i.e. the normal message that receives of transmitting of its working node;
Described hot backup redundancy network system is the line style fenestral fabric by the netted Structure Conversion of annular.
Compared with prior art, technique scheme has the following advantages:
The technical scheme that the embodiment of the invention provided, the equal correspondence of each network node is provided with redundant node, include redundant each other a plurality of network interfaces in each network node and the redundant node, and it is right that network interface is divided into two redundant interfaces, connect four nodes of both direction in the network respectively, realized multiple redundancy mechanism.When described hot backup redundancy network system is the line style fenestral fabric, if two right nodes of a pair of redundant node do not break down simultaneously or adjacent redundant node between four links do not break down simultaneously, this network still can normally move; When described hot backup redundancy network system is annular network structure, two nodes right when a pair of redundant node do not break down simultaneously, even adjacent redundant node between four links break down simultaneously, this annular network structure can also switch to the line style fenestral fabric, still can guarantee the normal operation of network.In the n latticed hot backup redundancy system right, can allow n network node to break down at most and do not influence the normal operation of network or allow 3n bar link occurs fault at most and do not influence network and normally move redundant node.
The failure rate of network is insensitive to the increase of number of network node purpose simultaneously, can be as failure rate increases sharply along with the increase of number of network node purpose in the redundant network system of other structures.
When this hot backup redundancy network system is applied to real-time ethernet, need not real-time ethernet data message form is made any modification, can significantly reduce the failure rate of real-time ethernet, its redundancy and availability are improved greatly, satisfy the requirement that industrial circle is used preferably.
In addition, same network node had both gone for having in the latticed hot backup redundancy system of node redundancy, also went for only having in the real-time redundant system of double nip of interface redundancy.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The hot backup redundancy network system schematic diagram of the linear triangulation network grating texture that Fig. 1 provides for embodiment one;
The annular cancellated hot backup redundancy network system schematic diagram that Fig. 2 provides for embodiment one;
The network model schematic diagram of the node that Fig. 3 provides for embodiment one;
The working node that Fig. 4 provides for embodiment two and a kind of schematic flow sheet of secondary node switch operating state;
The node workflow schematic diagram that Fig. 5 provides for embodiment two;
The path schematic diagram of message transmissions in the hot backup redundancy network system that Fig. 6 provides for embodiment two;
The network topology structure schematic diagram of the real-time redundant network of the full annular double nip system that Fig. 7 provides for embodiment two.
Embodiment
In order to reduce the failure rate of real-time ethernet, improve its redundancy and availability, the embodiment of the invention provides a kind of hot backup redundancy network system and redundant implementation method thereof applicable to real-time ethernet, and described hot backup redundancy network system comprises: be no less than two network nodes and with the unique corresponding redundant node of each network node; Each network node and each redundant node include four network interfaces and a Fabric Interface, and four network interfaces all have identical physical address and logical address, wherein to form first redundant interface right for first network interface and second network interface, and it is right that the 3rd network interface and the 4th network interface form second redundant interface; Connect by described Fabric Interface between each network node and its corresponding redundant node, it is right to form a redundant node, and the physical address and the logical address of each redundant node centering redundant node, all physical address and the logical address with this redundant node centering network node is identical; Each redundant node centering, first network interface of network node is connected to the 3rd network interface of the redundant node centering network node of its adjacent side, and second network interface is connected to the 3rd network interface of the redundant node centering redundant node of an above-mentioned adjacent side; First network interface of redundant node is connected to the 4th network interface of the redundant node centering network node of an above-mentioned adjacent side, and second network interface is connected to the 4th network interface of the redundant node centering redundant node of an above-mentioned adjacent side; A plurality of redundant nodes constitute the linear triangulation network grating texture to being connected successively in the manner described above.
In addition, in the described hot backup redundancy network system, redundant node between can also be connected in the following manner, form annular network structure:
First network interface of last redundant node centering network node is connected to the 3rd network interface of first redundant node centering network node, and second network interface is connected to the 3rd network interface of first redundant node centering redundant node;
First network interface of last redundant node centering redundant node is connected to the 4th network interface of first redundant node centering network node, and second network interface is connected to the 4th network interface of first redundant node centering redundant node.
It more than is the application's core concept, below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization under the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
Embodiment one:
The embodiment of the invention provides a kind of hot backup redundancy network system, can preferably be applicable to the network system of being made up of the real-time ethernet technology, reduces the failure rate of real-time ethernet, improves its redundancy and availability.As shown in Figure 1, be a kind of structural representation of this system, it comprises:
Two network interfaces of a redundant interface centering of network node 10 are connected respectively to the network node and the redundant node of its adjacent redundant node centering, and two network interfaces of another redundant interface centering are connected respectively to the network node and the redundant node of its another adjacent redundant node centering.Connected mode and network node that redundant node 20 and other redundant node are right are identical.Concrete, as shown in Figure 1, the 3rd network interface 303, the second network interfaces 102 that first network interface 101 of network node 10 is connected to the redundant node centering network node 30 of its adjacent side are connected to the 3rd network interface 403 of the redundant node centering redundant node 40 of an above-mentioned adjacent side; The 4th network interface 304, the second network interfaces 202 that first network interface 201 of redundant node 20 is connected to the redundant node centering network node 30 of an above-mentioned adjacent side are connected to the 4th network interface 404 of the redundant node centering redundant node 40 of an above-mentioned adjacent side;
The structure of other network node and redundant node is all identical with redundant node 20 with network node 10 in this system, and it is right to form corresponding redundant node, does not repeat them here.When this system only comprise two redundant nodes to the time, above-mentioned connected mode constitutes the linear triangulation network grating texture.When comprise unnecessary two redundant nodes to the time, a plurality of redundant nodes are to being connected successively in the manner described above, specifically can be referring to as shown in Figure 1, first network interface, 501, the four network interfaces 104 that the 3rd network interface 103 of network node 10 is connected to the redundant node centering network node 50 of its adjacent opposite side are connected to first network interface 601 of the redundant node centering redundant node 60 of above-mentioned adjacent opposite side; The 3rd network interface 201 of redundant node 20 is connected to second network interface 502 of the redundant node centering network node 50 of above-mentioned adjacent opposite side, the 4th network interface 204 is connected to second network interface 602 of the redundant node centering redundant node 60 of an above-mentioned adjacent side, and a plurality of redundant nodes are to being connected to form the linear triangulation network grating texture in the manner described above successively.
In the above-mentioned hot backup redundancy network system, to regarding an equipment as, then whole network can be regarded oriented linear network topology as each redundant node, so whole hot backup redundancy network system is a linear oriented crossover network redundant system.When being necessary, can also form the crossover network redundant system of annular the redundant node at the initial and end two ends in the linear oriented crossing redundancy network system to interconnection.
As shown in Figure 2, be the cancellated hot backup redundancy network system of annular, its concrete connected mode is as follows: first network interface of last redundant node centering network node is connected to the 3rd network interface of first redundant node centering network node, and second network interface is connected to the 3rd network interface of first redundant node centering redundant node; First network interface of last redundant node centering redundant node is connected to the 4th network interface of first redundant node centering network node, and second network interface is connected to the 4th network interface of first redundant node centering redundant node; Redundant node between to being connected in the manner described above, form annular network structure.
As shown in Figure 3, the network model figure for each node specifically comprises, physical layer (PHY), link redundancy management entity layer (LRE), Media Independent Interface (MII), data link layer, real time ethernet protocol layer and application layer.Wherein the link redundancy management entity is between physical layer and data link layer, the redundant message that processing produces because of circuit redundancy (annular), and the existence that the data link layer is hidden redundant link, and the real time ethernet protocol layer have precision clock synchronously, accurate real-time ethernet technology such as dispatching message.
In the above-mentioned hot backup redundancy network system, two adjacent arbitrarily redundant nodes are to all being connected by four communication ports that cross one another, in order to guarantee the synchronism of transfer of data, four cables that carry above-mentioned four communication ports guarantee that the machining accuracy planted agent length is identical.
In the hot backup redundancy network system that present embodiment provides, realized both existing the redundancy of communication node, the multiple redundancy mechanism that has intranodal network interface redundancy again can significantly reduce the failure rate of network, and the redundancy of network and availability are improved greatly.
In the above-mentioned hot backup redundancy network system, all there are two kinds of operating states in each grid node and redundant node, and each redundant node centering has and only have a node in running order, are working node; Another node is in stand-by state, is secondary node; Two pairs of redundant interfaces of working node send message, reception message and E-Packet being used to; Two pairs of redundant interfaces of secondary node are to only being used to receive message; Working node and secondary node all can be used for handling message, and its interactive interface is used to receive message and sends message.
The hot backup redundancy network system that present embodiment provides goes for the network system of being made up of ethernet technology or other cable network technology.
In the hot backup redundancy network system that present embodiment provides, the equal correspondence of each network node is provided with redundant node, include redundant each other a plurality of network interfaces in each network node and the redundant node, and it is right that network interface is divided into two redundant interfaces, connect four nodes of both direction in the network respectively, realized multiple redundancy mechanism.When described hot backup redundancy network system is the line style fenestral fabric, if two right nodes of a pair of redundant node do not break down simultaneously or adjacent redundant node between four links do not break down simultaneously, this network still can normally move; When described hot backup redundancy network system is annular network structure, two nodes right when a pair of redundant node do not break down simultaneously, even adjacent redundant node between four links break down simultaneously, this annular network structure can also switch to the line style fenestral fabric, still can guarantee the normal operation of network.In the n latticed hot backup redundancy system right, can allow n network node to break down at most and do not influence the normal operation of network or allow 3n bar link occurs fault at most and do not influence network and normally move redundant node.The failure rate of network is insensitive to the increase of number of network node purpose simultaneously, can be as failure rate increases sharply along with the increase of number of network node purpose in the redundant network system of other structures.Same network node had both gone for having in the latticed hot backup redundancy system of node redundancy, also went for only having in the real-time redundant system of double nip of interface redundancy.When this hot backup redundancy network system is applied to real-time ethernet, need not real-time ethernet data message form is made any modification, can significantly reduce the failure rate of real-time ethernet, its redundancy and availability are improved greatly, satisfy the requirement that industrial circle is used preferably.
Embodiment two:
Corresponding to the hot backup redundancy network system that embodiment provides, present embodiment also provides a kind of redundant implementation method that is applicable to this system, to reduce the failure rate of real-time ethernet, improves its redundancy and availability.This redundancy implementation method comprises:
Preestablish in running order working node of each redundant node centering and the secondary node that is in stand-by state; Wherein working node can be specified according to the state of node in advance by user or system, can also when powering on, compete generation by redundant node is right each other network node and redundant node thereof, for example redundant node centering node is in running order, and then another node of this node centering will be in stand-by state when powering on.
Carry out message when sending at needs, a working node in this system by its four network interfaces to adjacent redundant node to sending redundant message;
The network interface of a pair of redundant interface centering of the arbitrary working node in the system receives after the message, judges whether this message needs to transmit, if then by another of this node two right network interfaces of redundant interface are transmitted this message; Arbitrary secondary node is not all transmitted this message in the system when receiving message.
In the said method, working node and secondary node can also be according to its failure condition switch operating states.Concrete, working node and secondary node are monitored mutual malfunction by interactive interface, and when the fault level of working node during greater than the fault level of secondary node, the triggering state switches, former working node switches to stand-by state, and former secondary node switches to operating state simultaneously.
As shown in Figure 4, can be for working node and secondary node according to a kind of schematic flow sheet of its failure condition switch operating state, it may further comprise the steps:
Step S401, secondary node periodically sends the fault level assert packet to working node by interactive interface;
Step S402, working node receives and resolves described fault level assert packet;
Step S403, working node judge whether the fault level of self is higher than the fault level of secondary node, if, execution in step S404 then, otherwise, keep working node and secondary node state constant.
Step S404, working node by interactive interface to secondary node transmit status switching command message;
Step S405, secondary node switch to operating state after receiving the state switch command message, simultaneously by interactive interface to working node transmit status switching command confirmation message;
Step S406 behind the working node accepting state switching command confirmation message, switches to stand-by state, and completion status is switched.
By the operating state changing method of above-mentioned node, the node that fault level is lower becomes working node, can significantly reduce the failure rate of whole network system.Simultaneously, for the ease of the location with fix a breakdown, working node can also by send the fault alarm message with the Trouble Report of working node and secondary node to malfunction monitoring equipment.For fear of carrying out information exchange between working node and the secondary node, can also be real-time or periodically detect interactive interface and whether have communication failure, if then working node is to the communication failure of this interactive interface of malfunction monitoring device report.
When operate as normal, all can only there be a working node on network, to send data at any time in the above-mentioned hot backup redundancy network system; Can not send message simultaneously between the different working nodes.Timesharing sends the multiple scheme realization that message can take to comprise master/slave scheduling, timesharing scheduling between the working node.
When each redundant node in the hot backup redundancy network system between when adopting the communication of master-slave mode mechanism, it is right to being main redundant node to preestablish some redundant nodes, all the other redundant nodes are to being right from redundant node; Have only the working node of main redundant node centering can initiatively send message; The working node of main redundant node centering sends to the working node from redundant node centering and allows to send message commands, to control the message sending order that all redundant nodes are right in this system.
When each redundant node in the hot backup redundancy network system between when adopting the communication of timesharing mechanism, need the right transmitting time groove of each redundant node of configuration in advance, the transmitting time groove that each redundant node is right is not overlapping, the network node of a redundant node centering has identical transmitting time groove with redundant node, and working node can only send message in its time corresponding groove.Wherein, the distribution of time slot can be disposed as required by user oneself, also can be distributed automatically by management equipment when device power.
Simultaneously, if adopt the communication of timesharing mechanism,, each node of all redundant node centerings can also be carried out clock synchronization according to clock synchronization protocol in order to guarantee the clock synchronization between each node; Described clock synchronization protocol can be IEEE1588 clock synchronization protocol or other synchronous protocol.
Clock synchronization mode between each concrete node can for: a working node of setting in the hot backup redundancy network system is in the master clock state, as the clock source of other nodes in this system; Other all working nodes all as this clock source from clock, all are all synchronous with this master clock from clock in this system.Because the redundant interface of secondary node is not to having the ability that sends message, secondary node is finished clock synchronization by the interactive interface working node redundant with it, thereby realizes the clock synchronization of whole network.
Owing to the quantity of node in the above-mentioned hot backup redundancy network system can be adjusted according to demand in real time, therefore, when inserting new node, at first itself and master clock to be carried out time synchronized in addition; After the success, the new working node that inserts could send corresponding message in the time slot that self is assigned to synchronously.
In the above-mentioned hot backup redundancy network system, when it was the line style fenestral fabric, the working node that its last redundant node is right was not transmitted any message, and promptly any message forwarding is ended at the end of its linear structure.
When described hot backup redundancy network system is annular network structure,, can specify one of them redundant node in advance to right for ending node for stoping the generation of network storm; Described working node by node centering is not transmitted any message that receives.Any message is ending locating by node, and the unlimited forwarding of having avoided message can stop the generation of network storm, avoids network congestion.
The above-mentioned node that ends can also be taken on self by the redundant node that sends this message being specified according to demand by system or user, and promptly working node is not transmitted the message that this node self sends.
Above-mentioned being provided with in the right hot backup redundancy network system of node, when one group of adjacent redundant node between four passages connecting all can't proper communication the time, can recover the described node that ends to being normal operating conditions, i.e. the normal message that receives of transmitting of its working node.By aforesaid operations, described hot backup redundancy network system is the line style fenestral fabric by the netted Structure Conversion of annular.
In the above-mentioned hot backup redundancy network system, then adopt redundant the transmission.Two nodes of each redundant node centering have identical physical address and logical address, and when message adopted clean culture to send, then two nodes that the purpose redundant node is right can both receive corresponding message; And message is when adopting multicast to send, and two the right nodes of redundant node that receive message then obtain the data of same section in the message according to a preconcerted arrangement, and therefore in the hot backup redundancy network system, two nodes of redundant node centering can redundant receiving data information.
As shown in Figure 5, present embodiment provides a kind of workflow schematic diagram of the arbitrary node of hot backup redundancy network system, and it may further comprise the steps:
Step S501, a network interface of a redundant node centering of node receives message;
Step S502 judges whether to need to transmit this message, if, carry out next step, otherwise, no longer transmit this message, process ends.Wherein, can comprise in this step: judge whether this node is the node that ends node centering, if, then need not to transmit this message, otherwise, need to transmit this message.
Step S503 judges whether this node is in running order, if, carry out next step, otherwise, no longer transmit this message, process ends.
Step S504, node another redundant node by this node is to transmitting this message.
As shown in Figure 6, a kind of path schematic diagram of message transmissions in a kind of hot backup redundancy network system that provides for present embodiment.
In addition, require when low slightly in network redundancy, the node of forming this hot backup redundancy network system also goes for not having node redundancy and only has the linear or annular real-time redundant network of the double nip of an interface redundancy system.In the real-time redundant network of double nip system, between the adjacent network node by a pair of redundant interface to being connected, realized the redundancy of interface and circuit in the network, and in the transmission and the processing to redundant message of message, the node in the task of the required execution of each node and the latticed hot backup redundancy network system is identical.As shown in Figure 7, be the network topology of the real-time redundant network of full annular double nip system.
In the redundant implementation method that present embodiment provides, working node sends simultaneously or receives and E-Packet by the redundant interface of redundant interface centering, can realize multiple redundancy mechanism in conjunction with redundant secondary node.When described hot backup redundancy network system is the line style fenestral fabric, if two right nodes of a pair of redundant node do not break down simultaneously or adjacent redundant node between four links do not break down simultaneously, this network still can normally move; When described hot backup redundancy network system is annular network structure, two nodes right when a pair of redundant node do not break down simultaneously, even adjacent redundant node between four links break down simultaneously, this annular network structure can also switch to the line style fenestral fabric, still can guarantee the normal operation of network.The failure rate of network increases insensitive to the number of network node purpose, can be as failure rate increases sharply along with the increase of number of network node purpose in the redundant network system of other structures.This method is when a hot backup redundancy network system that provides is applied to real-time ethernet in conjunction with the embodiments, need not real-time ethernet data message form is made any modification, can significantly reduce the failure rate of real-time ethernet, its redundancy and availability are improved greatly, satisfy the requirement that industrial circle is used preferably.
Various piece adopts the mode of going forward one by one to describe in this specification, and what each part stressed all is and the difference of other parts that identical similar part is mutually referring to getting final product between the various piece.To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to embodiment illustrated herein, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (16)
1. a hot backup redundancy network system is characterized in that, comprising:
Be no less than two network node and with the unique corresponding redundant node of each network node;
Each network node and each redundant node include four network interfaces and a Fabric Interface, and four network interfaces all have identical physical address and logical address, wherein to form first redundant interface right for first network interface and second network interface, and it is right that the 3rd network interface and the 4th network interface form second redundant interface;
Connect by described Fabric Interface between each network node and its corresponding redundant node, it is right to form a redundant node, and the physical address and the logical address of each redundant node centering redundant node, all physical address and the logical address with this redundant node centering network node is identical;
Each redundant node centering, first network interface of network node is connected to the 3rd network interface of the redundant node centering network node of its adjacent side, and second network interface is connected to the 3rd network interface of the redundant node centering redundant node of an above-mentioned adjacent side; First network interface of redundant node is connected to the 4th network interface of the redundant node centering network node of an above-mentioned adjacent side, and second network interface is connected to the 4th network interface of the redundant node centering redundant node of an above-mentioned adjacent side;
A plurality of redundant nodes constitute the linear triangulation network grating texture to being connected successively in the manner described above.
2. hot backup redundancy network system according to claim 1 is characterized in that:
In the described hot backup redundancy network system, first network interface of last redundant node centering network node is connected to the 3rd network interface of first redundant node centering network node, and second network interface is connected to the 3rd network interface of first redundant node centering redundant node;
First network interface of last redundant node centering redundant node is connected to the 4th network interface of first redundant node centering network node, and second network interface is connected to the 4th network interface of first redundant node centering redundant node;
Redundant node between to being connected in the manner described above, form annular network structure.
3. according to claim 1 or 2 each described hot backup redundancy network systems, it is characterized in that:
Two adjacent redundant nodes between, the length of four cables that connects each network interface is identical in machining accuracy.
4. according to claim 1 or 2 each described hot backup redundancy network systems, it is characterized in that:
Each redundant node centering has and only has a node in running order, and another node is in stand-by state;
Two pairs of redundant interfaces of in running order node send message, reception message and E-Packet being used to;
Two pairs of redundant interfaces that are in the stand-by state node are to being used to receive message;
Node in running order or stand-by state is used to handle message, and its interactive interface is used to receive message and sends message.
5. a redundant implementation method is applied to it is characterized in that as in claim 1 or 2 each described hot backup redundancy network systems, comprising:
Network node that redundant node is right and redundant node thereof are when powering on each other, and competition becomes working node, and one of them node becomes in running order working node, and another node becomes the secondary node that is in stand-by state;
Working node by its four network interfaces to adjacent redundant node to sending redundant message;
A network interface of a pair of redundant interface centering of working node receives after the message, judges whether this message needs to transmit, if, then by another of this node to redundant interface to transmitting this message;
Secondary node is not transmitted this message when receiving message.
6. redundant implementation method according to claim 5 is characterized in that, also comprises:
Working node and secondary node are monitored mutual malfunction by interactive interface, when the fault level of working node during greater than the fault level of secondary node, the triggering state switches, and former working node switches to stand-by state, and former secondary node switches to operating state simultaneously.
7. redundant implementation method according to claim 6 is characterized in that:
Secondary node periodically sends the fault level assert packet to working node by interactive interface;
Working node is resolved described fault level assert packet, and compares with self fault level, if the fault level height of self, then by interactive interface to secondary node transmit status switching command message;
Secondary node switches to operating state after receiving the state switch command message, simultaneously by interactive interface to working node transmit status switching command confirmation message;
Working node switches to stand-by state after receiving the state switch command confirmation message, and completion status is switched.
8. redundant implementation method according to claim 7 is characterized in that, also comprises:
Working node by send the fault alarm message with the Trouble Report of working node and secondary node to malfunction monitoring equipment;
Working node detects interactive interface and whether has communication failure, if, then to this communication failure of malfunction monitoring device report.
9. redundant implementation method according to claim 5 is characterized in that, also comprises:
In the hot backup redundancy network system each redundant node between adopt the communication of master-slave mode mechanism;
It is right to being main redundant node to preestablish certain redundant node, and all the other redundant nodes are to being right from redundant node;
The working node of main redundant node centering sends to the working node from redundant node centering and allows to send message commands, to control the message sending order that all redundant nodes are right in this system.
10. redundant implementation method according to claim 5 is characterized in that, also comprises:
In the hot backup redundancy network system each redundant node between adopt the communication of timesharing mechanism;
The right transmitting time groove of each redundant node of configuration in advance, the transmitting time groove that each redundant node is right is not overlapping, the network node of a redundant node centering has identical transmitting time groove with redundant node, and working node sends message in its time corresponding groove.
11. redundant implementation method according to claim 10 is characterized in that, before the right transmitting time groove of each redundant node of configuration, also comprises:
Each node of all redundant node centerings is carried out clock synchronization according to clock synchronization protocol.
12. redundant implementation method according to claim 11 is characterized in that:
Described clock synchronization protocol is the IEEE1588 clock synchronization protocol.
13. redundant implementation method according to claim 11 is characterized in that:
A working node of setting in the hot backup redundancy network system is in the master clock state, as the clock source of other nodes in this system;
Other all nodes in this system are all synchronous with this master clock, and wherein redundant node is finished clock synchronization by the interactive interface working node redundant with it.
14. redundant implementation method according to claim 5 is characterized in that:
When described hot backup redundancy network system is annular network structure, specify one of them redundant node to for right in advance by node;
Described working node by node centering is not transmitted the message that receives.
15. redundant implementation method according to claim 14 is characterized in that:
The described contact that ends is to sending redundant node to self for message, and promptly working node is not transmitted the message that this node self sends.
16. redundant implementation method according to claim 14 is characterized in that, also comprises:
When described hot backup redundancy network system is annular network structure, when one group of adjacent redundant node between four passages connecting all can't proper communication the time, recover the described node that ends to being normal operating conditions, i.e. the normal message that receives of transmitting of its working node;
Described hot backup redundancy network system is the line style fenestral fabric by the netted Structure Conversion of annular.
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| CN102799153A (en) * | 2012-07-13 | 2012-11-28 | 西南交通大学 | Wired and wireless hot-standby redundancy multi-master communication method and field network node module |
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