CN101194473A

CN101194473A - Method and site for achieving link aggregation between the interconnected RPR

Info

Publication number: CN101194473A
Application number: CNA2005800500247A
Authority: CN
Inventors: 程俊
Original assignee: UTStarcom Telecom Co Ltd
Current assignee: UTStarcom Telecom Co Ltd
Priority date: 2005-06-06
Filing date: 2005-06-06
Publication date: 2008-06-04
Anticipated expiration: 2025-06-06
Also published as: WO2006131019A1; CN101194473B

Abstract

A method is provided for achieving link aggregation between the interconnected resilient packet ring (RPR) in the RPR system, and the said interconnection system comprises at least the first RPR and the second RPR, and the said RPR comprises at least two sites crossing the ring. The method comprises the steps: at least two paths crossing the ring are established between the first RPR and the second RPR to transmit the service crossing ring. Wherein a site crossing ring is selected based on the aggregation policy configured to transmit the service crossing ring in the corresponding path crossing ring. The said method and the site of the present invention can automatically transfer the service in this site to the other path crossing ring after certain site or path crossing ring is fail, and wherein the protective time less than 50ms. The service crossing ring has the same CoS in the plurality of RPRs.

Description

Between interconnected RPR, realize the method and the website of link aggregation

Technical field

The present invention relates to Resilient Packet Ring (Resilient Package Ring-RPR) technical field, in particular to being used to be implemented between a plurality of RPR loops method and the transannular website of realizing aggregated links.

Background technology

Resilient Packet Ring is a kind of metropolitan area network technology, this metropolitan area network adopts twin nuclei to transmit data between a plurality of websites, at present by IEEE (The Institute of Electrical andElectronics Engineers-U.S. electric and electronics engineers) 802.17 working groups standardization.The key characteristic of Resilient Packet Ring comprise following some:

(1) irrelevant with transmission medium

The transmission medium that constitutes RPR can be SDH (Synchronous digitalhierarchy SDH (Synchronous Digital Hierarchy)), SONET (Synchronous optical network Synchronous Optical Network), FDDI (Fiber Distributed Data Interface Fiber Distributed Data Interface), or Gigabit (1GE or 10G) or the like;

(2) support the data of clean culture, multicast, broadcasting to transmit

For unicast service, the website on the RPR need judge that peeling off still is the forwarding packet, and for broadcasting and multicast service, website only need receive and transmit packet, up to the Source Site packet is peeled off from ring.Do not need to duplicate the lot of data bag to be sent to different destinations, saved bandwidth widely.

(3) support multiple service class

I.Class A (rank A): in the bandwidth of distributing, guarantee minimum time-delay;

II.Class B (rank B): guarantee conditional time-delay in the bandwidth of distributing, allow the business of service class COS (Class of Service) to surpass the bandwidth of distributing, the business that surpasses bandwidth this moment is considered professional the same with Class C (rank C);

III.Class C: as far as possible guarantee time-delay.

(4) effectively utilize loop bandwidth

A RPR ring adopts twin nuclei, and two rings forming this RPR ring carry out data simultaneously and transmit, and bandwidth sharing and statistic multiplexing in the supporting ring are peeled off unicast packet at the purpose website, make the bandwidth usage efficient of RPR looped network be greatly improved.In addition, RPR ring can also be recycled and untapped bandwidth is distributed again the bandwidth of having distributed.

(5) fairness mechanism

Competition is during bandwidth between each website on a RPR loop, and the fairness mechanism of RPR ring can effectively guarantee to compete the fair bandwidth of enjoying between the website, makes the competition website carry out business transmission according to the weights to its distribution.

(6) plug and play

Without any need for human intervention, the automatic topological discover of RPR mechanism just can realize the operations such as interpolation, deletion and recovery of website easily.

(7) protection is switched fast

RPR provides two kinds of looped network protection switching mechanism: Wrapping (loopback) and Steering (source routing) fast.These two kinds of protected modes can realize 50 milliseconds ring protection time.

Introduction about the technical characteristic of RPR looped network sees also http://www.ieee802.org/17.

At present for the application of RPR generally based on the application of single RPR loop; Or adopt Ethernet/router to link to each other between many rings, realize operation exchange between a plurality of loops with this.

Single cyclic system is applied to professional the needs less and not and the mutual or mutual fewer situation of miscellaneous equipment as shown in Figure 1 usually.Shown in Figure 1 is typical application scheme among the IEEE802.17.In Fig. 1, RPR ring 10 is schematic diagrames of a RPR loop, comprises four websites 101,102,103,104.Described equipment can be communication equipment, switch, optical transmission device or router etc.This RPR website can be the switch with RPR function, equipment such as router or SDH, or the equipment that only has the RPR function.Owing to the present invention relates at least two RPR rings, therefore do not describe the technical characterictic of monocycle in detail at this.

Though it is the typical application scheme of IEEE802.17 that single RPR loop is used, but for the communication that relates between two or more RPR loops, single RPR loop can not provide support, and is suitable for two solutions that the RPR loop is interconnected so just had, as shown in Figure 2.

Described by RPR in the interconnected system that constitutes at Fig. 2, RPR ring 21 comprises four websites 211,212,213,214; RPR ring 22 comprises four websites 221,222,223,224.In Fig. 2, interconnected by Ethernet between RPR ring 21 and the RPR ring 22, website 212 and website 224 are responsible for the conversion of Ethernet and RPR frame format.Interconnected between two

loops

21 and 22, just can intercourse business by Ethernet between them, concrete swap operation is by two interconnected websites-for example 212 and 224 carry out.Business between two

rings

21 and 22 also can exchange through switch 24,26.Switch 24 and 26 also can receive respectively from separately

local device

23 and 25 local service, and respectively the business from other websites is sent to this two

local devices

23 and 25.

Yet, by the interconnected RPR loop of Ethernet, have very big technical problem, also promptly: can not the transannular passage between

website

212 and 224 be granted asylum.Because if the transannular passage between

website

212 and 224 breaks down, just can not realize professional exchange between the

RPR ring

21 and 22 so.In addition, if between two

RPR rings

21 and 22, realize the connection of many Ethernets, will cause broadcast storm.

In order to solve broadcast storm and transannular path protection problem, a kind of technical scheme is to adopt router to realize interconnected between the RPR ring, as shown in Figure 3.In Fig. 3, ring 310 comprises four websites 311,312,313,314; Ring 320 comprises four websites 321,322,323,324.In Fig. 3, interconnected between two RPR ring 310,320 realized by router three 01 and 302.Which decide to passage transmission data by router three 02.Which if router three 02 breaks down, then decide to passage to send data by router three 01.If the channel failure between router three 02 and RPR ring 310 or the RPR ring 320 is recomputated by router three 01, walk to protect passage, i.e. passage between router three 01 and the ring 310 and 320.

But; realize that RPR encircles the transannular passage between 310,320 if adopt router three 01,302; so in the transannular passage breaks down; the guard time of transannular passage will depend on the guard time of router; and the guard time of router is all more than the second level; can not reach carrier-class protection requirement, the carrier-class guard time is not more than 50 milliseconds.In addition, by interconnection technique scheme shown in Figure 3, can not between ring 310,320, guarantee service class CoS, reason has been passed through router between being to encircle 310,320, router can be replaced the information of Frame, causes adopting the information of two layers degree of separation can not import in another loop.

In view of the above-mentioned defective of prior art, need provide a kind of and can cross over a plurality of RPR ring realization transannulars method and website professional and balancing flow between a plurality of RPR transannular business reliably.

Summary of the invention

The object of the present invention is to provide a kind of application of RPR interconnection technique; with the advantage of RPR be incorporated into interconnected in, can realize link aggregation, logically regard a transannular link aggregation as; have the carrier class protective capability, behind transannular, still have the identical CoS of former RPR ring.

In one aspect of the invention, the method that realizes link aggregation between a kind of interconnected RPR in many Resilient Packet Ring interconnected systems is provided, described interconnected systems comprises first Resilient Packet Ring and second Resilient Packet Ring at least, described Resilient Packet Ring comprises two transannular websites at least, described method comprises the steps: to set up at least two transannular passages between first Resilient Packet Ring and the second grouping ring, with transmission transannular business; Wherein select a transannular website to come transmission transannular business on corresponding transannular passage according to the aggregation strategy of configuration.

Preferably, above-mentioned method also comprises: by sending message at a certain time interval between the transannular website on the identical Resilient Packet Ring, detect transannular website fault or transannular channel failure.

Preferably, in above-mentioned method,, then select a transannular website to come transmission transannular business on corresponding transannular passage according to the aggregation strategy of configuration if detect transannular website fault or transannular channel failure.

Preferably, above-mentioned method also comprises: distribute unique site identifier for the transannular website on the identical Resilient Packet Ring.

Preferably, in above-mentioned method, described site identifier comprises: first site identifier is used for the transannular business; And second site identifier, be used for local service.

Preferably, in above-mentioned method, described first site identifier is identical.

Preferably, described method also comprises: the service class of the transannular business in first Resilient Packet Ring is delivered in second Resilient Packet Ring unchangeably.

Preferably, in above-mentioned method, the described time interval is configurable in 50～50000 microseconds.

In another aspect of the present invention, the transannular website of realizing link aggregation between a kind of interconnected transannular grouping ring in the Resilient Packet Ring interconnected systems also is provided, comprise: protection policy configurations device is used for the protection strategy of configuration site and judges whether the service class of transannular business is identical with the service class that website self is disposed; And the transannular business processing device, be used for according to the judged result of described protection policy configurations device and optionally the transannular business sent to the transannular passage.

Preferably, described website also comprises condition checkout gear, be used to detect other transannular website or respectively by they interconnected transannular passage work whether normal.

Preferably, the described condition checkout gear in the described website also is configured to send message at a certain time interval on the Resilient Packet Ring at this website place, and is working properly to show self.

Preferably, break down, the message that send then correspondingly is set if described website detects by its interconnected transannular passage.

Preferably, if detect another transannular website fault of identical Resilient Packet Ring or by the interconnected transannular channel failure of this another transannular website, then described protection policy configurations device is revised the protection strategy of this website selectively.

Preferably, described website also comprises: memory, the site identifier that is used to store unique identification self.

Preferably, described website also comprises: the service class filling device is used for before described transannular business processing device sends to the transannular passage to the transannular business service class of this transannular business being filled into the transannular traffic frame unchangeably.

By adopting said method of the present invention and website, the invention provides following advantage:

(1) on interconnecting channels, transannular link aggregation technology of the present invention can have many passages between a plurality of RPR rings, reach the purpose of link aggregation and protection.If certain bar channel failure, then the business on this passage is transferred on other passage automatically, and does not have the broadcast storm problem, because there is not loop on logical topology.For non-transannular website, do not need to know the existence of transannular website.

(2) on traffic management, transannular link technology of the present invention can make the transannular business transmit on multilink, reaches the purpose of link aggregation.

(3) aspect interconnected protection, transannular link technology of the present invention can be transferred on other transannular passage when channel failure automatically, and its guard time that is to say that less than 50 milliseconds protection this guard time has reached the carrier class protection.The quick resist technology of this protection and RPR technology is separate, that is to say to communicate by letter between a plurality of RPR rings, and when breaking down, this guard time still can reach the required standards.

(4) aspect interconnected CoS, transannular link technology of the present invention can be accomplished identical CoS to same business between a plurality of RPR loops.

In sum, transannular link technology of the present invention has made full use of the characteristics of RPR technology, has utilized the characteristics of this technology again, makes RPR transannular business have the transmission of CoS between link aggregation, carrier-class protection and the RPR loop.

RPR interconnection technique of the present invention has following characteristics:

Expand the function of RPR, and do not influenced the function of RPR own;

The transannular business will be assigned on each transannular passage according to subscriber policy or automatic strategy, reach the link aggregation purpose, and for the user, this process is transparent, only sees a logical links.

The transannular business is protected, and protection switch time is less than 50 milliseconds, well below existing various technology;

When protection took place the transannular passage, other non-transannular website was indifferent to corresponding message, and does not need to carry out again address learning;

Collaborative work is simultaneously switched in switching fast with of the present invention of RPR, and guard time is not adding up of two guard times, but gets a wherein long value.

On the RPR ring, interconnected website can be on loop the optional position, and do not require the logical place of each transannular website;

After business was interconnected, its CoS still can keep, and has identical CoS on the another one loop:

For each transannular website, still can carry local service, it is multiplexing to reach website;

Site ID does not also require it must is MAC Address, can be self-defined goes out unique indications;

The number of transannular passage is not limit;

The transannular Site ID does not also require that be the same on identical RPR ring.

Description of drawings

Below with reference to accompanying drawing various embodiments of the present invention only are described by way of example, so that understand the present invention better, in the accompanying drawings, identical identical or similar function or the element of Reference numeral representative.

Fig. 1 is the schematic diagram of technical scheme of the single RPR loop of prior art.

Fig. 2 utilizes the Ethernet mode to realize the schematic diagram of technical scheme interconnected between the RPR ring in the prior art.

Fig. 3 utilizes router mode to realize the schematic diagram of technical scheme interconnected between the RPR ring in the prior art.

Fig. 4 is the schematic diagram of RPR ring interconnected systems according to an embodiment of the invention.

Fig. 5 is the schematic diagram that sends of description messages according to a preferred embodiment of the invention.

Fig. 6 is the flow chart that illustrates to come according to a preferred embodiment of the invention the process of processing messages.

The schematic diagram of Fig. 7 explanation between RPR, carrying out transannular business polymerization.

Fig. 8 explanation is according to the schematic diagram of embodiments of the invention in the fail safe of RPR transannular website.

Fig. 9 explanation is according to the schematic diagram of inventive embodiment in the fail safe of RPR interconnecting channels.

Embodiment

Fig. 4 is the schematic diagram of RPR ring interconnected systems according to an embodiment of the invention.RPR ring interconnected systems shown in Figure 4 comprises two RPR rings 410 and 420.Wherein, RPR ring 410 comprises four websites 411,412,413,414; RPR ring 420 comprises four websites 421,422,423,424.This RPR website can be the equipment that only has the RPR function, can also be the switch with RPR function, equipment such as router and SDH.

Should be noted that, though the RPR that is drawn in Fig. 4 ring interconnected systems comprises two RPR rings, in fact, a RPR ring interconnected systems can comprise more than two RPR ring, can comprise a plurality of RPR rings, but will have two RPR rings can constitute a RPR ring interconnected systems at least.Otherwise, be exactly the application technology scheme of the monocycle of Fig. 1.

Be also noted that, though only drawn four websites on each the RPR ring shown in Fig. 4, but the number that it will be appreciated by those skilled in the art that website in the RPR ring of the present invention is not limited to 4, and concrete number number will be determined according to real business demand.All a plurality of websites can be arranged on each RPR ring, certainly, the website number that is had on the ring 410,420 can be identical, also can be inequality.But, two websites should be arranged on each RPR at least, otherwise a RPR ring that includes only a website is just without any practical significance.

RPR ring has the automated topology characteristic, and when increasing in RPR ring 410,420 or cancelling website, RPR ring 410,420 all can automatically identify cancelling of the website that increases newly and existing website, so just without any need for artificial intervention.

Fig. 4 shows and utilizes different Site IDs to realize the signal of RPR system for interconnecting.As shown in the figure, RPR ring 410 and RPR ring 420 by website 411,421}, 412,424} and { 413,423} is interconnected, wherein to combine together be a RPR equipment for website 411 and S, and this RPR equipment can be the switch with RPR function, router, SDH equipment or the like, wherein S just represents switch, other function except that the RPR function such as router, SDH etc.The present invention utilizes the frame format of RPR on the RPR basis, for the different Site ID of the professional employing of the professional and non-transannular of transannular, realization local service and transannular business are transmitted on RPR.Each interconnected website had two source identifier SID (Source Indentification).At website 411, to local service, its ID is ID2; To the transannular business, its ID is ID1.At website 412, to local service, its ID is ID4; To the transannular business, its ID is ID3.At website 413, to local service, its ID is ID9; To the transannular business, its ID is ID8.At website 421, to local service, its ID is ID6; To the transannular business, its ID is ID5.At website 423, to local service, its ID is ID11; To the transannular business, its ID is ID10.At website 424, to the transannular business, its ID is ID7.Though should be noted in the discussion above that the site identifier that does not identify the local service of website 424 among Fig. 4, do not represent website 424 cannot receive local service and local service is sent on the local device.Because in nature, the transannular website is the same.On RPR ring 410, all need mail to the business of RPR ring 420, its point of destination dot address be ID1 (site identifier of 411 pairs of transannular business of website) or ID3 (site identifier of 412 pairs of transannular business of website) or ID8 (site identifier of 413 pairs of transannular business of website) (specifically select which ID by send website study at that time to ID be as the criterion); And all are mail to the local service of 412 websites, its purpose ID is ID4, and the like, the site identifier that mails to the local service of website 411 is ID2, the site identifier that mails to the local service of website 413 is ID9, the site identifier that mails to the local service of website 421 is ID6, and the site identifier that mails to the local service of website 423 is ID11.

Though should also be noted that and only drawn 3 transannular passages that connect two RPR rings among Fig. 4, the number of the transannular passage between two RPR rings is not limited to 3, can be more than 2 or 2, preferably more than 2.The concrete number of transannular passage depends on actual transannular traffic carrying capacity.Wherein, interconnecting channels can adopt the network of wired mode-such as the internet, also can adopt wireless mode to connect, and described interconnecting channels can be connections such as coaxial cable, optical fiber for example, also can have the internet between interconnecting channels.

Need to prove, be adjacent on the position at the transannular website shown in Fig. 4, but embodiments of the invention and do not require that these websites must be adjacent, and the transannular website can be on the optional position in the RPR ring.Preferably, can be adjacent being used for that the transannular website is arranged on the position, reason is if fault has taken place one of them website, the transannular business packet can have the path the same with original route under the adjacent situation of website so, if it is adjacent that website is not configured to, the professional path that will walk of transannular just may be elongated so, thereby make the transannular business elongated to the time that the purpose website is spent from the Source Site.

Transannular website 412 on the RPR ring 410 comprises (in fact each transannular website also all comprises): receiving system is used to receive business datum; The type of service judgment means is used to judge that the business datum that described receiving system receives is the business of what type, is that this ring is professional, transannular is professional or local service.If this ring is professional, then described business datum is sent to included this ring business processing device of website 412, be used for that the business that needs send to RPR ring 410 is carried out RPR and handle and send.If the business datum that is received is the transannular business, then the transannular business is sent to the service class filling device, be used for the service class CoS information of this ring is filled into the transannular traffic frame, then, to send to the transannular business processing device through the transannular traffic frame of filling, be used to handle described transannular business and send it to transannular passage 440, be sent to then in the RPR ring 420; If the data service that is received is a local service, then described business datum is sent to the local service processing unit, after this business datum is handled through this local service processing unit, the business datum after this processing is sent to local device 43.Transannular website 412 also comprises condition checkout gear, is used to detect this ring and goes up other transannular websites for example 412,413 and whether normally work by the transannular passage 440,450 that they are responsible for.Transannular website 412 also comprises a protection policy configurations device; the protection strategy that is used for configuration site; and judge from the service class of the transannular business of described receiving system reception; if the service class of the transannular business that is received is identical with the protection level of distributing to self; then handle this transannular business, otherwise just this transannular business is put on the ring 410.

About above-mentioned site identifier, at different business, site identifier can adopt medium access control sublayer MAC (Media Access Control) address to label.Certainly, also can adopt other address or the mode identifier ID that is used as identifying website, also can self-defined a kind of identification means, as long as it is just passable to identify a website uniquely.The site identifier ID of each website oneself is stored in respectively in separately the memory.The memory that each website had can adopt various forms of read-write formula memories to realize.For the Site ID of each transannular website, and do not require that they must be inconsistent, consider, use identical ID, realize simpler from simple angle.

Below be that example is described with transannular website 411.Under the normal condition,, receive after the business of transannular passage 430, will in the source address of RPR frame head, insert ID1 according to the frame format encapsulation of RPR to website 411.To from the business datum on the local device 41, then in the RPR frame head, encapsulate ID2.It is the Frame of ID2 that website 411 receives all purpose websites, and reception purpose website is the Frame of ID1.To the Frame of ID2, will not send on the transannular passage, to the Frame of ID1, then only send on the transannular passage.In like manner, website 412,413,421,423 and 424 is made similar operations.To website 414,, different business is sent to the different website of site identity according to the address of self study.

For the website 414 of non-transannular website-for example,, will encircle at RPR and send multicast or multicast frame on 410 when not learning the transannular website for example during the address of website 412.Transannular website 411,412 and 413 will receive the broadcast/multi broadcast frame according to strategy.This strategy can be joined, such as according to VLAN (the Virtual LocalArea Network VLAN) ID of the traffic classification principle of RPR, MAC Address, ethernet frame, Internet protocol IP address or the like mode is disposed.Judge whether to receive this business according to the principle that is disposed.Receive this business if desired, then send it to the transannular passage,, then disregard, directly be transmitted to next website if do not need to receive this business.With RPR traffic classification principle (rank A/B/C) is example, can be configured to receive website 411 business of rank A, and website 412 is configured to receive non-A service or the like mode.。With VLANID strategy for example,, can be arranged to receive only VLAN ID to website 411 less than 1000 business, and website 412 is configured to receive VLAN ID more than or equal to 1000 business if loaded service is an Ethernet service.

Each transannular website for example on the website 411,412,413 on the RPR ring 410 operation transannular website monitoring mechanism come maintain communications, be used to find the state of other transannular websites on the RPR loop 410, and whether detect other website working properly.

For example website 412 lost efficacy or transannular passage after for example passage 440 lost efficacy when certain transannular website, and other transannular website will detect this inefficacys by monitoring mechanism, and operation strategy website that the business of this transannular passage is transferred to appointment receives and transmission automatically.This strategy also can be joined, and can adopt website conversion priority, perhaps determines according to modes such as Site ID sizes.Adopt transannular website monitoring mechanism, just can guarantee to the service protection time will be less than 50 milliseconds.When having the above transannular website of three or three, need the configuration protection preference strategy, this strategy is used for after losing efficacy when certain transannular website, need receive business with handling failure transannular website by remaining which website in the transannular website.Illustrate, the protection preference strategy is set according to the Site ID size, the priority height that the ID value is big, the priority that the ID value is little is low.After certain website broke down, the business that this fault website is handled received processing by the maximum website of ID value in the remaining website so.

Under optimal way, the transannular website comprises a timer, is used for regularly, and this timer only starts detect the recovery of fault transannular website when normal transannular website after.At this hypothesis website 411 are fault websites, the 412nd, and normal transannular website, and after website 411 breaks down, receive the transannular business that mails to website 411.After website 412 detects website 411 recoveries normally, activate the timer that is had, and an initial time is set for this timer.This timer begins this initial time is carried out countdown, when the initial time that sets arrives the zero a certain moment before, website 411 self becomes again in the time of can receiving professional identity, and website 412 sends message to website 411, recovers the identity of original website with request website 411.Also do not arrive before zero if work as the time of setting, former transannular website breaks down again, then stops this timer, has only ought detect former website recovery once more normally, and this timer just activates again, and resets initial time.

Fig. 5 is the schematic diagram that sends of description messages according to a preferred embodiment of the present invention.As described in conjunction with Fig. 4, whether operation transannular website monitoring mechanism comes maintain communications with this on each transannular website 411,412,413,421,423,424, thereby find the state of other transannular websites on the RPR loop and detect other site works normal.At a preferred embodiment, described testing mechanism is realized by message mechanism, particularly is to send message to realize between each transannular website 411,412,413,421,422,423,424.According to described preferred embodiment, described message comprises three types message, MSG_A 51, MSG_B 52 and MSG_C53.In conjunction with Fig. 5, keepAlive (maintenance activity) message of MSG_A 51 expressions between the transannular website on the identical RPR.MSG_B 52 be illustrated in and the transannular website between keepAlive message, described S can be switch, router, SDH etc.KeepAlive message between the Sx at MSG_C 53 expression transannular passage two ends.Wherein, MSG_B 52 and the existing agreement relevant of MSG_C 53 suggestion uses with Sx, such as for switch, can use LACP (Link Aggregation Control Protocol: Link Aggregation Control Protocol)) or hardware supports etc., because above-mentioned MSG_B 52 and MSG_C 53 are irrelevant with theme of the present invention, therefore just not in this detailed description.To RPR ring 410, whether normally transannular website 411,412,413 timed sending MSG_A message, this message comprise transannular passage work mode field.The frequency that each transannular website sends MSG_A 51 is 50～50000 microseconds.The quality of transannular passage is detected by corresponding apparatus, and is arranged on described mode field in MSG_A 51 frames according to the fine or not situation of detected channel information.Transmission between above-mentioned MSG_A message each transannular website in same ring.

The website 410 that for example encircles in 410 is the example explanation, and website 410 sends MSG_A 51 message termly on ring 410, and correspondingly, transannular website 412,413 also sends MSG_A 51 message termly on ring 410.When website 411 does not receive MSG_A 51 message from website 412 in certain interval, then think website 412 faults.If represent to be broken down by website 412 interconnected transannular passages 440 in the mode field of website 411 from MSG_A 51 message that website 412 receives, then deciding by website 411 according to the protection preference strategy of above-mentioned configuration still is that website 413 is responsible for the transannular business that the transfer station point identification is ID3.For site identity is the business of ID4, then still has website 412 to handle, and mails to site-local 43.

With RPR 410 is that example illustrates this process.This process is from step S601.Then, this process enters into step S602, in this step, is that example is illustrated with transannular website 411.The condition checkout gear of transannular website 411 receives MSG_A message 51 from transannular website 412,413.If the condition checkout gear of transannular website 411 does not receive MSG_A message 51 from this transannular website 412,413 within a certain period of time, then this process just enters into step S604.At step S604, transannular website 411 is just determined fault not occurred from its that website that receives MSG_A message 51.The described regular hour can dispose, and scope is in 50 microseconds～50000 microseconds, and preferred value is 2000 microseconds.In RPR ring 410, at website 411, then can detect is that fault has appearred in website 412 or 413, and then, this process enters into step S606.If the condition checkout gear of transannular website 411 has received MSG_A message 51 within a certain period of time from transannular website 412,413, then definite transannular website 412,413 is normally being worked.Then, this process enters into step S603.Whether at step S603, the condition checkout gear of transannular website 411 is checked mode field from received MSG_A message 51, normal to determine transannular passage 440 or 450 work.Any fault occurred if the mode field in the MSG_A message 51 shows the transannular passage be responsible for by transannular website 412,413 440,450, and then this process enters into step S605.At step S605, transannular website 411 judges that fault has appearred in the transannular passage.Then, this process enters into step S606, in this step, will switch priority policy according to the protection that sets and determine whether replace the fault website to receive the transannular business of this fault website.If do not need, then enter step S602; If desired, then enter step S607.At step S607,, enter into step S602 then with receiving the business of fault website.

In said process, judge 412 inefficacies of transannular website or the transannular passage of being responsible for by transannular website 412 440 when transannular website 411 and fault occurred, all mail to the transannular business that purpose is designated ID3 that takes place in local reception according to strategy.

Professional for transannular, transannular website 411,412,413 is put into the classified information of the service class CoS (rank A/ rank B rank C) of this transannular business on RPR ring 410 in the frame head of this transannular business by its service class filling device, then, send it to the transannular business processing device, after treatment, the professional RPR of transmission of this transannular is arrived ring 420.Then, resolve frame head, will be mapped in the classified information of RPR in the service class on the ring 410 then, realize sharing of service class CoS by the transannular website 421,424 and 423 of RPR ring.

The schematic diagram of Fig. 7 explanation between RPR, carrying out transannular business polymerization.Fig. 7 illustrates the transmission of transannular business on interconnected RPR ring with way of example.A among Fig. 7, b, c represent from website 414 to website three transannular business 422 respectively, and representing the business-level on the RPR ring 410 respectively is the three class business of A, B, C.Set three pairs of transannular websites (411,421), (412,424), (413,423) are transmitted rank A, rank B, rank C business respectively, and three pairs of transannular website toggle path priority are set is 3,2,1.Need to prove that the protection strategy that is provided with here just is used to illustrate, and is not in order to limit.

To the professional a of transannular, transannular website 411 is put into the classified information of the service class CoS (comprising service class A, B and C) of this ring in the frame head of the professional a of transannular respectively, is sent to RPR loop 420 by transannular passage 430.Transannular website 421 on RPR loop 420 is resolved this frame head, then it is mapped in the classified information of RPR, realizes sharing of CoS.To the professional b of transannular, c does same the processing,

In this hypothesis, the transannular website 411 of RPR ring 410 is given RPR ring 420 according to the service concurrence that configuration will receive only rank A, transannular website 421 at RPR ring 420 receives after the business of interconnecting channels, normal flow according to RPR is handled, and also is about to the website 422 that professional a sends to RPR ring 420 in this example.In like manner to professional b, c will receive and send to RPR ring 420 by website 412 and website 413 respectively on RPR ring 410.As can be seen from Figure 7, on the RPR ring 410 a is arranged, b, three kinds of transannular business of c, but these three kinds of business are to arrive RPR ring 420 through different interconnecting channels respectively, rather than arrive RPR ring 420 by a transannular passage, that is to say, realized link aggregation between the ring 410 and 420 in the present invention, multilink has been condensed together form a logical links.Again because the transannular link logically has only a link, so the problem of no broadcast storm.

Fig. 8 explanation is according to the schematic diagram of embodiments of the invention in the fail safe of RPR transannular website.The disposition of transannular business when Fig. 8 illustrates transannular website 411 faults with way of example.Certainly, this is an example with website 411 just, and each transannular website all has the possibility of inefficacy.As shown in FIG. 7, professional a, b, the c representative is three transannular business 422 from website 414 to website.Under normal circumstances, professional a arrives RPR ring 420 via website 411 and 421 s' transannular passage 430; Professional c arrives RPR ring 420 via website 412 and 424 s' transannular passage 440; Professional c arrives RPR ring 420 via website 413 and 423 s' transannular passage 450.

In Fig. 8, transannular website 411 periodically receives MSG_A message 51 from website 412 and 413 and judges whether fault of transannular website 412 and 413, in like manner transannular website 412 will periodically receive the MSG_A message from transannular website 411 and 413, and the reception of 413 cycle of transannular website row is from the MSG_A message of transannular website 411 and 412.If 412 and 413 condition checkout gear does not receive MSG_A 51 message from transannular website 411 in official hour; then think 411 website faults; the conversion priority of supposing set protection switching priority 412 websites is higher than 413; switch priority 412 websites according to set protection and will receive the business that former 411 websites receive; be that purpose ID is the business of ID1; transannular website 412 still will receive original professional simultaneously; be that the purpose Site ID is the business of ID3; promptly will receive professional a simultaneously; b, and mail to RPR ring 420 by transannular passage 440.It is a RPR equipment that website 411 and S1 combine, this RPR equipment can be the switch with RPR function, router, SDH equipment or the like, wherein S just represents switch, router, other function except that the RPR function such as SDH find with website 411 between is connected lost efficacy after, need tell s2 (using the transmission of MSG_B and MSG_C message), encircle on 420 421 at RPR and will arrive the transannular channel failure by the MSG_B message detection, then, carry out the handling process of Fig. 7.After this was handled, the transannular business reached the purpose of protection.In the topology of Fig. 8, because website 411 faults, the RPR protection module will start so, and all will walk new sending direction according to up-to-date topology through the business of website 411, promptly professional a, and b will not walk original ring direction, as shown in Figure 8.In this embodiment promptly; RPR protection and transannular of the present invention protection are all worked simultaneously; wherein the startup of the startup of RPR protection and transannular protection is all protected professional a; because RPR protection and transannular protection start simultaneously; because the RPR guard time is less than 50 milliseconds; and the transannular guard time also is less than 50 milliseconds, and these two kinds of protections are again separate, so the guard time of professional a is less than 50 milliseconds.

Fig. 9 explanation is according to the schematic diagram of inventive embodiment in the protection of RPR transannular channel failure.When Fig. 9 lost efficacy with way of example explanation transannular passage 430, for the situation of transannular business and local service processing.As shown in FIG. 7, professional a, b, the c representative is three transannular business 422 from website 414 to website.Under normal circumstances, professional a arrives RPR ring 420 via website 411 and 421 s' transannular passage 430; Professional b arrives RPR ring 420 via website 412 and 424 s' transannular passage 440; Professional c arrives RPR ring 420 via website 413 and 423 s' transannular passage 450.

In Fig. 9, transannular website 411 periodically receives MSG_A message 51 from website 412 and 413 and judges whether fault of transannular website 412 and 413, in like manner transannular website 412 will periodically receive the MSG_A message from transannular website 411 and 413, and the reception of 413 cycle of transannular website row is from the MSG_A message of transannular website 411 and 412.Website 411 detects the transannular channel failure, and the mode field in MSG_A 51 frames is set to channel failure, sends then, and stops to receive the frame that purpose ID is ID1, promptly professional a.Website 412 and 413 receives MSG_A 51 frames of website 411; handle according to Fig. 6 flow process; with the transannular channel failure that detects on the website 411; according to the protection switchover policy that sets; the priority of website 412 is higher than 413; switch priority according to the protection of setting; website 412 will receive the business that former 411 websites receive; be that purpose ID is the business of ID1; transannular website 412 still will receive original business simultaneously, and promptly the purpose Site ID is the business of ID3, promptly will receive professional a simultaneously; b, and mail to RPR ring 420 by transannular passage 440.421,422 of websites on RPR ring 420 are made same processing.After this was handled, the transannular business had just reached the purpose of protection.

Should be noted in the discussion above that the foregoing description is to of the present invention illustrating and unrestricted, and those skilled in the art can design many optional embodiments under the situation of the scope that does not deviate from claims.

Claims

1. realize the method for link aggregation between the interconnected RPR in many Resilient Packet Ring interconnected systems, described interconnected systems comprises first Resilient Packet Ring and second Resilient Packet Ring at least, described Resilient Packet Ring comprises two transannular websites at least, and described method comprises the steps:

Between first Resilient Packet Ring and the second grouping ring, set up at least two transannular passages, with transmission transannular business;

It is characterized in that:

Select a transannular website to come transmission transannular business on corresponding transannular passage according to the aggregation strategy of configuration.

2. the method for claim 1 also comprises: by sending message at a certain time interval between the transannular website on the identical Resilient Packet Ring, detect transannular website fault or transannular channel failure.

3. method as claimed in claim 2 wherein, if detect transannular website fault or transannular channel failure, then selects a transannular website to come transmission transannular business on corresponding transannular passage according to the aggregation strategy of configuration.

4. as each described method among the claim 1-3, also comprise: distribute unique site identifier for the transannular website on the identical Resilient Packet Ring.

5. method as claimed in claim 4, wherein said site identifier comprises: first site identifier is used for the transannular business; And second site identifier, be used for local service.

6. method as claimed in claim 5, wherein said first site identifier is identical with other transannular websites on the identical Resilient Packet Ring.

7. as each described method among the claim 1-3, also comprise: the service class of the transannular business in first Resilient Packet Ring is delivered in second Resilient Packet Ring unchangeably.

8. as each described method among the claim 2-3, the described time interval is configurable in the 50-50000 microsecond.

9. transannular website that is used between the interconnected RPR of Resilient Packet Ring interconnected systems realizing link aggregation comprises:

Protection policy configurations device is used for the protection strategy of configuration site and judges whether the service class of transannular business is identical with the service class that website self is disposed; And

The transannular business processing device is used for according to the judged result of described protection policy configurations device and optionally the transannular business is sent to the transannular passage.

10. website as claimed in claim 9, wherein said website also comprises condition checkout gear, be used to detect other transannular website or respectively by they interconnected transannular passage work whether normal.

11. whether website as claimed in claim 10, described condition checkout gear also are configured to send message at a certain time interval on the Resilient Packet Ring at this website place, normal to show this site works.

12. website as claimed in claim 11 breaks down if described website detects by its interconnected transannular passage, and the message that send then correspondingly is set.

13. as each described website among the claim 10-12; wherein; if detect another transannular website fault of identical Resilient Packet Ring or by the interconnected transannular channel failure of this another transannular website, then described protection policy configurations device is revised the protection strategy of this website selectively.

14. as each described website among the claim 11-12, the wherein said time interval is configurable in the 50-50000 microsecond.

15. website as claimed in claim 9 also comprises: memory, the site identifier that is used to store unique identification self.

16. website as claimed in claim 15, wherein said site identifier comprises: first site identifier is used for the transannular business; And

Second site identifier is used for local service.

17. first site identifier of other transannular websites on the website as claimed in claim 16, wherein said first site identifier and identical Resilient Packet Ring is identical.

18. website as claimed in claim 9 also comprises: the service class filling device is used for before described transannular business processing device sends to the transannular passage to the transannular business service class of this transannular business being filled into the transannular traffic frame unchangeably.