CN100466582C - Cross interconnection method for RPR and cross site, cross RPR - Google Patents

Cross interconnection method for RPR and cross site, cross RPR Download PDF

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Publication number
CN100466582C
CN100466582C CNB2005100773316A CN200510077331A CN100466582C CN 100466582 C CN100466582 C CN 100466582C CN B2005100773316 A CNB2005100773316 A CN B2005100773316A CN 200510077331 A CN200510077331 A CN 200510077331A CN 100466582 C CN100466582 C CN 100466582C
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website
crossing
control frame
priority
opposite end
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CN1885809A (en
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张晓琳
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New H3C Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
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    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/906—Fiber data distribution interface, FDDI
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/907—Synchronous optical network, SONET

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Abstract

The disclosed interconnection method for elastic group ring comprises: determining two intersected sites as the main and inferior site, connecting/breaking the inner channel of the main/inferior site; when at least one site broken on a ring, and connecting its inside from site. This invention can eliminate broadcast storm, meets high availability request, and needs fault switch time in 50ms.

Description

The crossing interconnecting method of Resilient Packet Ring and crossing website, crossing Resilient Packet Ring
Technical field
The present invention relates to Resilient Packet Ring (RPR, Resilient Packet Ring), relate in particular to a kind of crossing interconnecting method of Resilient Packet Ring and intersect website, crossing Resilient Packet Ring.
Background technology
RPR is IEEE (Institute of Electrical and Electronics Engineers; IEEE) a kind of novel MAC (the Media Access Control of 802.17 working groups definition; medium access control system) layer protocol; it has merged SONET/SDH (Synchronous Optical Network/Synchronous Digital Hierarchy; synchronous optical network/SDH (Synchronous Digital Hierarchy)) and the technical advantage of Ethernet, have less than 50 milliseconds of protections switch, multiple technologies characteristics such as topological automatic discovering and high bandwidth utilization.
RPR adopts two-way two fine ring topologies, and ring and outer shroud in each RPR ring all comprises can transport services on the inner and outer ring, but transmission direction is opposite.
At present, the RPR looped network is applied in the various levels of network gradually.In some catenets, an independent ring can't satisfy networking requirement, and can adopt phase cross ring or tangent rings this moment usually.The topological structure of RPR tangent rings as shown in Figure 1, website 111, website 112 and website 113 are positioned on the RPR ring 110, website 121, website 122 and website 123 are positioned on the RPR ring 120, and website 130 is positioned on the RPR ring 110 and 120 simultaneously, and RPR ring 110 is connected by tangent website 130 with 120 in other words.The topological structure of RPR phase cross ring as shown in Figure 2, being positioned at simultaneously among Fig. 2 on the RPR ring 110 and 120 is two websites 131 and 132, RPR ring 110 is connected with 132 by crossing website 131 with 120 in other words.RPR phase cross ring also can have the crossing website more than three or three.
Relatively a downcrossings ring and these two kinds of topological structures of tangent rings are not difficult to find that Single Point of Faliure may appear in tangent rings, and than higher, in case tangent website 130 lost efficacy, the communication between two tangent rings will be interrupted to the reliability requirement of tangent website 130; And the phase cross ring is just lower to the reliability requirement that intersects website 131 and 132, and after a crossing website lost efficacy therein, two rings still can intersect the website proper communication by another one.As seen, the phase cross ring can effectively improve the availability of network.
But, when two or more RPR rings are formed phase cross ring topological structure, have some technical limitations.If the two or more rings that intersect belong to different subnet or VLAN (Virtual Local Area, VLAN), when the website on each ring communicates, do the network layer forwarding by crossing website and do not have any problem.If but the two or more rings that intersect belong to same subnet or VLAN, each encircles when upward website communicates, and just need do the link layer forwarding by intersecting website, and website just may be received the frame of repetition on the ring, and can broadcast storm in network, occur, cause network unavailable.
For example, in intersecting ring network network shown in Figure 2, RPR ring 110 and 120 belongs to same subnet, and all messages transmit along clockwise direction.Website 112 on the RPR ring 110 has sent a broadcasting packet on ring 110.When website 131 is intersected in broadcasting packet arrival, E-Packet to crossing website 132 Yi Bian intersect website 131, Yi Bian duplicate a message, to 120 broadcasting of RPR ring; When website 132 is intersected in broadcasting packet arrival, also can E-Packet to the website 113 in downstream on one side intersect website 132, Yi Bian duplicate a message, to 120 broadcasting of RPR ring; This broadcasting packet is dropped when getting back to Source Site 112.At this moment, a broadcasting packet that website 112 sends has become same two parts and has transmitted on RPR ring 120, cause the website on the RPR ring 120 to receive repeating frame.
But the transmission of broadcasting packet also far away at this point till.Similar to the above process, can be broadcast to once more on the RPR ring 110 by intersecting website 132 to the broadcasting packet on the RPR ring 120 through intersecting website 131 copy broadcast; Can be broadcast to once more on the RPR ring 110 by crossing website 131 too to the broadcasting packet on the RPR ring 120 through intersecting website 132 copy broadcast, this broadcasting packet arrives when intersecting website 132 on RPR ring 110 along clockwise direction, can be broadcast to again on the RPR ring 120, so constantly circulation, produced broadcast storm at crossing website 131 and 132 places, corrode the effective bandwidth of network, finally cause network unavailable.
Summary of the invention
The present invention will solve is that the crossing RPR ring that is in same subnet or VLAN in the prior art broadcast storm can occur and causes the disabled problem of network.
At least two Resilient Packet Ring rings have at least two crossing websites that are positioned at simultaneously on described two rings among the present invention, and crossing website has the inner passage can connect described two rings, and crossing interconnecting method of the present invention may further comprise the steps:
A) determine that two crossing websites are respectively home site and from website: with the crossing website with higher priority is home site, and another is from website; If the priority of two crossing websites is identical, the medium access control system MAC Address that then relatively intersects website decides home site and from website;
B) inner passage of connection home site disconnects the inner passage from website;
C) when being connected of two crossing websites disconnects at least one ring, be communicated with its inner passage from website; And, intersect and to send the interconnection control frame between website mutually, comprise the master slave mode that transmit leg is current and the information of priority in the described interconnection control frame, when this priority changes, if it is all normal to intersect the connection of website on described two Resilient Packet Ring, then change step a).
Preferably, the method for the invention also comprises: also comprise in the described step c): when being connected of two crossing websites disconnects at least one ring, rise to home site from website;
When the connection of two crossing websites on described two rings recovers just often, change step a).
Preferably, sending the interconnection control frame mutually between crossing website is to carry out when the information that comprises master slave mode or priority changes;
Information intersecting the crossing website in storage opposite end on the website comprises its master slave mode and priority;
When crossing website receives that the interconnection control frame of website is intersected in the opposite end, upgrade the information that website is intersected in the opposite end of storing on this website;
When the master slave mode of opposite end website or priority change,, change step a) if it is all normal to intersect the connection of website on described two Resilient Packet Ring; Otherwise do not process.
Preferably, the method of the invention also comprises: when the priority generation of home site can cause intersecting the variation of website switching master slave mode, if it is all normal to intersect the connection of website on described two rings, home site is before sending the interconnection control frame from website, drop to from website earlier, and the breaking inner passage.
Preferably, the method for the invention also comprises: intersect the website cycle to opposite end crossing website transmission interconnection control frame;
When crossing website is received the interconnection control frame, the opposite end of storing on upgrading this website also comprises before intersecting the information of website: judge store on distance station dot information and this website in this interconnection control frame whether identical, if identical then abandon this interconnection control frame.
Preferably, before described step a), also comprise:
Two crossing websites are initialized as from website;
Crossing website receives opposite end after the initialization when intersecting the 1st interconnection control frame that website sends, and the information that website comprises its master slave mode and priority is intersected in the storage opposite end on this website, and execution in step a).
Preferably, the method for the invention also comprises: transmission timer of each crossing station maintenance, the cycle timing that the control frame that is used to interconnect sends;
When sending the interconnection control frame, intersect website replacement transmission timer because of information change.
Preferably, described interconnection control frame is the RPR protocol control frame, and its control types is the reserved value of 802.17 standards, also comprises control frame version and described two instance identification of ring in network that intersect interconnection in the interconnection control frame.
Preferably, the method for the invention also comprises: when the connection of two crossing websites on described two rings recovers just often, disconnect its inner passage from website.
Preferably, the method for the invention also comprises: intersect the topological database of described two Resilient Packet Ring of website periodic queries, intersect the connection status of website on described two Resilient Packet Ring to check with the opposite end;
The topological database that described periodic queries is included in described two Resilient Packet Ring upgrades the inquiry of end back at every turn, or with the predetermined detection cyclic polling.
Preferably, value between 10 milliseconds and 10 seconds of described predetermined detection cycle; The described link layer that is connected to connects.
The present invention also provides a kind of crossing website of using above-mentioned crossing interconnecting method, intersecting website with the opposite end is positioned on two Resilient Packet Ring simultaneously, should intersect website and draw together crossing interconnection device, described crossing interconnection device comprises connection status detection module, parameter configuration module, interconnection control frame receiver module, station state processing module, internal channel control module and interconnection control frame sending module, wherein:
The connection status detection module periodically detects and stores the connection status of two crossing websites on two rings, notice station state processing module when connection status changes;
The crossing site parameter that comprises master slave mode and priority that parameter configuration module receives and storage is imported, notice station state processing module when the priority of input changes;
Interconnection control frame receiver module receive the opposite end intersect interconnection control frame that website sends and storage wherein comprise priority and master slave mode to client information, intersect the priority of website or master slave mode notice station state processing module when changing in the opposite end;
Internal channel control module intersects the inner passage of website according to the commands for controlling of station state processing module, when crossing website connection inner passage during for home site, and breaking inner passage for from website the time;
The station state processing module intersects connection status and the priority master slave mode that determine this website of website on two rings according to this website and opposite end, this website was a home site when wherein the connection at least one ring disconnected, and the connection on two rings all just often determines this website and opposite end to intersect that website is respectively home site and from website according to priority; The instruction internal channel control module is communicated with or the breaking inner passage when the master slave mode of this website changes, and instruction interconnection control frame sending module intersects website to the opposite end and sends the interconnection control frame when the master slave mode of this website or priority change;
Interconnection control frame sending module is being received the instruction back to opposite end crossing website transmission interconnection control frame.
Preferably, described crossing interconnection device also comprises the control frame transmission timer, and periodically instruction interconnection control frame sending module sends the interconnection control frame, restarts timing when receiving the instruction that the station state processing module is issued interconnection control frame sending module.
Preferably, described station state processing module intersects connection status and the priority master slave mode that determine this website of website on two rings according to this website and opposite end and is specially:
When receiving the notice of connection status detection module, if two connections of crossing website at least one ring disconnect, then this website is a home site; If two connections of crossing website on two rings are all normal, this website was a home site when then priority was higher than the opposite end, this website was from website when priority was lower than the opposite end, and the MAC Address that compares both sides when priority equals the opposite end decides the master slave mode of this website;
When receiving the notice of interconnection control frame receiver module, if two connections of crossing website at least one ring disconnect, then this website master slave mode is constant; If two connections of crossing website on two rings are all normal, this website was a home site when then priority was higher than the opposite end, this website was from website when priority was lower than the opposite end, and the MAC Address that compares both sides when priority equals the opposite end decides the master slave mode of this website;
When receiving the notice of parameter configuration module, if the priority after changing is lower than the opposite end, all normal and this website of the connection of current two crossing websites on two rings simultaneously is a home site, and then this website drops to from website.
The present invention also provides a kind of crossing Resilient Packet Ring, comprise at least two crossing websites, the inner passage of a crossing website is in open mode to realize two messages forwardings between the ring in described two crossing websites, described another crossing website forbids that two messages between the ring transmit to prevent broadcast storm by its inner passage, and, the crossing website that the inner passage is in open mode is a home site, and crossing website in addition is from website;
Send the interconnection control frame between described crossing website mutually, comprise the master slave mode that transmit leg is current and the information of priority in the described interconnection control frame, when this priority changes, if it is all normal to intersect the connection of website on described two Resilient Packet Ring, then: with the crossing website with higher priority is home site, and another is from website; If the priority of two crossing websites is identical, the medium access control system MAC Address that then relatively intersects website decides home site and from website.
Preferably, when the connection of described two crossing websites on some rings interrupted, described another crossing website was opened its inner passage.
Preferably, described two crossing websites interconnect control frame to determine both sides' connection status by the topology data storehouse of two rings of periodic queries or transmission regularly.
The present invention will be by intersecting website and be divided into home site and from website, disconnection is from the inner passage of website, when having eliminated phase cross ring operate as normal forwarding loop appears and thereby repeating frame has been eliminated broadcast storm, simultaneously when the connection of principal and subordinate's website on the phase cross ring disconnects, order rises to home site from website, make the phase cross ring topology in most cases still can work on after unusual occurring, satisfied the high availability requirement;
Further, the present invention decides the master slave mode that intersects website by dynamically arranging priority, can change the master slave mode that intersects website at any time in running, makes networking have controllability better;
Further, the present invention realizes that in conjunction with existing RPR protocol after implementing the present invention, the fail-over time of phase cross ring has guaranteed the performance of RRP network less than 50 milliseconds.
Description of drawings
Figure 1 shows that the structural representation of RPR tangent rings topology;
Figure 2 shows that the structural representation of RPR phase cross ring topology;
Figure 3 shows that the annexation schematic diagram that intersects website logic interfacing;
Figure 4 shows that the flow chart of third embodiment of the invention;
Figure 5 shows that the frame format of RPR control frame in 802.17 standards;
Figure 6 shows that the form of interconnection control frame payload segment among the present invention;
Figure 7 shows that the structure chart of the crossing interconnection device of the present invention.
Embodiment
In order to realize the phase cross ring topological structure of Resilient Packet Ring at link layer, thinking of the present invention is only to keep a link layer to transmit passage at two crossing interannulars, simultaneously with the backup of another crossing website as the forwarding passage.
To the present invention, per two crossing RPR rings are formed an application example.The present invention supports the application of a plurality of examples, because the state between a plurality of examples is independent of each other, for simplicity, embodiments of the invention all are described with single example.Simultaneously, if on the RPR that intersects in certain example ring two crossing websites of surpassing are arranged, then select two crossing websites to implement the present invention, and disconnect the inner passage of other crossing websites.
Crossing website has two interfaces to connect respectively on two RPR rings, and these two interfaces in fact are logic interfacing.Ring and outer shroud in each RPR ring comprises, a logic interfacing is made up of two physical interfaces accordingly, and a physical interface is from the outer shroud received frame, from interior ring transmit frame; Another physical interface is from interior ring received frame, from the outer shroud transmit frame.The annexation of crossing website logic interfacing as shown in Figure 3, it is right that crossing website constitutes one group of rpr interface in order to the logic interfacing that connects two RPR rings, the inner passage be rpr interface between in logic message forwarding path, in the present invention, when being communicated with this inner passage, two rpr interfaces between normally E-Packet; When disconnecting this inner passage, only transmit control frame between two rpr interfaces, do not transmit other messages;
The method of disconnection and connection inner passage decides according to the concrete equipment that intersects website.The simplest a kind of implementation is: abandon all messages that are sent to end interface forming on two right interfaces of this rpr interface, can realize rpr interface between the disconnection of inner passage; When stopping dropping packets, just be communicated with rpr interface between the inner passage.
In the present invention, intersecting website needs to detect respectively and the crossing connection status of website on two rings in opposite end, to determine the connection and the disconnection of two crossing website inner passages.Connection status detects has several different methods to realize, easier a kind of method is to realize by RPR agreement topological database.
According to 802.17 standards, safeguarding RPR agreement topological database in the RPR network.In the topological database of a ring, can't find the opposite end to intersect website if intersect website, think that then crossing website and opposite end website are connected disconnection on this ring.Can after finishing, the topology database update of the RPR of each 802.17 standards agreement detect the connection status of two crossing websites; Also can detect the connection status of two crossing websites with predetermined detection periodic queries RPR agreement topological database, proposed schedule sense cycle of the present invention is value between 10 milliseconds to 10 seconds.
When adopting above-mentioned detection method, because the RPR agreement is a mac-layer protocol, so the connection status that is actually the MAC layer that detects.
In the first embodiment of the present invention, two crossing websites are set to static master and slave website.Idiographic flow is as follows:
Two crossing websites are set at home site respectively and from website;
The inner passage that is communicated with home site disconnects the inner passage from website;
When being connected of two crossing websites disconnects at least one ring, be communicated with its inner passage from website;
When the connection of two crossing websites on two rings recovers just often, disconnect its inner passage from website.
In the present embodiment, only unusual in the living topology of two RPR environment-development, during such as home site inefficacy or certain ring disconnection, just can be communicated with from the inner passage between two rings of website.Home site and also can realize which deciding according to priority is home site by the priority of configuring static on two crossing websites from the setting of website.
In the second embodiment of the present invention,, priority realizes dynamic master and slave website by being set.Idiographic flow is as follows:
The first step is provided with the priority of two crossing websites;
In second step, determine that two crossing websites are respectively home site and from website according to priority;
In the 3rd step, the inner passage of connection home site disconnects the inner passage from website;
In the 4th step, when being connected of two crossing websites disconnects at least one ring, rise to home site and be communicated with its inner passage from website; When the connection of two crossing websites on two rings recovers just often, changeed for second step; When the priority of at least one crossing website changes,, changeed for second step if the crossing connection of website on two rings is all normal.
In third embodiment of the invention, intersect between website and notify the opposite end with self state and information change, and respond according to the state variation of the interconnection control frame that receives to the opposite end by the interconnection control frame.Its flow process sees also Fig. 4.
At step S010, the priority of two crossing websites is set.
At step S020, determine that two crossing websites are respectively home site and from website according to priority.
At step S030, be communicated with the inner passage of home site, disconnect inner passage from website.
At step S040, home site E-Packets between two rings.
When being connected between the crossing website disconnected at least one ring, execution in step S050 rose to home site and is communicated with its inner passage from website; Change step S040.
At step S060, detect being connected between the crossing website and recover normal on two rings, should have a crossing website to disconnect its inner passage this moment, so change step S020, redefines the master slave mode of two websites.
When the state information that intersects website changed, execution in step S070 intersected website to the opposite end and sends the interconnection control frame; Change step S040.In the interconnection control frame, comprise priority, master slave mode and other information of transmit leg, in the applied environment of a plurality of examples, comprise that also transmit leg intersects the sign of the affiliated example of website.
Information intersecting the crossing website in storage opposite end on the website comprises master slave mode, priority and MAC Address of opposite end or the like.
At step S080, intersect website and periodically send the interconnection control frame to the opposite end; Change step S040.This step is an optional step.
At step S090, intersect the interconnection control frame that website receives the opposite end.
At step S100, judge in the interconnection control frame to store on client information and this website more whether client information is changed, if having, execution in step S110; If no, abandon this interconnection control frame.If there is not optional step S080, then this step also should be omitted.
At step S110, upgrade to receive store on the crossing website of interconnection control frame to client information.
At step S120, judge whether the master slave mode and the priority of the crossing website in opposite end changes, if having, execution in step S130; If no, change step S040.
At step S130, judge whether the connection of current crossing website on two rings be normal, if, change step S020, redefine the master slave mode of two crossing websites; If not, change step S040.
When the priority of home site changes, and according to the storage from website priority, home site will be judged when this variation will cause the master slave mode of two crossing websites to switch, in step S070, if the connection of current crossing website on two rings is normal, home site drops to active from website, and disconnects its inner passage before sending the interconnection control frame.This also is an optional step, can avoid in the RPR ring course of work, because of change priority causes temporarily occurring the situation that following two the crossing websites of normal topological condition are communicated with the inner passage simultaneously.
The cycle that sends the interconnection control frame among the step S080 can realize by safeguard a timer on crossing website, simultaneously, send the interconnection control frame in succession for fear of arriving because of information change with because of the timer timing, website replacement timer when sending the interconnection control frame because of information change is intersected in order, restarts the timing of transmission cycle.
Present embodiment can realize that the initialization of intersecting interconnection moves automatically.Use for the first time on the website when of the present invention when crossing website starts or intersecting, will intersect the website auto-initiation for from website; When crossing website was received the control frame of opposite end the 1st time after initialization, the information of website was intersected in the storage opposite end, changes step S020, determines its master slave mode according to the priority of two crossing websites.
In the present embodiment, when the connection of two crossing websites on two RPR rings all just often, if the priority of home site is reset, and new priority is lower than the priority from website of storage, then home site drops to earlier from website and breaking inner passage, again to send the interconnection control frame from website; Rise to home site and be communicated with the inner passage after receiving the interconnection control frame behind the website, intersect website to the opposite end and send the interconnection control frame because of its master slave mode changes simultaneously; Dropped to from the original master station point of website receive the interconnection control frame after, it is constant to keep master slave mode.If be re-set as the priority of the home site that is higher than storage, then because of changing to the opposite end, priority sends the interconnection control frame from website from the priority of website; Home site drops to from website and breaking inner passage after receiving the interconnection control frame, intersects website transmission interconnection control frame because of its master slave mode changes to the opposite end simultaneously; The original slave station point rises to home site and is communicated with the inner passage after receiving the interconnection control frame.Be re-set as the value that can not change current master slave mode if intersect the priority of website, the crossing website that then changes priority sends the interconnection control frame to the opposite end; Website is intersected in the opposite end can not send the interconnection control frame to the crossing website of change priority because of information change does not take place; Two crossing websites are all kept current master slave mode.
In 820.17 standards, the RPR control frame frame format that defines in the RPR agreement as shown in Figure 5.The RPR control frame comprises head, load and afterbody, wherein head comprises tt1 (the control frame jumping figure of 1 byte, whenever, subtract 1 through a website), the hec of the extendedControl (expansion control information) of the ttlBase (control frame jumping figure initial value) of the sa (source MAC) of the da (target MAC (Media Access Control) address) of the baseControl (some basic control informations of control frame are as class of service, RPR ring sign etc.) of 1 byte, 6 bytes, 6 bytes, 1 byte, 1 byte and 2 bytes (frame head 16 bit checks with); Load comprises the controlType (control frame type) of 1 byte, the controlVersion (control frame version information) and the adjustable length controlDataUnit (control frame payload, different control frame types have different organization definitions) of 1 byte; Afterbody comprises the fcs (verification and) of 4 bytes.
Only defined 10 kinds in the RPR control frame in 802.17 standards, in other words the value of control frame type controlType has only been used 0x1 to 0xA.Therefore, except self-defined interconnection control frame, the interconnection control frame among the present invention can be realized with the RPR control frame, can utilize the current mechanism of RPR agreement like this.
For example, adopt form shown in Figure 6 as the interconnection control frame payload segment, wherein controlType represents the control frame type, can value be 0xB to 0xF, or other with the RPR network in simultaneously the use the different value of control frame; ControlVersion represent the to interconnect version of control frame form can value be 0 to 255, and the suggestion value is 0; ControlDataUnit takies 3 bytes, and devPriority (the intersecting website priority) expression that comprises the instance identification under instanceID (instance identification) the expression interconnection control frame of 1 byte, 1 byte sends the current master slave mode that the priority value of the crossing site configuration of interconnection control frame, the devStatus of 1 byte (intersecting station state) expression send the crossing website of interconnection control frame.Wherein, the instanceID among the controlDataUnit is provided with in order to have in the network enabled above 1 crossing interconnected Resilient Packet Ring application example, is used for distinguishing different examples.
Among the present invention, can come to determine the master slave mode of two crossing websites in the following manner according to priority: the first relatively priority of two crossing websites, the crossing website with higher priority is a home site, lower priority be from website; When two websites had identical priority, relatively the MAC Address of two crossing websites was a home site with the less crossing website of MAC Address, is home site with the bigger crossing website of MAC Address perhaps, and another is from website.
Figure 7 shows that the structure chart of the crossing interconnection device of the present invention; This crossing interconnect device is applied to intersect two crossing websites on the RPR ring simultaneously.
Parameter configuration module 730 receives the also crossing site parameter of storage input, comprises the master slave mode that intersects website, priority, place instance identification etc.The parameter that intersects the input of interconnection device stopping period is stored, only accept the input of priority intersecting the interconnection device run duration, if the priority of input and last store different are then notified station state processing module 740.The initialization master slave mode that website is intersected in the present invention's suggestion is set to from website.
Connection status detection module 710 periodically detects and stores the connection status of two crossing websites on two rings, if connection status that detects and last store different are then notified station state processing module 740.
Interconnection control frame receiver module 720 receive opposite ends intersect in interconnection control frame that website sends and the storage interconnection control frame to client information, comprise that the opposite end intersects the priority of website, master slave mode, MAC Address etc.If priority or the master slave mode and last store different of website are intersected in the opposite end, then notify station state processing module 740.
The commands for controlling that internal channel control module 750 sends according to station state processing module 740 intersects the inner passage of website, when crossing website connection inner passage during for home site, and breaking inner passage for from website the time.
Station state processing module 740 intersects connection status, this website and the opposite end of website on two rings according to this website and opposite end and intersects the master slave mode that the priority of website determines this website; The connection or the off-state of instruction internal channel control module 750 change inner passages when the master slave mode of this website changes; Instruction interconnection control frame sending module 770 intersects website to the opposite end and sends the interconnection control frame when the master slave mode of this website or priority change.
When station state processing module 740 was received the notice of connection status detection module 710, connection status changed: if two connections of crossing website at least one RPR ring disconnect, then this website rises to home site or continues to remain home site; Recover and connection disconnection on another one RPR ring if two crossing websites connect on a RPR ring, then keep the master slave mode of this website; If two connections of crossing website on two RPR rings are all normal, rise to home site when then the priority of this website is higher than the opposite end or continue to remain home site, the priority of this website drops to slave station point or continues to remain from website when being lower than the opposite end, the MAC Address that compares both sides when the priority of two crossing websites is identical decides the master slave mode of this website.
When station state processing module 740 was received the notice of interconnection control frame receiver module 720, master slave mode or priority that website is intersected in the opposite end changed: if two connections of crossing website at least one RPR ring disconnect, then this website master slave mode is constant; If two connections of crossing website on two RPR rings are all normal, this website rose to home site or remains home site when the priority of this website was higher than the opposite end, this website dropped to from website or remains from website when the priority of this website was lower than the opposite end, when the priority of this website equals the opposite end relatively both sides' MAC Address decide the master slave mode of this website.
When station state processing module 740 is received the notice of parameter control module 730, the priority of this website changes: if this website is a home site, and the priority after changing is lower than opposite end priority, the connection of current two crossing websites on two RPR rings simultaneously is all normal, and this website drops to from website.
Interconnection control frame sending module 770 is filled the interconnection control frame and intersect the website transmission to the opposite end respectively on two RPR ring after receiving instruction.
760 periodic duties of control frame transmission timer, periodically instruction interconnection control frame sending module 770 sends the interconnection control frame, restarts timing when receiving the transmission instruction that station state processing module 740 is issued interconnection control frame sending module 770.This module is optional module.The suggestion span of timer is 100 milliseconds to 10 seconds.
On the crossing website 131 and 132 on the RPR phase cross ring shown in Figure 2, use the present invention, suppose that the priority of the crossing website 131 of configuration is higher than crossing website 132:
When RPR ring 110 and RPR ring 120 were in normal operating conditions, intersecting website 131 be home site, and its inner passage is communicated with, and carries out the message forwarding between RPR ring 110 and 120; Intersecting website 132 is from website, and its inner passage disconnects, and forbids that two messages between the ring are by its forwarding; Like this, the broadcasting packet on each RPR ring can only transfer to another RPR ring by intersecting website 131, owing to can not form forwarding loop and repeating frame thereby broadcast storm can not occurring; In the running, intersect website 131 and crossing website 132 are determined both sides by the topology data storehouse of two rings of periodic queries connection status;
When crossing website 131 lost efficacy in running, two connections of crossing website on two rings all disconnected, and intersected website 132 this moment and rose to home site and be communicated with its inner passage; Message between the RPR ring 110 and 120 is transmitted by intersecting website 132;
If in running, physical link between the website 111 on the RPR ring 110 and website 113, between crossing website 131 and the crossing website 132 all disconnects, because two connections of crossing website on RPR ring 110 disconnect, intersect website 132 and rise to home site and be communicated with its inner passage, intersect website 131 simultaneously and also remain home site; At this moment, the website 113 on the RPR ring 110 is communicated by letter with the website on the RPR ring 120 by intersecting website 132, and the website 111 on the RPR ring 110 is communicated by letter with the website on the RPR ring 120 by intersecting website 131 with website 112.
As seen, the present invention has not only eliminated forwarding loop and the repeating frame that crossing RPR ring causes, and has solved the broadcast storm problem, has realized that at link layer RPR intersects topologic network; The crossing RPR ring link layer that the present invention simultaneously realizes is interconnected in the phase cross ring and occurs still working on when to a certain degree topology is unusual, has high availability; And the fail-over time behind enforcement the present invention is less than 50 milliseconds.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.

Claims (16)

1. the crossing interconnecting method of a Resilient Packet Ring, wherein at least two Resilient Packet Ring have at least two crossing websites that are positioned at simultaneously on described two rings, and crossing website has the inner passage can connect described two rings, it is characterized in that, may further comprise the steps:
A) determine that two crossing websites are respectively home site and from website: with the crossing website with higher priority is home site, and another is from website; If the priority of two crossing websites is identical, the medium access control system MAC Address that then relatively intersects website decides home site and from website;
B) inner passage of connection home site disconnects the inner passage from website;
C) when being connected of two crossing websites disconnects at least one ring, be communicated with its inner passage from website; And, intersect and to send the interconnection control frame between website mutually, comprise the master slave mode that transmit leg is current and the information of priority in the described interconnection control frame, when this priority changes, if it is all normal to intersect the connection of website on described two Resilient Packet Ring, then change step a).
2. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 1, it is characterized in that also comprising: also comprise in the described step c): when being connected of two crossing websites disconnects at least one ring, rise to home site from website;
When the connection of two crossing websites on described two rings recovers just often, change step a).
3. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 2, it is characterized in that:
Sending the interconnection control frame mutually between crossing website is to carry out when the information that comprises master slave mode or priority changes;
Information intersecting the crossing website in storage opposite end on the website comprises its master slave mode and priority;
When crossing website receives that the interconnection control frame of website is intersected in the opposite end, upgrade the information that website is intersected in the opposite end of storing on this website;
When the master slave mode of opposite end website or priority change,, change step a) if it is all normal to intersect the connection of website on described two Resilient Packet Ring; Otherwise do not process.
4. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 3, the priority generation of home site it is characterized in that also comprising: when can cause intersecting the variation of website switching master slave mode, if it is all normal to intersect the connection of website on described two rings, home site is before sending the interconnection control frame from website, drop to from website earlier, and the breaking inner passage.
5. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 4, it is characterized in that also comprising: intersect the website cycle to opposite end crossing website transmission interconnection control frame;
When crossing website is received the interconnection control frame, the opposite end of storing on upgrading this website also comprises before intersecting the information of website: judge store on distance station dot information and this website in this interconnection control frame whether identical, if identical then abandon this interconnection control frame.
6. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 5, it is characterized in that, before described step a), also comprise:
Two crossing websites are initialized as from website;
Crossing website receives opposite end after the initialization when intersecting the 1st interconnection control frame that website sends, and the information that website comprises its master slave mode and priority is intersected in the storage opposite end on this website, and execution in step a).
7. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 6, it is characterized in that also comprising: transmission timer of each crossing station maintenance, the cycle timing that the control frame that is used to interconnect sends;
When sending the interconnection control frame, intersect website replacement transmission timer because of information change.
8. according to the crossing interconnecting method of any described Resilient Packet Ring of claim 3 to 7, it is characterized in that, described interconnection control frame is the RPR protocol control frame, its control types is the reserved value of 802.17 standards, also comprises control frame version and described two instance identification of ring in network that intersect interconnection in the interconnection control frame.
9. according to the crossing interconnecting method of any described Resilient Packet Ring of claim 1 to 7, it is characterized in that also comprising: intersect the topological database of described two Resilient Packet Ring of website periodic queries, intersect the connection status of website on described two Resilient Packet Ring to check with the opposite end;
The topological database that described periodic queries is included in described two Resilient Packet Ring upgrades the inquiry of end back at every turn, or with the predetermined detection cyclic polling.
10. according to the crossing interconnecting method of the described Resilient Packet Ring of claim 9, it is characterized in that: value between 10 milliseconds and 10 seconds of described predetermined detection cycle; The described link layer that is connected to connects.
11. an application rights requires the crossing website of 1 described method, intersecting website with the opposite end is positioned on two Resilient Packet Ring simultaneously, it is characterized in that comprising crossing interconnection device, described crossing interconnection device comprises connection status detection module, parameter configuration module, interconnection control frame receiver module, station state processing module, internal channel control module and interconnection control frame sending module, wherein:
The connection status detection module periodically detects and stores the connection status of two crossing websites on two rings, notice station state processing module when connection status changes;
The crossing site parameter that comprises master slave mode and priority that parameter configuration module receives and storage is imported, notice station state processing module when the priority of input changes;
Interconnection control frame receiver module receive the opposite end intersect interconnection control frame that website sends and storage wherein comprise priority and master slave mode to client information, intersect the priority of website or master slave mode notice station state processing module when changing in the opposite end;
Internal channel control module intersects the inner passage of website according to the commands for controlling of station state processing module, when crossing website connection inner passage during for home site, and breaking inner passage for from website the time;
The station state processing module intersects connection status and the priority master slave mode that determine this website of website on two rings according to this website and opposite end, this website was a home site when wherein the connection at least one ring disconnected, and the connection on two rings all just often determines this website and opposite end to intersect that website is respectively home site and from website according to priority; The instruction internal channel control module is communicated with or the breaking inner passage when the master slave mode of this website changes, and instruction interconnection control frame sending module intersects website to the opposite end and sends the interconnection control frame when the master slave mode of this website or priority change;
Interconnection control frame sending module is being received the instruction back to opposite end crossing website transmission interconnection control frame.
12. according to the described crossing website of claim 11, it is characterized in that, described crossing interconnection device also comprises the control frame transmission timer, periodically instruction interconnection control frame sending module sends the interconnection control frame, restarts timing when receiving the instruction that the station state processing module is issued interconnection control frame sending module.
13., it is characterized in that described station state processing module intersects connection status and the priority master slave mode that determine this website of website on two rings according to this website and opposite end and is specially according to the described crossing website of claim 12:
When receiving the notice of connection status detection module, if two connections of crossing website at least one ring disconnect, then this website is a home site; If two connections of crossing website on two rings are all normal, this website was a home site when then priority was higher than the opposite end, this website was from website when priority was lower than the opposite end, and the MAC Address that compares both sides when priority equals the opposite end decides the master slave mode of this website;
When receiving the notice of interconnection control frame receiver module, if two connections of crossing website at least one ring disconnect, then this website master slave mode is constant; If two connections of crossing website on two rings are all normal, this website was a home site when then priority was higher than the opposite end, this website was from website when priority was lower than the opposite end, and the MAC Address that compares both sides when priority equals the opposite end decides the master slave mode of this website;
When receiving the notice of parameter configuration module, if the priority after changing is lower than the opposite end, all normal and this website of the connection of current two crossing websites on two rings simultaneously is a home site, and then this website drops to from website.
14. crossing Resilient Packet Ring, comprise at least two crossing websites, the inner passage of a crossing website is in open mode to realize two messages forwardings between the ring in described two crossing websites, it is characterized in that: described another crossing website forbids that two messages between the ring transmit to prevent broadcast storm by its inner passage, and, the crossing website that the inner passage is in open mode is a home site, and crossing website in addition is from website;
Send the interconnection control frame between described crossing website mutually, comprise the master slave mode that transmit leg is current and the information of priority in the described interconnection control frame, when this priority changes, if the crossing connection of website on described two Resilient Packet Ring is all normal, then:
With the crossing website with higher priority is home site, and another is from website; If the priority of two crossing websites is identical, the medium access control system MAC Address that then relatively intersects website decides home site and from website.
15., it is characterized in that when the connection of described two crossing websites on some rings interrupted, described another crossing website was opened its inner passage according to the described crossing Resilient Packet Ring of claim 14.
16., it is characterized in that described two crossing websites are by the topology data storehouse of two rings of periodic queries or regularly send the interconnection control frame to determine both sides' connection status according to the described crossing Resilient Packet Ring of claim 14.
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CN101582848A (en) * 2009-06-18 2009-11-18 中兴通讯股份有限公司 Cross-ring protection method and system of resilient packet ring (RPR)
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