CN101582857B - Data upper ring forwarding method based on elastic grouping ring and device - Google Patents
Data upper ring forwarding method based on elastic grouping ring and device Download PDFInfo
- Publication number
- CN101582857B CN101582857B CN2009101500687A CN200910150068A CN101582857B CN 101582857 B CN101582857 B CN 101582857B CN 2009101500687 A CN2009101500687 A CN 2009101500687A CN 200910150068 A CN200910150068 A CN 200910150068A CN 101582857 B CN101582857 B CN 101582857B
- Authority
- CN
- China
- Prior art keywords
- ring
- forward mode
- mode
- data
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Small-Scale Networks (AREA)
Abstract
The invention provides a data upper ring forwarding method based on an elastic grouping ring and a device. The method includes the steps: a control engine sets up a protected mode mark and a forwarding mode mark according to the topology state of the elastic grouping ring, and when the topology state of the elastic grouping ring changes, the forwarding mode mark indicates a flood forwarding mode; a data engine identifies a forwarding mode according to the forwarding mode mark and identifies a protected mode according to the protected mode mark, and when the forwarding mode is the flood forwarding mode, the protected mode is a switching protected mode, the flood forwarding mode is adopted to conduct the upper ring forwarding of data on two rings; and when the forwarding mode is a flood forwarding mode, the protected mode is a loop protected mode, the flood forwarding mode is adopted to conduct the upper ring forwarding of data on one ring. The embodiment of the invention can complete the topology updating more quickly without affecting the forwarding speed.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of data upper ring forwarding method and device based on Resilient Packet Ring.
Background technology
Along with the rapid expansion of data service, the data-handling capacity of metropolitan area network becomes the focus that everybody pays close attention to.But no matter be IP over ATM (transmitting IP on the asynchronous transfer mode) or IP over is SDH (transmitting IP on the SDH (Synchronous Digital Hierarchy)), weak point is separately all arranged.For some limitations of the SDH, the ATM that solve fairly large application in the metropolitan area network and ethernet technology, a kind ofly brought into schedule for the new mac-layer protocol RPR (Resilient Packet Transport) of optimizing the IP data packet transmission.
Resilient Packet Ring (RPR, Resilient Packet Ring) technology is based on the broadband IP MAN technology of data, it is a kind of novel mac-layer protocol that data service transmits of on loop configuration, optimizing, multiple physical layer (as SDH, Ethernet, dense wave division multipurpose (DWDM) etc.) can be adapted to, multiple business types such as data, speech, image can be transmitted effectively.The RPR technology integrates the intellectuality of IP, the economy of Ethernet and high bandwidth efficiency, the reliability of optical fiber ring network, for broadband IP metropolitan area network operator provides a good networking plan.The RPR looped network has the fastext recovery capability of SDH/SONET (Synchronous Optical Network) concurrently, and the bandwidth of Ethernet is used validity.In addition, also has the whole network balanced bandwidth mechanism.
RPR adopts the dicyclo topological structure of two loops with forward and recycled back, and every loop all is made up of link (link), and the data on the link all transmit along equidirectional.Two loops are masked as loop 0 (ringlet0) and loop 1 (ringlet1) respectively, as shown in Figure 1.The part section of being called (span) on the loop between the adjacent node, section is made up of two rightabout one group of one way link.
At the RPR data transmission procedure, the RPR node has the basic operation of data: go up ring (Insert), following ring (Copy), transmit (Transit) and peel off (Strip), wherein, last ring is meant that node device is inserted into the data that forward from other interfaces the data flow of RPR ring; Following ring is meant that node device receives data from the data flow of RPR ring, give the father of node and handle accordingly; Forwarding is meant that the data forwarding that will receive from upstream node is to downstream node; Peel off the data that are meant receiving and abandon, no longer be transmitted to downstream node from upstream node.
The transmission of the last data of RPR comprises directional transmissions (Directed Transmission) and non-directional transmission (Undirected Transmission) two kinds.Data send to the transmission means of single goal node the RPR directional transmissions in the non-mode of flooding; Data send to a plurality of destination nodes in the mode of flooding transmission means is transmitted the RPR non-directional.As shown in Figure 2, node S1 sends to the S3 node by the non-mode that floods with data, and data are by way of node S2, and node S2 only transmits, and will duplicate no longer downstream when node S3 receives these data again and send these data.As shown in Figure 3, node S1 adopts the mode that floods to send data on the loop 0 (ringlet0), data are duplicated and are transmitted downstream by other nodes except the S1 node, all non-S1 nodes on the ring all will be received the data that S1 sends like this, when data arrived S1 on ring 0, S1 removed data from loop 0 (ringlet0).The transmission of clean culture, multicast and broadcast data, and do not have inevitable corresponding relation between directed, the nondirectional transmission means.The RPR node that receives data if desired is unique and known, then adopts the directional transmissions mode to send data; Otherwise, then adopt the non-directional transmission means to send data.Multicast is adopted the non-directional transmission means usually with broadcasting, but also can adopt the directional transmissions mode.
The dicyclo topological structure of RPR has guaranteed can have the path of another replacement between source node and destination node when certain section of a loop or node failure.During loop fault, RPR MAC layer can support at the transparent transmission (Passthrough) of RPR intra-node fault with at the protection of loop fault, wherein comprises at the protection of loop fault and switches (steering) protection and loopback (wrapping) is protected.
Last all nodes of RPR are all supported the reversing protection, and the protection type of ring is for switching when protection is switched in all nodes employings.Switch in use on the ring of protection, flow begins to be dropped at the node adjacent to failpoint.For avoiding continuous abandoning, source node is switched on the another one ring that is connected with destination node by the flow with clean culture, sends.The flow of multicast and broadcasting generally can transmit on two rings, thereby can arrive each node.Shown in Fig. 4 A, when the RPR ring was in the closed loop state, S1 issued the data of S3, sent by encircling 0, by way of S2.Edge (Edge) appears between S2 and S3, promptly be in open loop situations, S2 and S3 propagate this information immediately to whole net, after S1 receives this information, stop data and send, after treating that RPR ring topology is in stable condition, promptly all nodes are all known this Edge information, and mutual topology data good synchronously after, S1 changes into by encircling 1 and sends data to S3, by way of S6, S5, S4, shown in Fig. 4 B.
Last all nodes of RPR all can be selected the loopback protection, and when all nodes adopted the loopback protection, the protection type of ring was a loopback.On the ring that uses the loopback protection, protected flow is looped back on the opposite ring at failpoint.Loopback is transparent to source node, under the situation that single node lost efficacy, still can keep the connectedness to all nodes.Shown in Fig. 5 A, normal condition, the RPR ring is in the closed loop state, and S1 sends data by ring 0 to S4, transmits through S2, S3, arrives S4 from encircling 0.The edge appears between S2, S3; S2, S3 enter the loopback protected mode immediately, and S1 sends data by ring 0 to S4 as usual, and data are by way of S2 the time; obtain the loopback protection of S2; S2 does loopback operation for the first time to data, and data enter ring 1 transmission, arrive S3 through S1, S6, S5, S4 transparent transmission; S3 carries out the loopback operation second time; data are got back to ring 0, arrive S4 from encircling 0, shown in Fig. 5 B.Wherein at ring 1 when the source node S 1, Frame is stamped " through the source node sign " (PS=1) by S1, this sign prevent data at two interannular loopbacks above twice.
RPR MAC layer is supported chain of command and data surface function.Among the application; the processing unit that carries out chain of command functions such as the fair control of RPR protocol definition, topological protection, Topology Discovery, Operation Administration and Maintenance in the RPR MAC layer is called Control Engine, the processing unit of realizing data surface functions such as loop selection, data encapsulation, data opening is called data engine.
Node on the RPR ring is with data upper ring and clean culture transmission data the time, when sending the Ethernet message as clean culture, mainly finish the encapsulation of message, but the various question blanks that data engine need be inquired about when transmitting are by Control Engine setting and modification by data engine.Described various question blank comprises: select the ring table, transmit, topology table and other nonproductive poll tables etc.Wherein, select the ring table to be used to select the ring operation, for example can select certain Ethernet message to encircle 0 and still encircle 1 transmission according to user's choosing ring configuration information from RPR.If the user does not select the ring configuration information, then can dynamically select ring according to the RPR network topological information, also can select the environment-development literary composition of delivering newspaper by acquiescence, it is 0 also can be 1 ring that acquiescence can be provided with.Transmit and be used for determining that according to MAC Address and/or vlan (VLAN) information message arrives the pairing jumping figure of other node.Transmit the forwarding-table item and RPR SAS (spatial perception subgrade) the module forwarding-table item that study is obtained according to source address that can comprise manual configuration.The jumping figure (hops) that topology table goes up other nodes with the ring sign (ri) and the local node of the ring of selection to this ring is the topology information of node on the index record ring, for transmitting, from topology table mainly obtain the mac address information of RPR node and up till now node from encircling 0 or encircle 1 reachability information.The accessibility of switching data among the corresponding RPR of protection is obtained by following method: when not having the edge in loop, source node and destination node are flagged as in loop and can reach; When in loop the edge being arranged, source node, otherwise is labeled as ring 0 or encircles 1 unreachable along ring 0 or encircle and be flagged as ring 0 when not needing through the edge on 1 or encircle 1 and can reach to destination node.The accessibility of data all is changed to and can reaches the effective nodes of all topologys among the RPR of loopback protection correspondence.Other nonproductive poll tables for example comprise the table etc. of finishing message service type inquiry according to the 801.1Q priority of messages.
Under the topological stable situation of RPR, be in open loop stabilization state or closed-loop stabilization state as RPR, to send processing procedure be a kind of forwarding process of tabling look-up in environment-development on the message: can determine by searching each question blank whether destination node can reach, if destination node is unreachable, dropping packets, if destination node can reach destination address and other information of encapsulated message, send this RPR message.The flow process of wherein searching various question blanks for example comprises: (1) is searched and is selected the ring table, determine that message is to send from 0 ring or 1 environment-development, and the ring that record is selected identifies.(2) search and transmit, obtain the corresponding jumping figure information that message should send to certain node on the ring, and write down this jumping figure information.(3) search topology table,, obtain the MAC Address of destination node and the reachability information of destination node according to the ring sign of record and the jumping figure information searching topology table of destination node.
Above-mentioned only is message transmission flow under the RPR topology stable case; when the ring upper topology changes; the node of finding Edge on the ring will send TP (Topology Protection with broadcast mode on two rings; the topology protection) frame carries out the change in topology announcement, and ring is gone up all nodes and can be received the TP frame timely like this.Each node control engine is according to the TP frame of receiving on the ring, the topological list item of corresponding modification this locality, and after waiting topological database to revise to finish and verify that topology is stable, topology is just really thought stable state, just can carry out the inquiry of topology table at this moment.
Suppose in a stable closed loop topology, edge, one place (Edge) has appearred on the ring, as Fig. 6, all nodes all need be revised local topological database by Control Engine on the ring when having known this Edge, if current ring has 255 RPR nodes (255 RPR nodes of the maximum support of agreement).Then in local topology database, just there are 509 (254*2+1) list items, and need to revise the accessibility of 255 list items.
But Control Engine and data engine cooperate the scheme that realizes RPR MAC to have a common problem, are exactly that data engine will be locked to the list item of the table looked into when forwarding process is tabled look-up in execution, and when list item was not locked, list item just can the Be Controlled engine adapts.Because the Query Result of general list item all needs repeatedly internal storage access could all obtain data, to list item lock can table look-up obtain data in the list item do not finish before, guarantee that data are not modified.Because all control informations on the RPR ring are all handled by Control Engine, when Control Engine is received the announcement of a change in topology, will revise the topology table that data engine uses, if the lot of data forwarding of will tabling look-up is arranged this moment, topology table will can't be upgraded within a certain period of time because data forwarding is tabled look-up to the locking of list item.
The failure response mechanism of RPR requires the service disruption should be within 50ms, and this index loop data on high speed just is difficult to reach when transmitting.Simultaneously, because generation Edge and modification list item can not be finished in the ring at once, the message that will cause some to arrive the Edge downstream may still can arrive when searching old topological database, but message is sent on the ring and finally still is dropped, it has but wasted the processor resource of data engine and the bandwidth on the ring, is equivalent to do idle work.A kind of simple solution is temporarily to suspend forwarding of data, makes data engine not carry out table lookup operation, revises and to allow message forwarding to handle after list item finishes again etc. Control Engine.Transmit the very short time though just suspend, whole net will all not have data forwarding at this section in the period, be not a kind of acceptable method therefore.Another kind method is to keep two same databases in system, be called A and B respectively, when needs are revised the database list item, table lookup operation when making data engine continue to use the current database A that is using to transmit, Control Engine is revised other a database B simultaneously, after modification finished, data engine switched to the table lookup operation to new database B rapidly, and Control Engine just can continue to revise the first piece of data storehouse A like this.But the drawback of this method is all will use old database with causing before having revised data B message to be transmitted, thereby may cause the message transmission not conform to the actual conditions.
Generally speaking, if node a lot (the topological list item that will revise when being change in topology is just many) and under situation about transmitting at a high speed (data engine table look-up at this moment forwarding and data table items locked) on the RPR looped network, Control Engine can't in time be finished the renewal of topology table, and data engine can't in time use new topology table to carry out data forwarding.Just can't in time finish the renewal of topological list item, will directly influence the 50ms protection index of recovery time.
Summary of the invention
Because problems of the prior art, the main purpose of the embodiment of the invention is to provide a kind of data upper ring forwarding method and device based on Resilient Packet Ring, upgrades can finish topology more apace when not influencing forwarding rate.
To achieve these goals, the embodiment of the invention provides a kind of data upper ring forwarding method based on Resilient Packet Ring, comprising:
Control Engine is provided with the protected mode sign, and according to the topological state of described Resilient Packet Ring the forward mode sign is set, and when the topological state of Resilient Packet Ring changed, described forward mode sign was indicated the forward mode that floods;
Data engine is according to described forward mode sign identification forward mode, according to protected mode sign identification protecting pattern, forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
The embodiment of the invention provides a kind of data upper ring forwarding method based on Resilient Packet Ring in addition, comprising:
Control Engine is provided with protected mode sign, two maximum hop count variablees and according to the topological state of described Resilient Packet Ring the forward mode sign is set, wherein said two maximum hop count variablees are represented the jumping figure of the node farthest that the data of source node transmission can arrive respectively on two rings, at the topological state of described Resilient Packet Ring is that website does not have increase and decrease only because node accessibility changes when changing on stable state or the ring, and described forward mode sign is indicated the forward mode of tabling look-up;
Described data engine is according to described forward mode sign identification forward mode; according to protected mode sign identification protecting pattern; at described forward mode when tabling look-up forward mode; the choosing of tabling look-up encircles and obtains the jumping figure information that arrives destination node on the selected ring, carries out the upward ring of data according to the relation of the jumping figure information that arrives this destination node maximum hop count variable corresponding with being somebody's turn to do selected ring and transmits.
The embodiment of the invention also provides a kind of data upper ring retransmission unit based on Resilient Packet Ring, comprising: Control Engine and data engine;
Described Control Engine is used to be provided with the protected mode sign, and according to the topological state of described Resilient Packet Ring the forward mode sign is set, and when the topological state of Resilient Packet Ring was the state that changes, described forward mode sign was indicated the forward mode that floods;
Described data engine is used for according to described forward mode sign identification forward mode, according to protected mode sign identification protecting pattern, forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
The embodiment of the invention also provides a kind of data upper ring retransmission unit based on Resilient Packet Ring, comprising: Control Engine and data engine; Described Control Engine comprises that sign is provided with the unit;
Described sign is provided with the unit and is used to be provided with protected mode sign, two maximum hop count variablees and according to the topological state of described Resilient Packet Ring the forward mode sign is set, wherein said two maximum hop count variablees are represented the jumping figure of the node farthest that the data of source node transmission can arrive respectively on two rings, at the topological state of described Resilient Packet Ring is that website does not have increase and decrease only because node accessibility changes when changing on stable state or the ring, and described forward mode sign is indicated the forward mode of tabling look-up;
Described data engine is used for according to described forward mode sign identification forward mode; according to protected mode sign identification protecting pattern; at described forward mode when tabling look-up forward mode; the choosing of tabling look-up encircles and obtains the jumping figure information of destination node on the selected ring, carries out the upward ring forwarding of data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select.
The embodiment of the invention can be finished topology more apace and upgrade when not influencing forwarding rate, thereby guarantees to utilize new topological state to transmit processing as early as possible.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of RPR looped network;
Fig. 2 is the schematic diagram of message directional transmissions on the RPR ring;
Fig. 3 is the schematic diagram of message non-directional transmission on the RPR ring;
Fig. 4 A is the transmission schematic diagram of data message between S1 and the S3 node when switching closed loop under the protected mode;
Fig. 4 B is the transmission schematic diagram of data message between S1 and the S3 node when switching open loop under the protected mode;
Fig. 5 A is the transmission schematic diagram of data message between S1 and S4 node during closed loop under the loopback protected mode;
Fig. 5 B is the transmission schematic diagram of data message between S1 and S4 node during open loop under the loopback protected mode;
Fig. 6 is the RPR ring structure schematic diagram when the edge occurring;
Fig. 7 is the data upper ring forwarding process schematic diagram of the embodiment of the invention 1;
Fig. 8 carries out the process chart of data forwarding for data engine in the embodiment of the invention 1;
Fig. 9 is the data upper ring forwarding process schematic diagram of the embodiment of the invention 2;
Figure 10 carries out the process chart of data forwarding for data engine in the embodiment of the invention 2;
Figure 11 is the data upper ring retransmission unit schematic diagram of the embodiment of the invention 1;
Figure 12 is the data upper ring retransmission unit schematic diagram of the embodiment of the invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Upgrade because prior art can't be finished topology when data upper ring is transmitted at a high speed, the embodiment of the invention will propose concrete solution at this problem.
The embodiment of the invention provides a kind of data upper ring forwarding method based on Resilient Packet Ring, and as shown in Figure 7, this method comprises the steps:
When the topology of Resilient Packet Ring changed, described forward mode sign was indicated the forward mode that floods.
For example, Control Engine can be provided with a current ring protection pattern identification, for example protects tag along sort (protect_class_tag), for switching protected mode, protect_class_tag=true can be set; For the loopback protected mode, protect_class_tag=false can be set.
In addition, Control Engine can also be provided with a forward mode sign according to the topological state of described Resilient Packet Ring, as the label that floods (flood_tag), when receiving the TP frame of announcement ring change in topology in this locality, and the topological state of RPR is when being the state that changes, Control Engine is provided with this flood_tag=true at once, is used for representing that current topology table is invalid, and the corresponding forward mode of indication is the forward mode that floods.
In the embodiment of the invention; described protected mode sign and forward mode sign can be provided with and be kept in the data engine; also can be provided with and be kept at other any positions that data engine can be visited, data engine is visited this position can obtain the parameter that Control Engine is provided with.
For example, data engine can be discerned the value of the label that floods and is that the true decision is adopted the mode that floods to send to encircle message according to the value of this label that floods on transmitting during the ring message.Simultaneously, can discern the protected mode of current ring, thereby selection is to flooding on the ring or flood transmission simultaneously on two rings according to the protected mode sign of current ring.For example, switching under the protected mode, can both receive message one time in order to make each node, data engine sends once this message simultaneously to two rings; And, only on a ring, send a message for the loopback protected mode, just can make each node can both receive message.
In the existing forwarding scheme of tabling look-up, searching topology table is to come encapsulated message for the RPR MAC Address of obtaining destination node, and when the employing mode of flooding sends, it is 1 that a fi that floods who is provided with in the Frame is adopted in the RPR standard code, fi=1 promptly is set, and floods and send to adopt broadcast address as the destination address encapsulated message, this moment, each node all can receive portion when receiving the frame of fi=1, and continue to send this frame to the downstream of this ring, arrive source node and be dropped up to frame.Send like this when going up loop data, because in fact need not search the RPR MAC Address that topology table is obtained destination node again, so this state is revised the just success certainly of content of topology table down.
By as above step, can when not influencing forwarding rate, finish topology more apace and upgrade, and networking can the support node number reach the maximum of agreement regulation during the hardware plan that can also guarantee to state in the use.
In actual applications, the embodiment of the invention also can comprise: when the topological state of described Resilient Packet Ring is stable state, described forward mode sign is set indicates the forward mode of tabling look-up.
For example, after the topology renewal finished, Control Engine flood_tag was set to false, represented that current topology table renewal finishes, and the corresponding forward mode of indication is the forward mode of tabling look-up, and can carry out the transmission of message by the pass-through mode of tabling look-up normally.
Correspondingly, the embodiment of the invention also can comprise:
Data engine carries out the ring of going up of data and transmits according to the described forward mode of tabling look-up by tabling look-up.
When the value of data engine identification flood_tag was false, the mode that will stop to adopt the mode of flooding to adopt and table look-up to transmit sends encircled message.
The flow process transmitted of tabling look-up can same prior art, obtains the RPR MAC Address of destination node and comes encapsulated message comprising searching topology table, does not repeat them here.
The scheme of present embodiment relates to two variable: flood_tag and protect_class_tag, and the value of these two variablees is respectively as forward mode sign and protected mode sign, particularly:
(1)flood_tag：
Flood_tag=True represents that current topology changes, and the indication forward mode is the forward mode that floods, and promptly needs data engine need adopt the mode that floods to send for the message of last ring.
Flood_tag=False represents that current topology is a stable state, and the indication forward mode is the forward mode of tabling look-up, and promptly needs data engine to transmit by the inquiry topology table.
(2)protect_class_tag：
Protect_class_tag=true represents when Flood_tag==true, and protected mode is for switching protected mode, the data engine transmission message that should flood on two rings.
Protect_class_tag=false represents that when flood_tag=true protected mode is the loopback protected mode, and data engine can be to the environment-development literary composition of delivering newspaper.
In the embodiment of the invention, when flood_tag=False, no matter the value of protect_class_tag why, all carries out the forwarding of message data by the flow process of tabling look-up.
Fig. 8 is in the embodiment of the invention, and data engine carries out the process chart of data forwarding.This flow process comprises the steps:
Step 210 is searched and is selected the ring table, and selecting message to return from 0 environment-development is to send from 1 environment-development, and the value of the ring that will select is kept at the ring sign, and (ring identification is ri) in the variable.
Step 220 is searched and is transmitted, and obtains the corresponding jumping figure information that message should send to certain node on the selected ring, and this jumping figure information is kept at hops[ri] in the variable.
Step 230 is according to ri and hops[ri] search topology table, obtain the MAC Address and the reachability information of destination node.
Step 240 judges that whether destination node can reach, if destination node can reach, then enters step 260, otherwise enters step 250.
Step 280 determines with the target MAC (Media Access Control) address to be broadcast address, sends message to two rings in the mode of flooding, and enters step 260.
Step 290 determines with the target MAC (Media Access Control) address to be broadcast address, sends message on selected ring, and enters step 260.
As can be known above-mentioned, new data upper ring forwarding method of the invention process can encircle forwarding and not guarantee to finish in the 50ms renewal of topology table simultaneously with not being interrupted, thereby utilize new topological state to transmit processing on high speed.
In embodiment 1, though can finish topology when not influencing forwarding rate more apace upgrades, but because it adopts the mode that floods, if all such the flooding when carrying out topological renewal of each node will increase the consumption of bandwidth on the whole ring undoubtedly on the ring when sending.
For this reason, present embodiment provides a kind of data upper ring forwarding method based on Resilient Packet Ring in addition.This method is removed the node accessibility variable in the topology table and is adopted two variablees to write down the jumping figure of the node farthest that local node sends from two rings under the current topological state message can arrive on the basis of embodiment 1.Control Engine when topological state upgrades is as long as upgrade these two variate-values, and the accessibility token variable that does not upgrade all relevant topological list items comes the indirect quick renewal of finishing the ring topology.
In order to understand present embodiment better, at first following classification is at length carried out in the renewal of topology table:
1, node is constant on the ring, is entered open loop and is in now by closed loop and switch protected mode.
In this case, protected mode is for switching, and the node on the ring not have variation, only has accessibility (reachable) change of node.
2, node is constant on the ring, is entered open loop and is in the loopback protected mode now by closed loop.
In this case, protected mode is a loopback, and the node on the ring does not have the accessibility of variation, node not have change yet.
3, node is constant on the ring, is entered closed loop and originally is in by open loop and switch protected mode.
In this case, original protected mode is for switching, and the node on the ring does not have variation, only has an accessibility change of node.
4, node is constant on the ring is entered closed loop and originally was in the loopback protected mode by open loop.
In this case, original protected mode is a loopback, and the node on the ring does not have the accessibility of variation, node not have change yet.
5, node has change on the ring
Promptly the node on the ring has increases or reduces, and in this case, may all there be mistake in all topology table list items, and it is nonsensical from then on to show the search purposes MAC Address.Message transmit operation this moment can be as follows, send by the acquiescence environment-development for the open loop loopback mode, and all message acquiescence choosing rings all are 0 or all are 1.Send message for the open loop Switch mode simultaneously to two rings.
Because except the 5th kind of situation, other situation at most just has only the node accessibility mark for the renewal of topology table.All having defined a variable in the list item of the topology table of RPR protocol definition is used to write down this node and encircles the accessibility that goes up between other node, in the present embodiment local node and the accessibility record variable that ring is gone up other nodes are deleted from each topological list item, and by the maximum hop count variable of two rings is set, as MAX_HOPS[ri], solve the problem that accessibility is judged, indirect finished the purpose that topological database upgrades about node accessibility, wherein the value of ri is respectively the sign of two rings, as 1 and 0.The maximum hop count variable of these two rings is as MAX_HOPS[0] and MAX_HOPS[1], the jumping figure value of the local node of RPR farthest on accessibility this ring on ring 0 and the ring 1 write down under the current topological state respectively.The Control Engine variation that also will draw topology from the topology received announcement frame is any the above-mentioned situation in addition:
If situation 1 or 3; promptly switch the situation of protection; Control Engine can be provided with global mark flood_tag=false in data engine; identify as the message forward mode; ring message forwarding pattern is the forward mode of tabling look-up in the indication; should enter " forwarding process of tabling look-up ", and protected mode sign protect_class_tag=true is set, if show that message can't arrive from some rings then should be from another ring transmission according to the current protected mode of switching.
If situation 2 or 4; it is the situation of loopback protection; Control Engine can be provided with global mark flood_tag=false in data engine; identify as the message forward mode; ring message forwarding pattern is the forward mode of tabling look-up in the indication, should enter " forwarding process of tabling look-up ", and according to current loopback protected mode protect_class_tag=false is set; send not directly arrival if show message from some environment-development, but got back to another ring by edge place node cycle after, can reach.
If situation 5, Control Engine is provided with global mark flood_tag=true in data engine, identify as the message forward mode, ring message forwarding pattern is the forward mode that floods in the indication, show that the ring message should enter " forwarding process floods ", and protect_class_tag is set according to current protected mode, for example: protect_class_tag=true is set switching under the protected mode, shows the transmission message that on two rings, flood; Under the loopback protected mode, protect_class_tag=false is set, send not directly arrival if show message from some environment-development, but got back to another ring by edge place node cycle after, can reach, promptly only need on a ring, flood the transmission message.
The setting that regards to two MAX_HOPS values is given an example down, have 255 nodes as RPR looped network among Fig. 6, suppose local node position s0, and Edge occurred between s4 and the s5 that Control Engine has been the value of these two variablees just to the renewal of topology after this node has been received topological announcement frame.
If situation 1 and situation 3 are encircled to switching protected mode, the node farthest that s0 can arrive on the ring 0 in the stable topology is s4, promptly encircles 0 MAX_HOPS[0]=4; And encircle the node that local node s0 can arrive on 1 is s5, promptly encircles 1 MAX_HOPS[1]=251.
If situation 2 and situation 4, to encircle and be the loopback protected mode, two MAX_HOPS values all are set to 255, and the maximum node number of promptly current RPR ring is because under the loopback ring protection pattern, all nodes all can reach.
In the embodiment of the invention; the parameter that Control Engine is provided with; as protected mode sign, forward mode sign and two MAX_HOPS values; both can be kept in the data engine; also can be kept at other any positions that data engine can be visited, data engine is visited this position can obtain the parameter that Control Engine is provided with, therefore; though present embodiment is so that the explanation that above-mentioned parameter carries out to be set in Control Engine, the embodiment of the invention is not limited to this.
Based on above-mentioned analysis, as shown in Figure 9, the data upper ring forwarding method based on RPR that present embodiment provides comprises the steps:
In this step, when the topological state of described Resilient Packet Ring changes owing to the increase of node or minimizing, flood_tag=true, the designation data forward mode is the forward mode that floods;
Protect_class_tag=true is set switching under the protected mode;
Under the loopback protected mode, protect_class_tag=false is set.
Can find out according to as above step, in the embodiment of the invention, because the increase and decrease of node when causing topological state to change, the ring of going up that adopts the mode of flooding to carry out data is transmitted, and can guarantee to finish more apace when not influencing forwarding rate the topology renewal for RPR ring.
In concrete application of the present invention, also comprise the steps:
At this moment, step 310 also comprises, be stable state or the increase of not having node or only reduce at the topological state of described Resilient Packet Ring because node accessibility variation when changing, described forward mode sign is set indicates the forward mode of tabling look-up, for example: flood_tag=false, the designation data forward mode is the forward mode of tabling look-up.
In the present invention's one concrete application, the ring forwarding of going up of carrying out data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select comprises:
At the jumping figure of the described destination node maximum hop count variable greater than described selected ring correspondence, and protected mode is designated as when switching protected mode, and data are switched on another ring, carries out the ring of going up of data by the MAC Address of destination node in the topology table and transmits.
In the embodiment of the invention; when protected mode is the loopback protected mode; because MAX_HOPS[0], MAX_HOPS[1] value all be the number of all nodes on the RPR; the jumping figure that destination node therefore can not occur is greater than the situation of the maximum hop count variable of described selected ring correspondence; the jumping figure that promptly always satisfies destination node is less than or equal to the maximum hop count variable of described selected ring correspondence; this moment, data engine can be according to the sign ri and the hops[ri of selected ring] search topology table; obtain the MAC Address of destination node, and encapsulate transmission.
Comprehensively noted earlier, the implication of three variate-values that present embodiment relates to is as follows:
(1)Flood_tag：
Flood_tag=true represents current topology owing to the increase or the minimizing of node change, and data engine need adopt the mode that floods to send for the message of last ring.
Flood_tag=false represents that current topology is stable state or the increase of not having node or only reduces because node accessibility changes changes that data engine is transmitted by inquiring about topology table.
(2)protect_class_tag：
The protected mode of protect_class_tag=true representative ring is for switching protected mode:
When Flood_tag==true, the transmission message should flood on two rings.
When Flood_tag==false, message should be switched to another ring clean culture and send behind the ring that inquires.
The protected mode of protect_class_tag=false representative ring is the loopback protected mode:
When Flood_tag==true, should be to the ring transmission message that floods.
When Flood_tag==false, all be maximum node number (255) because two MAX_HOPS values are set under the loopback protected mode, so the combination of this kind condition is impossible occur.
(3) MAX_HOPS: comprise two variablees, indicate the jumping figure of the node farthest that the message that sends at this node on two rings can arrive respectively on two rings.
Figure 10 carries out the process chart of data forwarding for data engine in the present embodiment.This flow process comprises the steps:
Step 401 is searched and is selected the ring table, and selecting message to return from 0 environment-development is to send from 1 environment-development, and the value of the ring that will select be kept at the ring marking variable (ring identification, ri) in.
Step 402 is searched and is transmitted, and obtains the corresponding jumping figure information that message should send to certain node on the selected ring, and this jumping figure information is kept at jumping figure variable hops[ri] in.
Step 403 is judged hops[ri] whether be less than or equal to corresponding maximum hop count variable MAX_HOPS[ri], if enter step 404; If not, enter step 406.
Step 404 is according to ri and hops[ri] search topology table, obtain the MAC Address of destination node.
Step 406 judges whether protect_class_tag=true, if then enter step 408; If otherwise enter step 407.
Step 408 is according to ri and hops[ri] search topology table, obtain the MAC Address of destination node.
Step 409 is made to message on another ring, and forwards step 405 to.
Step 410 judges whether protect_class_tag=true, if then enter step 411; If otherwise enter step 412.
Step 411 determines with the target MAC (Media Access Control) address to be broadcast address, sends message to two rings in the mode of flooding, and enters step 405.
Step 412 determines with the target MAC (Media Access Control) address to be broadcast address, sends message on selected ring, and enters step 405.
Present embodiment encircles when transmitting on high-speed data equally, can finish topology more fast and upgrade when not influencing forwarding rate, guarantees to utilize new topological state to transmit processing as early as possible.
In addition, present embodiment can also make node device can make full use of bandwidth resources on the ring more.Avoid in the scheme one using when flooding waste to bandwidth resources.Getting of this benefit mainly is because the change type of topology is distinguished.The benefit of these two values of MAX_HOPS mainly is when change in topology, the topological list item that can not need to revise all variations, only need to revise two maximum hop count variate-values and get final product, make topology upgrade operation indirectly and accelerate, thereby guarantee to utilize new topological state to transmit processing as early as possible.The variation of topology can be divided into two types, the first kind: there is increase and decrease in node on the ring, second class: just encircle the accessibility that goes up node and change.In embodiment 1, no matter the variation of which kind of type has taken place topology, all adopt the mode that floods to send subsequent packet, if ring is gone up node and all had message will go up environment-development this moment to send like this, will make bandwidth on the ring may face the problem of deficiency because of the transmission that floods.And among the embodiment 2; transmission only just floods during node generation increase and decrease on ring; if and just variation has taken place in node accessibility; to send message according to the protected mode of ring so; under the loopback protected mode; only needing that message is sent to any one ring upward gets final product; even because cannot directly arrive between source node and the purpose ground connection on certain ring; message also can be through edge the time; the node that edge taken place by around (wrap) thus mode is looped back to message on another ring and can arrives destination node; if and the protected mode of ring is when switching protected mode; if source node and destination node are unreachable at some rings, message directly can be sent from another environment-development and can guarantee that message arrives destination node.The jumping figure of the destination node farthest that source node can reach on certain ring can calculate and be recorded among the MAX_HOPS by the TP frame.
In the present embodiment, adopting the value of the several token variables of modification and the value of MAX_HOPS to finish topological indirect renewal, can not lock, is because the read-write of these variablees can be finished in a read-write operation instruction.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method can instruct relevant hardware to finish by program, this program can be stored in the computer read/write memory medium, such as ROM/RAM, magnetic disc, CD etc.
Embodiment 3
Present embodiment provides a kind of RPR node device, and as shown in figure 11, this equipment comprises: Control Engine 510 and data engine 520;
Described Control Engine is used to be provided with the protected mode sign, and according to the topological state of described Resilient Packet Ring the forward mode sign is set, and when the topological state of Resilient Packet Ring was the state that changes, described forward mode sign was indicated the forward mode that floods;
Described data engine is used to discern described forward mode sign and protected mode sign; when the topological state of Resilient Packet Ring is the state that changes; adopt the forward mode ring on two enterprising line data of ring that floods to transmit switching under the protected mode, adopting the forward mode ring on an enterprising line data of ring that floods to transmit under the loopback protected mode.
In actual applications, when the topological state of described Resilient Packet Ring was stable state, the topology table forward mode was looked in the indication of described forward mode sign;
When described data engine is stable state at the topological state of Resilient Packet Ring, carries out the ring of going up of data by tabling look-up and transmit.
The RPR node device of present embodiment can be realized the method among the embodiment 1.In the concrete application of the present invention, described node device for example can be switch or router.
Present embodiment also provides a kind of RPR node device, and as shown in figure 12, this equipment comprises:
Described sign is provided with the unit and is used to be provided with the protected mode sign, and the forward mode sign is set according to the topological state of described Resilient Packet Ring, when the topological state of described Resilient Packet Ring changes owing to the increase of node or minimizing, the described forward mode sign indication forward mode that floods;
Described data engine is discerned described forward mode sign and protected mode sign, when the topological state of described Resilient Packet Ring changes owing to the increase of node or minimizing, adopt the forward mode ring on two enterprising line data of ring that floods to transmit under the protected mode switching; Adopting the forward mode ring forwarding on an enterprising line data of ring that floods under the loopback protected mode.
In concrete application of the present invention, described Control Engine can comprise that also variable is provided with the unit, and this variable is provided with the unit and is used to be provided with two maximum hop count variablees, represents the jumping figure of the node farthest that data that source node sends can arrive on two rings respectively;
Be stable state or the increase of not having node or only reduce that at the topological state of described Resilient Packet Ring described forward mode sign is indicated the forward mode of tabling look-up because node accessibility changes when changing;
Described data engine is stable state or the increase of not having node or only reduces because node accessibility variation when changing at the topological state of Resilient Packet Ring, the choosing of tabling look-up encircles and obtains the jumping figure information of destination node on the selected ring, carries out the upward ring forwarding of data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select.For example:
Described data engine is at the jumping figure of the described destination node maximum hop count variable greater than described selected ring correspondence; and protected mode is designated as when switching protected mode; data are switched on another ring, carry out the ring of going up of data by the MAC Address of destination node in the topology table and transmit.
The RPR node device of present embodiment can be realized the method among the embodiment 2.In the concrete application of the present invention, described node device for example can be switch or router.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the data upper ring forwarding method based on Resilient Packet Ring is characterized in that, comprising:
Control Engine is provided with the protected mode sign, and according to the topological state of described Resilient Packet Ring the forward mode sign is set, and when the topological state of Resilient Packet Ring changed, described forward mode sign was indicated the forward mode that floods;
Data engine is according to described forward mode sign identification forward mode, according to protected mode sign identification protecting pattern, forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
2. method according to claim 1 is characterized in that:
When the topological state of described Resilient Packet Ring was stable state, the topology table forward mode was looked in the indication of described forward mode sign;
Described data engine, carries out the ring of going up of data and transmits when looking into the topology table forward mode at forward mode by tabling look-up.
3. the data upper ring forwarding method based on Resilient Packet Ring is characterized in that, comprising:
Control Engine is provided with protected mode sign, two maximum hop count variablees and according to the topological state of described Resilient Packet Ring the forward mode sign is set, wherein said two maximum hop count variablees are represented the jumping figure of the node farthest that the data of source node transmission can arrive respectively on two rings, at the topological state of described Resilient Packet Ring is that website does not have increase and decrease only because node accessibility changes when changing on stable state or the ring, and described forward mode sign is indicated the forward mode of tabling look-up;
Data engine is according to described forward mode sign identification forward mode; according to protected mode sign identification protecting pattern; at described forward mode when tabling look-up forward mode; the choosing of tabling look-up encircles and obtains the jumping figure information that arrives destination node on the selected ring, carries out the upward ring of data according to the relation of the jumping figure information that arrives this destination node maximum hop count variable corresponding with being somebody's turn to do selected ring and transmits.
4. method according to claim 3 is characterized in that, the ring forwarding of going up of carrying out data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select comprises:
At the jumping figure of the described destination node maximum hop count variable greater than described selected ring correspondence, and protected mode is switched to data on another ring when switching protected mode, carries out the ring of going up of data by the MAC Address of destination node in the topology table and transmits.
5. method according to claim 3 is characterized in that, the ring forwarding of going up of carrying out data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select comprises:
When the jumping figure of described destination node is less than or equal to the maximum hop count variable of described selected ring correspondence, transmit by MAC Address ring on the selected enterprising line data of ring of destination node in the topology table.
6. method according to claim 3 is characterized in that, also comprises:
When the topological state of described Resilient Packet Ring changes owing to the increase of node or minimizing, the described forward mode sign indication forward mode that floods;
Described data engine forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
7. an elastic packet link point equipment is characterized in that, comprising: Control Engine and data engine;
Described Control Engine is used to be provided with the protected mode sign, and according to the topological state of described Resilient Packet Ring the forward mode sign is set, and when the topological state of Resilient Packet Ring changed, described forward mode sign was indicated the forward mode that floods;
Described data engine is used for according to described forward mode sign identification forward mode, according to protected mode sign identification protecting pattern, forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
8. node device according to claim 7 is characterized in that:
When the topological state of described Resilient Packet Ring was stable state, the topology table forward mode was looked in the indication of described forward mode sign;
Described data engine also is used at forward mode when looking into the topology table forward mode, carries out the ring of going up of data by tabling look-up and transmits.
9. an elastic packet link point equipment is characterized in that, comprising: Control Engine and data engine; Described Control Engine comprises that sign is provided with the unit;
Described sign is provided with the unit and is used to be provided with protected mode sign, two maximum hop count variablees and according to the topological state of described Resilient Packet Ring the forward mode sign is set, wherein said two maximum hop count variablees are represented the jumping figure of the node farthest that the data of source node transmission can arrive respectively on two rings, at the topological state of described Resilient Packet Ring is that website does not have increase and decrease only because node accessibility changes when changing on stable state or the ring, and described forward mode sign is indicated the forward mode of tabling look-up;
Described data engine is used for according to described forward mode sign identification forward mode; according to protected mode sign identification protecting pattern; at described forward mode when tabling look-up forward mode; the choosing of tabling look-up encircles and obtains the jumping figure information of destination node on the selected ring, carries out the upward ring forwarding of data according to the relation of the jumping figure information of this destination node maximum hop count variable corresponding with the ring that should select.
10. node device according to claim 9 is characterized in that:
When the topological state of described Resilient Packet Ring changes owing to the increase of node or minimizing, the described forward mode sign indication forward mode that floods;
Described data engine also be used for forward mode for the forward mode that floods, protected mode when switching protected mode, adopt the forward mode ring on two enterprising line data of ring that floods to transmit; Forward mode be flood forward mode, adopt the forward mode ring on an enterprising line data of ring that floods to transmit when protected mode is the loopback protected mode.
11. node device according to claim 9 is characterized in that:
Described data engine also is used at the jumping figure of the described destination node maximum hop count variable greater than described selected ring correspondence, and protected mode is designated as when switching protected mode, data are switched on another ring, carry out the ring of going up of data by the MAC Address of destination node in the topology table and transmit;
When described data engine also is used for jumping figure in described destination node and is less than or equal to the maximum hop count variable of described selected ring correspondence, transmit by MAC Address ring on the selected enterprising line data of ring of destination node in the topology table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101500687A CN101582857B (en) | 2009-06-30 | 2009-06-30 | Data upper ring forwarding method based on elastic grouping ring and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101500687A CN101582857B (en) | 2009-06-30 | 2009-06-30 | Data upper ring forwarding method based on elastic grouping ring and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101582857A CN101582857A (en) | 2009-11-18 |
| CN101582857B true CN101582857B (en) | 2011-06-22 |
Family
ID=41364823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101500687A Active CN101582857B (en) | 2009-06-30 | 2009-06-30 | Data upper ring forwarding method based on elastic grouping ring and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101582857B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098342B (en) * | 2011-01-31 | 2013-08-28 | 华为技术有限公司 | Transaction level-based data synchronizing method, device thereof and system thereof |
| CN105471727B (en) * | 2014-08-20 | 2018-11-09 | 新华三技术有限公司 | Message forwarding method in RPR networks and device |
| CN106302067A (en) * | 2015-05-15 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of message processing method and device |
| CN105763409B (en) * | 2016-01-29 | 2019-04-09 | 新华三技术有限公司 | A kind of flow forwarding method and device |
| CN109257263B (en) * | 2018-10-15 | 2021-01-29 | 积成电子股份有限公司 | Data transmission method of on-site protection device based on double-loop network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1642128A (en) * | 2004-01-17 | 2005-07-20 | 华为技术有限公司 | Method for automatic adjusting business path for flexible packet ring network |
| CN1753386A (en) * | 2004-09-22 | 2006-03-29 | 中兴通讯股份有限公司 | Method of elastic packet ring protection mode switching |
| CN1859290A (en) * | 2005-10-28 | 2006-11-08 | 华为技术有限公司 | Processing method for network node configuration information when network topology changing |
| CN101183982A (en) * | 2007-11-21 | 2008-05-21 | 烽火通信科技股份有限公司 | Automatic discovery method based on topological structure of multi-service transmission looped network |
-
2009
- 2009-06-30 CN CN2009101500687A patent/CN101582857B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1642128A (en) * | 2004-01-17 | 2005-07-20 | 华为技术有限公司 | Method for automatic adjusting business path for flexible packet ring network |
| CN1753386A (en) * | 2004-09-22 | 2006-03-29 | 中兴通讯股份有限公司 | Method of elastic packet ring protection mode switching |
| CN1859290A (en) * | 2005-10-28 | 2006-11-08 | 华为技术有限公司 | Processing method for network node configuration information when network topology changing |
| CN101183982A (en) * | 2007-11-21 | 2008-05-21 | 烽火通信科技股份有限公司 | Automatic discovery method based on topological structure of multi-service transmission looped network |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-167008A 2008.07.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101582857A (en) | 2009-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1761219B (en) | Method for implementing automatic discovery of topological structure in MPLS ring net | |
| US7983190B2 (en) | Network system, layer 3 communication device, layer 2 communication device, and route selection method | |
| CN101582834B (en) | Updating method and system of forwarding table during service transmission of Ethernet | |
| CN101843045B (en) | Pinning and protection on link aggregation groups | |
| CN100444574C (en) | Multicast optimization in a VLAN tagged network | |
| CN100459569C (en) | Quick route switching method and apparatus for network node devices | |
| CN102006184B (en) | Management method, device and network device of stack link | |
| US7869439B1 (en) | Varying packet switch behavior based on a quantity of virtual interfaces associated with a virtual switch | |
| US20040160904A1 (en) | Network system, spanning tree configuration method and configuration program, and spanning tree configuration node | |
| CN101582857B (en) | Data upper ring forwarding method based on elastic grouping ring and device | |
| CN104980349A (en) | Relay System and Switching Device | |
| CN100518142C (en) | Method for preventing network interruption caused by address aging and time inconformity | |
| KR20080089285A (en) | Method for protection switching in ethernet ring network | |
| CN102045229A (en) | Topology management method and system of Ethernet multi-loop network | |
| CN103329469A (en) | Method of shrinking a data loss window in a packet network device | |
| CN105978741A (en) | Network fault handling method and system | |
| US20140301403A1 (en) | Node device and method for path switching control in a ring network | |
| CN102035676A (en) | ARP (Address Resolution Protocol) interaction based method and equipment for detecting and recovering link fault | |
| CN100568822C (en) | A kind of graphical display method for service topology based on Resilient Packet Ring | |
| US8948178B2 (en) | Network clustering | |
| US20110299551A1 (en) | Method and Apparatus for Transferring Data Packets Between a First Network and a Second Network | |
| CN100563145C (en) | Bundle interface among the RPR and its implementation and device | |
| CN103516612A (en) | Method for generating routing table items in a distributed router, and distributed router | |
| CN101252503A (en) | Method and apparatus for switching traffic of looped network | |
| JP5387349B2 (en) | Relay device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING Z-GOOD TECHNOLOGY SERVICE CO., LTD. Free format text: FORMER OWNER: FUJIAN XINGWANGRUIJIE NETWORK CO., LTD. Effective date: 20141008 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 350015 FUZHOU, FUJIAN PROVINCE TO: 100085 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141008 Address after: 100085 Beijing city Haidian District No. 33 Xiaoying Road 1 1F06 room Patentee after: BEIJING ZHIGU TECHNOLOGY SERVICES CO., LTD. Address before: 350015 M9511 Industrial Park, fast road, Mawei District, Fujian, Fuzhou Patentee before: Fujian Xingwangruijie Network Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091118 Assignee: Fujian Xingwangruijie Network Co., Ltd. Assignor: BEIJING ZHIGU TECHNOLOGY SERVICES CO., LTD. Contract record no.: 2014990000855 Denomination of invention: Data upper ring forwarding method based on elastic grouping ring and device Granted publication date: 20110622 License type: Common License Record date: 20141105 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |