CN102546343B - Protection switching method and device for intersected rings - Google Patents
Protection switching method and device for intersected rings Download PDFInfo
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- CN102546343B CN102546343B CN201010598430.XA CN201010598430A CN102546343B CN 102546343 B CN102546343 B CN 102546343B CN 201010598430 A CN201010598430 A CN 201010598430A CN 102546343 B CN102546343 B CN 102546343B
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Abstract
The invention provides a protection switching method and a protection switching device for intersected rings. The method comprises the following steps of: if two ring intersection points of a first ring and a second ring which are intersected are detected to be unreachable, and are an active ring passing point and a standby ring passing point of a working label switched path (LSP) respectively, judging whether the ring passing connection of the LSP between the first and second rings is required to be activated or not according to a preset condition; if the ring passing connection of the LSP between the first and second rings is required to be activated, activating the ring passing connection of the LSP between the first and second rings; and switching the active and standby ring passing points to a non-failure direction, and switching other nodes on the first and second rings according to the switching rules of single-ring protection. The ring passing connection between the intersected rings is activated, so that the LSP cannot be interrupted as long as a path is reachable. Therefore, the failure protection of the ring intersection points can be realized, and the condition of more than one failure on the intersected rings is supported.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of protection reverse method and device of intersecting ring.
Background technology
Existing LSP (Label Switched Path, label switched path) protection mechanism, is mainly divided into two kinds: wrapping protection and steering protection.
The situation that wrapping (loopback) protects as shown in Figure 1.Between certain two network element on ring across section, fault detected time, these two network elements trigger looped network protections, and working LSP is switched to ring protection LSP.
The situation that steering (source routing) protects as shown in Figure 2.When ring on certain two network element between across section, fault detected time, it is unreachable that the circling point up and down of LSP judges configuration effort LSP path, is just switched to ring protection LSP.
The ring protection mechanism of existing LSP, has the following disadvantages: (1) does not possess the ability of guard ring crossed node fault; (2) for a ring in intersecting ring, there is the protection of situation of 2 or above fault also incomplete.
Summary of the invention
Main purpose of the present invention is to provide a kind of protection reverse method and device of intersecting ring, does not possess the capability problems of guard ring crossed node fault at least to solve the ring protection mechanism of above-mentioned existing LSP.
According to an aspect of the present invention, a kind of protection reverse method of intersecting ring is provided, comprise: detect between two crossing ring joinings of first ring and the second ring unreachable, and two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP, according to predetermined condition, judge whether to activate this LSP and are connected with the ring of crossing between the second ring at first ring; If so, activating LSP is connected with the ring of crossing between the second ring at first ring; Mainly cross circling point and the standby circling point of crossing is switched to non-fault direction direction, first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection; Wherein predetermined condition is: when the up and down circling point of LSP on first ring or the second ring with main cross between circling point unreachable, need to activate this LSP between first ring and the second ring encircle and be connected.
Further, detect between two crossing ring joinings of first ring and the second ring unreachable, and two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP, according to predetermined condition, judging whether to activate this LSP is connected with the ring of crossing between the second ring at first ring, comprise: whether unreachablely on first ring and the second ring, detect respectively between two ring joinings, for inaccessible ring between two ring joinings, and two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP, and main circling point excessively and this LSP of LSP are unreachable between another upper and lower circling point of ring, activating the cross ring of LSP on this ring connects.
Further; at first ring and the second ring, all activated ring be connected in the situation that; main circling point excessively and the standby circling point of crossing are switched to non-fault direction; first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection; comprise: on first ring, judge that whether LSP is through the standby circling point of crossing; if so, cross ring and be connected to the standby crossing direction of acyclic that circling point is connected to this LSP of crossing.Otherwise, to cross ring and be connected to the standby crossing direction of acyclic that circling point is connected to ring protection LSP of crossing, first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection.
Further; at first ring, activating ring connects; the second ring un-activation is crossed in the situation of ring connection; main circling point excessively and the standby circling point of crossing are switched to non-fault direction; first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection; comprise: on the second ring, judge that LSP is whether through the standby circling point of crossing, if so, cross ring and be connected to and standbyly cross the acyclic that circling point is connected to this LSP and intersect direction.Otherwise, on the second ring judgement standby cross circling point through the main circling point of crossing to the monocycle switching request that whether has this ring coming into force between main second another upper and lower circling point encircling of crossing circling point, if so, cross ring and be connected to the standby crossing direction of acyclic that circling point is connected to ring protection LSP of crossing; Otherwise the ring that is connected to ring protection LSP intersects direction; On the second ring, judge whether the main circling point of crossing has with the standby ring intersection of crossing between circling point the ring switching request coming into force, if so, mainly cross the crossing direction of acyclic that circling point is switched to ring protection LSP; Otherwise the ring that is switched to ring protection LSP intersects direction; First ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection.
Further, the rule of switching of switching the regular wrapping of being protection of monocycle protection.
Further, activate LSP crossing after ring is connected between first ring and the second ring, comprising: the ring of crossing between first ring and the second ring is connected to the message informing second having activated and encircles above another the upper and lower circling point except main circling point; If the operating path of LSP to be through the standby circling point of crossing, and this upper and lower circling point is along LSP operating path to the standby monocycle switching request excessively coming into force without this ring between circling point of LSP, and this upper and lower circling point is from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service; First ring and upper all the other nodes of the second ring are switched by the rule of switching of steering protection.
Further, the monocycle switching request coming into force comprises fault or outside switches the ring switching request that order causes.
Further, activate LSP crossing after ring is connected between first ring and the second ring, comprising: the ring of crossing between first ring and the second ring is connected to the message informing second having activated and encircles above another the upper and lower circling point except main circling point; If the operating path of LSP to be without the standby circling point of crossing of LSP, and upper and lower circling point is along LSP operating path to the primary circling point of crossing, then along ring, intersects direction and cross between circling point without this ring monocycle switching request that coming into force to standby, up and down circling point from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service; First ring and upper all the other nodes of the second ring are switched by the rule of switching of steering protection.
Further, when encircling, the second ring and the 3rd intersects, and LSP is when the second ring enters the 3rd ring, activating LSP crossing after ring is connected between first ring and the second ring, comprising: the ring of crossing between first ring and the second ring is connected to message informing the second ring and the 3rd having activated and encircles crossing two and encircle joinings.
Further, adopt LSP TCM OAM (Tandem Connection Monitoring, Tandem Connection Monitor; Operation, Administration and Maintenance, Operations, Administration and Maintenance) mode is connected the ring of crossing between first ring and the second ring two that message informing the second ring of having activated and the 3rd ring intersect and encircles joinings.
According to a further aspect in the invention, the protection changeover apparatus that a kind of intersecting ring is provided, comprising: whether detection module, encircle between two ring joinings that intersect unreachable for detection of first ring and second, wherein, two are encircled main circling point and the standby circling point of crossing crossed that joining is respectively working LSP; Judge module, judges whether to activate LSP according to predetermined condition and is connected with the ring of crossing between the second ring at first ring; Active module, is connected with the ring of crossing between the second ring at first ring for activating LSP; Switch module, for crossing circling point and be switched to non-fault direction for crossing circling point main, first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection;
Further, this device also comprises: notification module, and for the ring of crossing between first ring and the second ring is connected to upper another the upper and lower circling point except main circling point of message informing the second ring having activated.
Further, notification module is also for intersecting at the second ring and the 3rd ring, and LSP is when the second ring enters the 3rd ring, and the ring of crossing between first ring and the second ring is connected to crossing two of message informing the second ring of having activated and the 3rd ring and encircles joinings.
By the present invention, the ring of crossing that activates as required intersecting ring connects, as long as make LSP have path to reach, just can not interrupt.Thereby realize the protection of guard ring crossed node fault, and support in intersecting ring the situation more than 1 fault.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the wrapping monocycle protection schematic diagram according to correlation technique;
Fig. 2 is the steering monocycle protection schematic diagram according to correlation technique;
Fig. 3 connects situation one schematic diagram according to the ring of crossing of the embodiment of the present invention;
Fig. 4 connects situation two schematic diagrames according to the ring of crossing of the embodiment of the present invention;
Fig. 5 is the protection reverse method flow chart according to the intersecting ring of the embodiment of the present invention;
Fig. 6 is the protection changeover apparatus block diagram according to the embodiment of the present invention;
Fig. 7 switches schematic diagram according to the double-ring intersecting protection of the embodiment of the present invention one;
Fig. 8 switches schematic diagram according to the double-ring intersecting protection of the embodiment of the present invention two;
Fig. 9 intersects protection according to three rings of the embodiment of the present invention three to switch schematic diagram; And
Figure 10 switches handling process schematic diagram according to the protection of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
For the purpose of simplifying the description and give top priority to what is the most important, in following embodiment, switching with monocycle the step that rule is identical all omits.In addition, for convenience, introduce in the following embodiments hereinafter to be referred as:
The upper and lower circling point of LSP: LSP enters/exit the node of a ring.
Ring joining: the intersection point of two intersecting rings.Two rings intersect, and form two ring joinings.
Adjacent ring joining: two rings intersect, in two ring joinings of formation, they are the other side's adjacent ring joining each other.
Ring intersects direction: along two directions of encircling the intersection between joinings.As the direction between the CD in Fig. 3.
The main circling point of crossing of LSP: working LSP enters another ring B by this o'clock from a ring A.The main circling point of crossing of LSP is also the upper and lower circling point of LSP simultaneously.
The standby circling point of crossing of LSP: encircle A and two that encircle B main another ring joinings of crossing circling point of non-LSP of encircling in joinings.
The current circling point of crossing of LSP: current LSP selects which crosses circling point from and crosses ring.If activated, cross ring connection, the current circling point of crossing is the standby circling point of crossing of LSP; Otherwise the current circling point of crossing is the main circling point of crossing of LSP.
The current upper and lower circling point of LSP: for the upper and lower circling point of LSP as ring joining, the current upper and lower circling point of LSP is the current circling point of crossing of LSP; For the upper and lower circling point of the LSP as acyclic joining, the current upper and lower circling point of LSP is the upper and lower circling point of LSP.
The upper and lower circling point of LSP far-end: if LSP is successively through two crossing rings (ring A and ring B), on ring B, the main mistake circling point of the LSP of this LSP between ring A and ring B, another upper and lower circling point, is called this LSP and is encircling the LSP far-end upper and lower circling point of B with respect to ring A.
Encircle between two nodes unreachable: being illustrated in this ring does not above have trouble-free path can reach another node from a node.
Crossing ring connects: when two rings intersect; if the working LSP path of configuration is through a ring joining of intersecting ring; thereby from ring A, enter ring B, the ring that was connected to for this LSP or its ring protection LSP are jumped to ring B from ring A that claims to set up in another ring joining connects.
When two paths that interconnect between contacts of this ring are passed through in configuration effort LSP path on some rings, the ring tie point excessively of this ring is in working LSP; Otherwise the ring tie point excessively of this ring is on ring protection LSP.
There are following two kinds to cross ring connection, as shown in the camber line of Fig. 3 and Fig. 4 band arrow.If cross ring tie point on ring protection LSP, there are two possible directions: ring intersects direction and acyclic intersects direction.When activating ring connection, be specifically connected in which direction step below and determine.Monocycle protected mode in Fig. 3 and Fig. 4 example is wrapping protection, monocycle protected mode be steering protection situation similarly.
The content of the present embodiment relates to steering guard ring or wrapping guard ring, the increased functionality under the situation of dual node interconnection, and each ring can adopt steering protection or wrapping protection independently.Operator precedence listed in the present embodiment is in the action of monocycle steering protection or wrapping protection.
The concrete operation step of the present embodiment is as follows:
(1), for two rings that intersect, be assumed to be ring A and ring B, two ring joinings, carry out following operation:
1. first at ring A and ring B, judge respectively between them whether can reach.
2. if this ring, such as ring A, unreachable,, in two of B ring joinings of ring A and ring, proceed as follows respectively: if this joining is standby circling point or the main circling point of crossing crossed of certain LSP, then at ring A, judges whether to activate the ring of crossing that this LSP is corresponding and connect.If need to activating the ring of crossing that this LSP is corresponding, ring A connects:
(1) at the standby circling point of crossing, activate the ring of crossing that this LSP is corresponding and connect.In addition, if ring B intersects with ring C again, and this LSP enters ring C through ring B, at the standby circling point of crossing, to ring B, sends notice with the ring joining of the homonymy with it of ring C, notifies this LSP to activate ring and connects.When standby cross circling point reactivation do not crossed ring and connected after, send notice, notify this LSP un-activation to cross ring and connect.The mode that sends notice can adopt the mode of LSP TCM OAM or other any mode.
(2) at the primary circling point of crossing, if primary, cross circling point and the standby switching request just not coming into force between circling point of crossing on ring B, the ring that is switched to ring protection LSP from operating path at ring B intersects direction (because there is link separately between two ring joinings ring A and ring B, when the link between two ring joinings on ring B can reach, while switching on B ring, the preferential ring of selecting intersects direction); Otherwise on ring B, from operating path, be switched to the crossing direction of acyclic of ring protection LSP.In addition, if ring B intersects with ring C again, and this LSP enters ring C through ring B, at the main circling point of crossing, to ring B, sends notice with the ring joining of the homonymy with it of ring C, notifies this LSP to activate ring and connects; Otherwise, if this LSP through after ring A, ring B, no longer enters another and the crossing ring of ring B, at the main circling point of crossing, on ring B, to the circling point up and down of another ring B, send notice, notify this to put this LSP and activated ring and connect.When primary, cross after circling point judgement do not need to activate ring and connect, send notice, notify this LSP un-activation to cross and encircle connection.The mode that sends notice can adopt the mode of LSP TCM OAM or other any mode.If LSP intersects with ring B at ring A, the standby circling point of crossing had activated and crosses ring and is connected, and this LSP crosses the operator precedence of circling point in this step in monocycle switching action at these two, these two circling point no longer fill order's ring switching move.
In above-mentioned steps, at certain ring, judge whether to need to activate that to encircle the rule of connection as follows: if on this ring, the position of two current upper and lower circling points by this LSP in ring, judge this LSP and can not cross ring by the main circling point of crossing, this LSP main cross circling point with this LSP's and in same ring, do not intersect across the LSP in section current upper and lower circling point or currently cross between circling point be unreachable, activated and encircle connection; Otherwise not activating ring connects.
In above-mentioned steps, activating after ring connection for crossing circling point of LSP, if encircle ring connection at certain, entered working LSP, preferably acyclic intersects direction.If encircle to encircle to connect at certain, entered ring protection LSP, selecting sequence is as follows: if this ring requirement activates, encircle connection, cross ring and be connected to the crossing direction of this ring selection acyclic; Otherwise, if at this ring, such as ring B, standby cross circling point and ring B another not in same ring intersect across the LSP in section between current upper and lower circling point along ring, intersect direction there is no this ring monocycle switching request that coming into force, select to encircle crossing direction; Otherwise select acyclic to intersect direction.The monocycle switching request wherein coming into force comprises fault, or the ring switching request that order causes is switched in outside.
(2), at each node of intersecting ring, such as each node of ring B, for certain LSP, if it is another ring relatively, encircle the upper and lower circling point of LSP far-end of A, and ring B adopts is Steering protection, be handled as follows:
If 1 crosses link point or standbyly crosses message that link point sends and determine that ring A had activated and cross ring and connect by the LSP that receives is main, LSP two ring joinings that this node is selected to intersect from ring A and ring B standby circling point receive/send out the packet of this LSP.Be divided into again several situations:
(1) if the operating path of this LSP through the standby circling point of crossing of LSP, and this upper and lower circling point along LSP operating path to the standby monocycle switching request excessively coming into force without this ring between circling point of LSP, from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service.The monocycle switching request wherein coming into force comprises fault, or the ring switching request that order causes is switched in outside.
(2) if the operating path of this LSP without the standby circling point of crossing of LSP, and this upper and lower circling point is along LSP operating path to the primary circling point of crossing, again along ring intersect direction between standby mistake circling point without this ring monocycle switching request that coming into force, from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service.This operator precedence is in monocycle switching action, if this operation is carried out, and no longer fill order's ring switching action.
2. if this LSP far-end is crossed circling point and be can not receive that LSP is main crosses the message that ring connects that whether activated that circling point sends, or receive that LSP is main and cross message that circling point sends and show not activate ring and connect, at this node, this LSP press to the processing of monocycle switch status.
(3) except in abovementioned steps () 2: activated at the standby circling point of crossing of LSP the situation of crossing ring connection; and in step (two) 1 (2): cross outside the situation that circling point is switched to ring protection LSP at LSP far-end, it is identical that the processing of node and monocycle are switched rule.Because LSP is primary, crossing circling point may be also that LSP far-end is crossed circling point, if this point has activated and crossed ring connection in step (), the operator precedence of step () is in step (twos') operation; And if ring connection is crossed in un-activation in step (), by the operation of step (two).
In above-mentioned steps; if LSP is only through two intersecting ring A and B, i.e. LSP the 3rd ring through intersecting with A or B no longer, and ring A and B all adopt wrapping protection; the main circling point of crossing does not need transmission to activate the notice that ring is connected with the standby circling point of crossing, and scheme is simplified.
Fig. 5 is the protection reverse method flow chart according to the intersecting ring of the embodiment of the present invention, as shown in Figure 5, comprises the following steps:
Step S502, detect between two crossing ring joinings of first ring and the second ring unreachable, and two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP, according to predetermined condition, judge whether to activate this LSP and are connected with the ring of crossing between the second ring at first ring.
Step S504, if so, activates LSP and is connected with the ring of crossing between the second ring at first ring.
Step S506, mainly crosses circling point and the standby circling point of crossing is switched to non-fault direction, and first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection.
In the present embodiment, by activating the ring of crossing of intersecting ring, connect, as long as make LSP have path to reach, just can not interrupt.Thereby realize the protection of guard ring crossed node fault.
Wherein, in above-mentioned steps S502, activated the predetermined condition that ring connects and be: when the up and down circling point of LSP on first ring or the second ring with main cross between circling point unreachable, need to activate this LSP between first ring and the second ring encircle and be connected.
Wherein, in above-mentioned steps S502, whether unreachablely on first ring and the second ring, detect respectively between two ring joinings, for inaccessible ring between two ring joinings, and two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP, according to predetermined condition, judge whether to activate the cross ring of LSP on this ring and connect.
Wherein, in above-mentioned steps S506; at first ring and the second ring, all activated ring is connected in the situation that, and mainly crossed circling point and standbyly cross the acyclic that circling point is switched to ring protection LSP and intersect direction, the rule of switching that first ring and upper all the other nodes of the second ring are protected by monocycle is switched.
Wherein, in above-mentioned steps S506, at first ring, activating ring connects, the second ring un-activation is crossed in the situation of ring connection, on the second ring judgement standby cross circling point through the main circling point of crossing to the monocycle switching request that whether has this ring coming into force between main second another upper and lower circling point encircling of crossing circling point, if so, main circling point excessively and the standby circling point of crossing are switched to the crossing direction of acyclic of ring protection LSP from LSP operating path; Otherwise the ring that is switched to ring protection LSP from LSP operating path intersects direction; First ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection.
Wherein, in above-mentioned steps S506, first ring and upper all the other nodes of the second ring can be switched by the rule of switching of wrapping protection.If the rule of switching by steering protection is switched; activating LSP after crossing between first ring and the second ring encircled and be connected; need to be upper except main another upper and lower circling point of crossing circling point by activating message informing the second ring; the mode that sends notice can adopt the mode of LSP TCM OAM or other any mode.
Wherein, in above-mentioned steps, the monocycle switching request coming into force comprises fault or outside switches the ring switching request that order causes.
In above-mentioned method, if the second ring intersects with the 3rd ring again, and this LSP enters the 3rd ring through the second ring, main, cross circling point and to the second ring and the 3rd ring joining that encircle, homonymy with it, send notice respectively for crossing circling point, notify this LSP to activate and encircle to connect.When standby cross circling point reactivation do not crossed ring and connected after, send notice, notify this LSP un-activation to cross ring and connect.Can determine that the second ring and the 3rd encircles the main circling point of crossing that in two ring joinings that intersect, which intersection point is working LSP according to this message, all the other steps are identical with the protection reverse method of intersecting ring in said method.The mode that sends notice can adopt the mode of LSP TCMOAM or other any mode.
Fig. 6 is the protection changeover apparatus block diagram according to the embodiment of the present invention, and as shown in Figure 6, this device comprises: detection module 10, active module 20 and switch module 30.
Detection module 10, whether unreachable between two ring joinings that intersect for detection of first ring and the second ring, wherein, two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP; Judge module 20, judges whether to activate LSP according to predetermined condition and is connected with the ring of crossing between the second ring at first ring; Active module 30, is connected with the ring of crossing between the second ring at first ring for activating LSP; Switch module, for crossing circling point and standbyly cross the acyclic that circling point is switched to ring protection LSP and intersect direction main, first ring and upper all the other nodes of the second ring are switched by the rule of switching of monocycle protection.Wherein, activated the predetermined condition that ring connects and be: when the up and down circling point of LSP on first ring with main cross between circling point unreachable, need to activate this LSP between first ring and the second ring encircle and be connected.
Wherein, this device also comprises: notification module, and for the ring of crossing between first ring and the second ring is connected to upper another the upper and lower circling point except main circling point of message informing the second ring having activated.If the second ring intersects with the 3rd ring again, and this LSP enters the 3rd ring through the second ring, notification module is also for intersecting at the second ring and the 3rd ring, and LSP entered for the 3rd when ring through the second ring, the ring of crossing between first ring and the second ring is connected to crossing two of message informing the second ring of having activated and the 3rd ring and encircles joinings.
Embodiment mono-
The present embodiment is described the handling process that the double-ring intersecting protection under a kind of situation is switched in detail, as shown in Figure 7.Network element A, B, C, D, E, F makeup ring 1, network element E, F, G, H, I, J makeup ring 2.Ring 1 is E and F with the joining of ring 2.Working LSP 1 is passed through A successively, C, E, G, five network elements of I.Two fault points are respectively network element C, the optical fiber between E and network element E, the optical fiber between F.
If ring 1 is wrapping protection with ring 2, processing procedure is as follows:
At ring joining E, F, by analysis, draws between ring 1 node E and F unreachable.Analyze again LSP1, it and main to cross between circling point E be unreachable, need activate to encircle connection.Main being treated to from CE direction of circling point E excessively, be switched to GE direction, and the ring of crossing of notifying I to activate LSP1 connects.Standby, cross being treated to of circling point F and activate the ring of crossing that LSP1 is corresponding and connect, due to also unreachable at ring 2 between EF, so, cross ring and be connected to ring 1 and select DF direction, at ring 2, select HF directions.Business after having switched is as shown in the dotted line of Fig. 7.
If ring 1 is steering protection with ring 2, processing procedure is as follows:
Processing procedure is above identical with above-mentioned wrapping protection, and the step of increase is: LSP1 is I at the upper and lower circling point of far-end of ring 2, at I, checks and accepts after the notice of being ring connection activation, is switched to the ring protection LSP transmitting and receiving service from IJ direction.
Embodiment bis-
The present embodiment is described the handling process that the double-ring intersecting protection under another kind of situation is switched in detail, as shown in Figure 8, and network element A, B, C, D, E, F makeup ring 1, network element E, F, G, H, I, J makeup ring 2.Ring 1 is E and F with the joining of ring 2.Working LSP 1 is passed through A successively, C, E, G, five network elements of I.Fault point divides E network element to lose efficacy.
If ring 1 is wrapping protection with ring 2, processing procedure is as follows:
At ring joining F, by analysis, draw at ring 1 and ring 2 unreachable between node E and F.Analyze LSP1, at ring 1 A point, it is with main to cross between circling point E be unreachable again, needs activate to encircle connection.At ring 2 I point, it is with main to cross between circling point E be also to unreachable, needs activate to encircle connection.Standby, cross being treated to of circling point F and activate the ring of crossing that LSP1 is corresponding and connect, cross ring and be connected to ring 1 and select DF direction, at ring 2, select HF directions.Business after having switched is as shown in the dotted line of Fig. 7.
If ring 1 is steering protection with ring 2, the difference of processing is only embodied in monocycle and switches in regular difference, and other is identical.
Embodiment tri-
The present embodiment is described three rings in detail and is intersected the handling process that protection is switched, as shown in Figure 9.Network element A, B, C, D, E, F makeup ring 1, network element E, F, G, H, I, J makeup ring 2, network element I, J, K, L, M, N makeup ring 3.Ring 1 is E and F with the joining of ring 2, and ring 2 is I with the joining of ring 3, J.Working LSP 1 is passed through A successively, C, E, F, H, J, L, eight network elements of N.Three fault points are respectively optical fiber, the optical fiber between I-J and the optical fiber between D-F between E-F.
If ring 1 is wrapping protection with ring 2 and ring 3, processing procedure is as follows:
At joining E and the F of ring 1 and ring 2, by analysis, draw between ring 1 and ring 2E and F unreachable.Analyze again LSP1, it and main to cross between circling point F be unreachable, need activate to encircle connection.At the main ring protection LSP that switches DF direction at ring 1 that is treated to that crosses circling point F, encircle 2 and be switched to the ring protection LSP of FH direction, and notify J point LSP1 to activate and crossed ring connection at ring 1, notify A point LSP1 to activate and crossed ring connection at ring 2.Standby, cross being treated to of circling point E and activate the ring of crossing that LSP1 is corresponding and connect, cross ring and be connected to ring 1 and select LSP1 at the operating path of CE direction, at ring 2, select the ring protection LSP of EG directions.And E point need to notify I point LSP1 to activate and crossed ring connection at ring 1.
At joining I and the J of ring 2 and ring 3, by analysis, I and J are unreachable at ring 2.Analyze LSP1, I and J point are all notified again, and LSP1 has activated and crossed ring connection at ring 1, so the current circling point of crossing between ring 1 and ring 2 has changed E into by F.Accessibility between I and J point analysis J and E, draws between J and E as unreachable.Thereby between ring 2 and ring 3, activating ring connects.Main, cross being treated at ring 3 of circling point J and be switched to the ring protection LSP of JL direction, and notify N point to activate ring connection at ring 2.Standby, cross the ring of crossing that being treated to of circling point I activate between ring 2 and ring 3 and connect, cross ring and be connected to the ring protection LSP that ring 2 is selected GI directions, at ring 3, select the ring protection LSP of JK directions.Business after having switched is as shown in the dotted line of Fig. 9.
If ring 1 is steering protection with ring 2, processing procedure is as follows:
Processing procedure is above identical with above-mentioned wrapping protection, and the step of increase is: LSP1 is N at the upper and lower circling point of far-end with respect to ring 2 of ring 3, checks and accepts to be to encircle to connect after the notice activating at N, is switched to the ring protection LSP transmitting and receiving service from MN direction.
Figure 10 switches handling process schematic diagram according to the protection of the embodiment of the present invention, and in the present embodiment, working LSP may have many, and the intersecting ring that working LSP is passed through also may have a plurality of, and as shown in figure 10, concrete handling process comprises:
Step S1002, judges whether this node encircles joining.If so, perform step S1004, otherwise, proceed to step S1018.
Step S1004, judges whether another encircles between joining and this point unreachable, if so, performs step S1006, otherwise, proceed to step S1018.
Step S1006, finds out the set of crossing the LSP of ring with this node or adjacent ring joining.
Step S1008, in judgement set, whether all LSP are all processed, if not, perform step S1010, if so, proceed to step S1018.
Step S1010, takes off a LSP.
Step S1012, judges whether that needing to activate ring connects, and if so, performs step S1014; If not, perform step S1016.
Step S1014, activated ring connection for crossing circling point, and sent the message that ring connection has activated; The main circling point of crossing is from ring protection LSP receipts/sending service, and sends and encircle the message that connection has activated; Proceed to step S1008.
Step S1016, sent ring and connected unactivated message; Proceed to step S1008.
Step S1018, finds out and usings this node and as far-end, cross the set of the LSP of circling point.
Step S1020, in judgement set, whether all LSP are all processed, and if so, handling process finishes; If not, perform step S1022.
Step S1022, takes off a LSP.
Step S1024, judges whether this node receives that other ring had activated the message that ring connects, if so, performed step S2026; If not, perform step S2030.
Step S1026, judges that LSP operating path passes through between standby circling point excessively or this node and main mistake circling point whether have the switching request coming into force, and if so, performs step S2030; If not, perform step S2028.
Step S1028, is switched to ring protection LSP; Proceed to step S1020, above-mentioned steps is carried out in circulation.
Step S1030, switches rule process by monocycle; Proceed to step S1020, above-mentioned steps is carried out in circulation.
By the above embodiment of the present invention, the protection of supportive protection ring crossed node fault; Support each ring in intersecting ring to have 0,1, or more than the situation of 1 fault, as long as and have path to reach, LSP just can not interrupt; Intersecting ring, under the situation of many places fault, does not need to introduce and switches lag time, can meet the switching time requirement that is less than 50ms.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (13)
1. a protection reverse method for intersecting ring, is characterized in that, comprising:
Detect between two crossing ring joinings of first ring and the second ring unreachable, and described two ring joinings are respectively main circling point and the standby circling point of crossing crossed of label switching path LSP, according to predetermined condition, judge whether to activate this LSP and are connected with the ring of crossing between described the second ring at described first ring;
If so, activating described LSP is connected with the ring of crossing between described the second ring at described first ring;
Describedly mainly cross circling point and the described standby circling point of crossing is switched to non-fault direction, described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection;
Wherein, described predetermined condition is: when the up and down circling point of described LSP on first ring or the second ring with described main cross between circling point unreachable, need to activate this LSP between described first ring and described the second ring encircle and be connected; The main circling point of crossing of LSP: working LSP enters another ring B by this o'clock from a ring A, the main circling point of crossing of LSP is also the upper and lower circling point of LSP simultaneously; The standby circling point of crossing of LSP: main another ring joining of crossing circling point of non-LSP in two ring joinings of ring A and ring B; Crossing ring connects: when two rings intersect; if the working LSP path of configuration is through a ring joining of intersecting ring; thereby from ring A, enter ring B, the ring that was connected to for this LSP or its ring protection LSP are jumped to ring B from ring A that claims to set up in another ring joining connects.
2. method according to claim 1, it is characterized in that, detect between two crossing ring joinings of first ring and the second ring unreachable, and described two ring joinings are respectively main circling point and the standby circling point of crossing crossed of LSP, according to predetermined condition, judge whether to activate this LSP and be connected with the ring of crossing between described the second ring at described first ring, comprising:
Whether unreachablely on described first ring and described the second ring, detect respectively between two ring joinings, for inaccessible ring between two ring joinings, and described two ring joinings are respectively main circling point and the standby circling point of crossing crossed of LSP, and main circling point excessively and this LSP of described LSP are unreachable between another upper and lower circling point of described ring, activate the cross ring of described LSP on this ring and connect.
3. method according to claim 2; it is characterized in that; at described first ring and described the second ring, all activated ring be connected in the situation that; described main circling point excessively and the described standby circling point of crossing are switched to non-fault direction; described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection, comprising:
On described first ring, judge that described LSP is whether through the described standby circling point of crossing, if so, cross ring and be connected to and describedly standbyly cross the acyclic that circling point is connected to this LSP and intersect direction; Otherwise; cross ring and be connected to the described standby crossing direction of acyclic that circling point is connected to ring protection LSP of crossing; described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection; wherein; cross ring tie point on ring protection LSP, have two possible directions: ring intersects direction and acyclic intersects direction.
4. method according to claim 2; it is characterized in that; at described first ring, activating ring connects; described the second ring un-activation is crossed in the situation of ring connection; described main circling point excessively and the described standby circling point of crossing are switched to non-fault direction; described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection, comprising:
On described the second ring, judge that described LSP is whether through the described standby circling point of crossing, if so, cross ring and be connected to and describedly standbyly cross the acyclic that circling point is connected to this LSP and intersect direction; Otherwise, on described the second ring, judge described standby cross circling point through the described main circling point of crossing to the monocycle switching request that whether has this ring coming into force between main described second another upper and lower circling point encircling of crossing circling point, if so, cross ring and be connected to the described standby crossing direction of acyclic that circling point is connected to ring protection LSP of crossing; Otherwise the ring that is connected to ring protection LSP intersects direction;
On described the second ring, judge whether the described main circling point of crossing has with the described standby ring intersection of crossing between circling point the ring switching request coming into force, if so, the described main crossing direction of acyclic that circling point is switched to ring protection LSP of crossing; Otherwise the ring that is switched to ring protection LSP intersects direction;
Described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection.
5. according to the method described in claim 1 to 4 any one, it is characterized in that the rule of switching of switching the regular wrapping of being protection of described monocycle protection.
6. according to the method described in claim 1 to 4 any one, it is characterized in that, activate described LSP crossing after ring is connected between described first ring and described the second ring, comprising:
The ring of crossing between described first ring and described the second ring is connected to upper another the upper and lower circling point except described main circling point of the second ring described in the message informing having activated;
If the operating path of described LSP standby is crossed circling point through described, and the monocycle switching request that coming into force without this ring between standby circling point along LSP operating path to LSP of described upper and lower circling point, described upper and lower circling point is from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service;
Described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of steering protection.
7. method according to claim 6, is characterized in that, the described monocycle switching request coming into force comprises fault or outside switches the ring switching request that order causes.
8. according to the method described in claim 1 to 4 any one, it is characterized in that, activate described LSP crossing after ring is connected between described first ring and described the second ring, comprising:
The ring of crossing between described first ring and described the second ring is connected to upper another the upper and lower circling point except described main circling point of the second ring described in the message informing having activated;
If the operating path of described LSP is without the standby circling point of crossing of LSP, and described upper and lower circling point is along LSP operating path to the main circling point of crossing, along ring, intersect direction to the standby monocycle switching request coming into force without this ring between circling point of crossing again, described upper and lower circling point is from working LSP transmitting and receiving service; Otherwise from ring protection LSP transmitting and receiving service;
Described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of steering protection;
Wherein, cross ring tie point on ring protection LSP, have two possible directions: ring intersects direction and acyclic intersects direction.
9. according to the method described in claim 1 to 4 any one, it is characterized in that, when described the second ring and the 3rd ring intersect, and described LSP is when described the second ring enters described the 3rd ring, mistake at the described LSP of activation between described first ring and described the second ring comprises after encircling and being connected:
The ring of crossing between described first ring and described the second ring is connected to two that the second ring and described the 3rd ring intersect described in the message informing having activated and encircles joinings.
10. method according to claim 9, it is characterized in that, adopt label switched path Tandem Connection Monitor operate, manage, safeguard that LSP TCM OAM mode is connected the ring of crossing between described first ring and described the second ring second ring and the described the 3rd described in the message informing having activated and encircles crossing two and encircle joinings.
The protection changeover apparatus of 11. 1 kinds of intersecting rings, is characterized in that, comprising:
Detection module, whether unreachable between two ring joinings that intersect for detection of first ring and the second ring, wherein, described two ring joinings are respectively main circling point and the standby circling point of crossing crossed of working LSP;
Judge module, judges whether to activate described LSP according to predetermined condition and is connected with the ring of crossing between described the second ring at described first ring;
Active module, is connected with the ring of crossing between described the second ring at described first ring for activating described LSP;
Switch module, for mainly crossing circling point and the described standby circling point of crossing is switched to non-fault direction by described, described first ring and upper all the other nodes of described the second ring are switched by the rule of switching of monocycle protection;
Wherein, described predetermined condition is: when the up and down circling point of described LSP on first ring or the second ring with described main cross between circling point unreachable, need to activate this LSP between described first ring and described the second ring encircle and be connected; The main circling point of crossing of LSP: working LSP enters another ring B by this o'clock from a ring A, the main circling point of crossing of LSP is also the upper and lower circling point of LSP simultaneously; The standby circling point of crossing of LSP: main another ring joining of crossing circling point of non-LSP in two ring joinings of ring A and ring B; Crossing ring connects: when two rings intersect; if the working LSP path of configuration is through a ring joining of intersecting ring; thereby from ring A, enter ring B, the ring that was connected to for this LSP or its ring protection LSP are jumped to ring B from ring A that claims to set up in another ring joining connects.
12. according to device described in claim 11, it is characterized in that, also comprises:
Notification module, for being connected upper another the upper and lower circling point except described main circling point of the second ring described in the message informing having activated by the ring of crossing between described first ring and described the second ring.
13. according to device described in claim 12, it is characterized in that, described notification module is also for intersecting at described the second ring and the 3rd ring, and described LSP enters described the 3rd when ring through described the second ring, the ring of crossing between described first ring and described the second ring is connected to crossing two of the second ring and described the 3rd ring described in the message informing having activated and encircles joinings.
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| CN105207871B (en) * | 2014-06-25 | 2020-07-31 | 南京中兴软件有限责任公司 | Double-cut ring network protection method and device |
| CN105915371B (en) * | 2016-04-07 | 2019-03-26 | 烽火通信科技股份有限公司 | A kind of bicyclic escape realization method and system of PTN looped network protection |
| CN108270488B (en) * | 2018-01-22 | 2021-03-09 | 北京中研科信息技术有限公司 | Non-master-slave virtual full duplex network |
| CN111726287B (en) * | 2020-07-13 | 2022-01-25 | 中国联合网络通信集团有限公司 | Ring network protection method and device |
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| CN101013992A (en) * | 2007-02-14 | 2007-08-08 | 中兴通讯股份有限公司 | Automatic protection method of Ethernet |
| CN101594191A (en) * | 2008-05-27 | 2009-12-02 | 华为技术有限公司 | The guard method of shared link interlinking ring network, system and interlink node |
| CN101645812A (en) * | 2009-08-31 | 2010-02-10 | 武汉烽火网络有限责任公司 | Protection switching method of Ethernet intersecting ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040179471A1 (en) * | 2001-03-07 | 2004-09-16 | Adisak Mekkittikul | Bi-directional flow-switched ring |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013992A (en) * | 2007-02-14 | 2007-08-08 | 中兴通讯股份有限公司 | Automatic protection method of Ethernet |
| CN101594191A (en) * | 2008-05-27 | 2009-12-02 | 华为技术有限公司 | The guard method of shared link interlinking ring network, system and interlink node |
| CN101645812A (en) * | 2009-08-31 | 2010-02-10 | 武汉烽火网络有限责任公司 | Protection switching method of Ethernet intersecting ring |
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