CN101227370B - Method for processing fault of transferring multi-protocol label switch sharing protection ring - Google Patents
Method for processing fault of transferring multi-protocol label switch sharing protection ring Download PDFInfo
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- CN101227370B CN101227370B CN2008100081376A CN200810008137A CN101227370B CN 101227370 B CN101227370 B CN 101227370B CN 2008100081376 A CN2008100081376 A CN 2008100081376A CN 200810008137 A CN200810008137 A CN 200810008137A CN 101227370 B CN101227370 B CN 101227370B
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Abstract
The invention provides a processing method of transmission multi-protocol label exchange sharing protection ring faults, when topological structure of the transmission multi-protocol label exchange sharing protection ring is changed, a switching node judges the reachable status of an inlet node and an outlet node of a work label exchange path, when the inlet node or/and the outlet node can not reach, a pressing operation is carried on. The method of the invention judges reachable status for an inlet node and an outlet node of work LSP through a node which is bridging or switching action, when the inlet node or the output node can not reach, bridge joint and switching operation is withdrawn, and when the inlet node can not reach, but the outlet node can reach, alarming information is sent to the outlet node, thereby avoiding unnecessary waste of network bandwidth, and achieving of rapidly noticing that the outlet node service can not reach.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of transmission multiprotocol label switching (Transport Multi Protocol Label Switching, the TMPLS) processing method of protection rings fault.
Background technology
Along with being the fast development of the telecommunication service of core with the data service, the business that turns to feature with grouping has become communication network loaded service main body, has taken and consumed a large amount of transmission Internet resources of operator.Be carrier time division multiplexing (Time Division Multiplex, TDM) the professional and conventional telecommunications transmission network optimized, can't satisfy the requirement of the Packet Service of a new generation fully, therefore, the Packet Transport Network technology has developed by leaps and bounds, the Packet Transport Network technology can satisfy the characteristics of Packet Service, can carry Packet Service more efficiently, also follow simultaneously to have and transmit net based on circuit, as, can expand, can manage and advantages such as high survivability.
TMPLS is a kind of Packet Transport Network technology of being formulated by International Telecommunications Union's telecommunication standards group (ITU-T), TMPLS can regard multiprotocol label switching (Multi Protocol LabelSwitching as, MPLS) an expansion subclass, data are based on that the MPLS label transmits, be connection-oriented MPLS, and some sophisticated functions of MPLS simplified, having removed forwarding unnecessary in the data surface handles, such as: (Penultmate Hop Pop is ejected in the last two jump, PHP), this valency multipath (equal-cost multipath, ECMP), processing such as label merging and meticulous bag abandon.
The TMPLS technology is utilized the pseudo-line technology (Pseudowire of MPLS/; PW); can realize that any business transmits by MPLS/PW; can satisfy the requirement that multi-service transmits,, absorb multiple service supporting simultaneously with respect to pseudo-line technology (PW); technology such as TDM business simulating; and increased the connection-oriented Operations, Administration and Maintenance of ITU-T (Operation, Administration andMaintenance, OAM) function and the protection restore funcitons.Defined the linear protection and the looped network protection mechanism that meet transmission net characteristics among the TMPLS, can realize that the protection of 50ms is switched.
G.8132 be the standard of the shared ring protection of TMPLS of ITU-T formulation; the TMPLS protection rings is similar to SDH (Synchronous Digital Hierarchy) (Synchronous Digital Hierarchy; SDH) protection rings; on protection rings, establish protection path and operating path simultaneously; the TMPLS protection rings is divided into loopback (Wrapping) and turns to (Steering), is similar to turning to of describing in G.8417.2 middle loopback of describing of SDH protection rings standard and the appendix A respectively.
The Steering mode is meant near the Node Diagnostics the fault after fault, fault message is notified to ring goes up all nodes, and the source node that sends data forwards data on the protection path to according to the fault message that receives and sends, thereby walks around malfunctioning node; The protection path of Steering mode is the paths relative with operating path between the source node of the transmission data on the protection rings and destination node.
As shown in Figure 1, under the Wrapping mode, at first to be each bar work tap switching path (the Label Switched Path on the TMPLS protection rings, LSP) set up a protection LSP, LSP is opposite with the working LSP direction in this protection, and through closed loop of all nodes formation on the TMPLS protection rings, in Fig. 1, heavy line is a working LSP, and dotted line is protection LSP, and fine line is a TMPLS protection rings topology line, A-F is the node on the topology, node A is the ingress of working LSP, that is, and and the source node of the data that working LSP sends; Node D is the egress of working LSP, that is, and and the destination node of the business that working LSP sends.
As shown in Figure 2; when certain section of striding on the working LSP breaks down; as; be to break down between Node B and the joint C in Fig. 2; at this moment, Node B is forwarded to business on the protection LSP, promptly from working LSP; Node B is carried out the bridge joint action; from arriving node C in the other direction, node C is forwarded to business on the working LSP, promptly from protection LSP this business again along protection LSP; node C carries out switching action; this business arrives node D through working LSP again, and through above operation, the business that is transmitted has just been walked around the fault section of striding and arrived egress; that is node D.Bridge operation and switching operation are referred to as switch status.
Yet; when working LSP and protection on the LSP with the relative section of striding of working LSP on when barrier taking place simultaneously or node failure being arranged; even by adopting protection LSP; the ingress of working LSP and egress also can't be interconnected; at this moment, which kind of operation all can not be sent to egress to business from ingress by.In this case, will be in the prior art through the long stand-by period, the egress of working LSP can know that just business can't arrive, this will cause the delay of subsequent treatment, and, in this case, if still carry out normal bridge joint, switching operation, only can cause waste to the network bandwidth.
Summary of the invention
The technical problem to be solved in the present invention provides on a kind of TMPLS protection rings and the many places fault to take place makes under the protection of protection LSP; when the ingress of working LSP and egress also can't be communicated with, avoid processing method to the wasting TMPLS protection rings of network bandwidth fault.
For solving the problems of the technologies described above; a kind of processing method that transmits the multi-protocol label switch sharing protection ring fault of the present invention; when the topological structure that transmits multi-protocol label switch sharing protection ring changes; switching node is to the ingress of work tap switching path and can judging by the arrival state of egress; when ingress or/and egress can not arrive the time, carries out pressing operation.
Further, switching node maybe has been in the node of switch status when the topological structure that transmits multi-protocol label switch sharing protection ring changes for the node that enters switch status when the topological structure that transmits multi-protocol label switch sharing protection ring changes.
Further, when ingress can not arrive, when egress can arrive, this node that is in switch status also sent warning message to egress, notifies its business to arrive.
Further, pressing operation is meant: make node not carry out bridge joint and switching action, if node is carrying out bridge joint or switching operation, then when node carries out bridge operation, cancel this bridge joint action; When node carries out switching operation, cancel this switching operation.
Further, warning message is the node that is in switch status, on the work tap switching path, to the forward faults index signal of egress direction insertion.
Further, the process of can the arrival state judging to the ingress of work tap switching path and egress is:
Step a: when transmitting multi-protocol label switch sharing protection ring and break down, with the contiguous node of fault nidus after detecting fault, fault message is notified to each node on this protection rings;
Step b: after the node that is in switch status receives fault message,, and judge the ingress of work tap switching path and arrived in the state of egress by inquiry ring figure and traffic table according to this fault message.
Further, egress is protected to switch or alarm to insert and is handled after receiving described warning message.
Further, cause that the factor that the topological structure of described transmission multi-protocol label switch sharing protection ring changes comprises: transmit on the multi-protocol label switch sharing protection ring and break down or node failure.
In sum, the node of method of the present invention by carrying out bridge joint or switching action is to the ingress of working LSP and can judging by the arrival state of egress, when ingress or egress can not arrive, cancel its bridge joint or switching operation, and, when ingress can not arrive egress and can arrive, send warning message to egress, thereby avoided the unnecessary waste of the network bandwidth, and can realize that fast notification egress business can not arrive.
Description of drawings
Fig. 1 is not in the topological diagram of the TMPLS protection rings under the protection LSP protection for working LSP;
Fig. 2 is in the topological diagram of the TMPLS protection rings under the protection LSP protection for working LSP;
Fig. 3 is in protection LSP protection ingress and the egress of the TMPLS protection rings topological diagram that also can't be communicated with down for working LSP;
Fig. 4 is the flow chart of embodiment of the present invention.
Embodiment
The many places fault takes place on the TMPLS protection rings; when the ingress of working LSP and egress also can't be interconnected under the protection of protection LSP; TMPLS protection rings a certain enters the node of switch status or a certain node of switch status that is in when the topology of knowing the TMPLS protection rings changes; each bar is checked through its working LSP whether ingress and egress can arrive, can carry out pressing operation by the arrival state according to its ingress and egress.
The above-mentioned node that enters switch status is meant at TMPLS shares the node that enters switch status when the topology be responsible to replace ring changes, and it is that to share the change in topology of being responsible to replace ring by this TMPLS caused that this node enters switch status; The above-mentioned node that is in switch status is meant at TMPLS shares the node that has been in switch status when the topology of being responsible to replace ring changes; The node that enters switch status is referred to as switching node with the node that is in switch status.
Above-mentioned switch status is meant that node carries out bridge operation or switching operation.
Change in topology is meant that the structure of TMPLS protection rings changes, as, break down or node failure on the TMPLS protection rings, go up can changing by the arrival state of other nodes thereby cause this node to encircle relatively.
Pressing operation is meant: node is not carried out bridge joint and switching action, will cancel corresponding bridge joint and switching operation if node has been in switch status.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated:
As shown in Figure 3; the ingress of working LSP is node A; egress is node D; professional from ingress A process Node B and node C arrival egress D; heavy line is a working LSP among the figure, and dotted line is protection LSP, and fine line is a TMPLS protection rings topological structure tag line; below be example with the section of striding and the section of striding between node E and the node F of TMPLS protection rings between Node B and node C when being in malfunction simultaneously, the present invention will be described:
As shown in Figure 4, method of the present invention comprises following steps:
The section of striding between the Node B of step 401:TMPLS protection rings and the node C breaks down, after Node B detects fault, business is bridged on the protection LSP from working LSP, professional along protecting LSP from arriving node C in the other direction, node C is switched to business on the working LSP from protection LSP again, and business arrives egress D through working LSP again;
When Node B is bridged to business on the protection LSP from working LSP, promptly be in switch status, till cancelling bridge operation.
When node C is switched to working LSP on from protecting LSP business, promptly be in switch status, till cancelling switching operation.
The node E of step 402:TMPLS protection rings and the section of striding between the node F break down, and node E or node F are notified to each node on the TPMLS protection rings topology with fault message after detecting fault;
Node E and node F can be notified to each node on the TMPLS protection rings with fault message by automatic protection switching (APS) agreement.
In the present embodiment, after node E or node F are detecting fault, fault message is notified to ingress A, Node B, node C and egress D.
Step 403: whether Node B according to this fault message, can arrive by ingress A and the egress D that inquires about ring figure and traffic table judgment task LSP after receiving fault message;
Above-mentioned ring figure has described TMPLS and has shared the topological structure that encircles, and this encircles figure can be by the human configuration generation or by discovery agreement generation automatically; Traffic table has been described ingress and the egress through every working LSP of node, and this traffic table can be generated or be generated by automatic protocol equally by human configuration, as, label distribution protocol etc.
At this, Node B will judge through its working LSP whether its ingress and egress can arrive, and in the present embodiment, only describe with the example that is treated to a working LSP to each bar, and is all identical with it to the processing procedure of other working LSP.
Whether accessibility process is for the ingress A of Node B judgment task LSP and egress D: after Node B receives the fault message of node E or node F transmission, inquiry ring figure and traffic table, get access to the topological structure of TMPLS and the ingress and the egress of working LSP, in the present embodiment, the ingress of working LSP is node A, and egress is node D, and the fault message that Node B breaks down according to the section of striding between node E and node F is judged ingress and can be arrived, that is, ingress A can arrive; Egress can not arrive, that is, egress D can not arrive.
Step 404: Node B judges that ingress A can arrive, egress D can not arrive, and this working LSP is carried out pressing operation, that is, Node B is cancelled the bridge operation to this working LSP;
After the section of striding between Node B and the node C broke down, before the section of striding between node E and the node F broke down, Node B was bridged to business on the protection LSP, and at this, Node B is promptly cancelled this bridge operation.
Step 405: meanwhile, whether node C according to this fault message, can arrive by ingress A and the egress D that inquires about ring figure and traffic table judgment task LSP after receiving fault message;
Step 406: node C judges that ingress A can not arrive, egress D can arrive, and this working LSP is carried out pressing operation, that is, node C cancels the switching operation to this working LSP;
After the section of striding between Node B and the node C breaks down; before the section of striding between node E and the node F breaks down; after Node B is bridged to business on the protection LSP; when business arrives node C; after node C switches the business on the working LSP; node C promptly enters switch status, and at this, node C promptly cancels this switching operation.
Step 407: node C inserts forward faults indication (FDI) signal as warning message to egress D direction in working LSP, notice egress business can not arrive;
Step 408: after egress D receives the FDI signal, carry out subsequent treatment at the fault of this working LSP, this method finishes.
Egress D can carry out the protection of another layer and switch or alarm subsequent treatment such as insertion after receiving the FDI signal.
Below only be to break down earlier with the section of striding between Node B and node C, after the section of striding between Node B and the node C breaks down, when Node B and node C were in switch status, the section of striding between node E and the node F broke down again and is example, the explanation that the present invention is carried out; Certainly, if the section of striding between node E and node F breaks down earlier, when breaking down after the section of striding between Node B and the node C, after Node B and node C detect fault, enter switch status, simultaneously, to the ingress of working LSP and can judging by the arrival state of egress, when switching node B determines node can not arrive the time, promptly carry out pressing operation; When switching node C judges that ingress can not arrive, promptly carry out pressing operation.
Moreover, if when section of striding between Node B and node C and the section of striding between ingress A and the Node B are in malfunction simultaneously, Node B equally also will be carried out pressing operation when judging ingress A and egress D and all can not arrive.
Certainly; the present invention also can have other embodiment; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. processing method that transmits the multi-protocol label switch sharing protection ring fault, it is characterized in that, when the topological structure that transmits multi-protocol label switch sharing protection ring changes, switching node is to the ingress of work tap switching path and can judging by the arrival state of egress, when ingress or/and egress can not arrive the time, carries out pressing operation; Wherein, described pressing operation is meant: make node not carry out bridge joint and switching action, if node is carrying out bridge joint or switching operation, then when node carries out bridge operation, cancel this bridge joint action; When node carries out switching operation, cancel this switching operation.
2. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 1; it is characterized in that described switching node maybe has been in the node of switch status for the node that enters switch status when the topological structure that transmits multi-protocol label switch sharing protection ring changes when the topological structure that transmits multi-protocol label switch sharing protection ring changes.
3. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 1; it is characterized in that, when ingress can not arrive, when egress can arrive; this node that is in switch status also sends warning message to egress, notifies its business to arrive.
4. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 3; it is characterized in that; described warning message is the described node that is in switch status, on the work tap switching path, to the forward faults index signal of egress direction insertion.
5. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 1 is characterized in that, described to the work tap switching path ingress and the process of can the arrival state judging of egress be:
Step a: when transmitting multi-protocol label switch sharing protection ring and break down, with the contiguous node of fault nidus after detecting fault, fault message is notified to each node on this protection rings;
Step b: after the described node that is in switch status receives fault message,, and judge the ingress of work tap switching path and arrived in the state of egress by inquiry ring figure and traffic table according to this fault message.
6. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 3 is characterized in that, egress is protected to switch or alarm to insert and handled after receiving described warning message.
7. the processing method of transmission multi-protocol label switch sharing protection ring fault as claimed in claim 1; it is characterized in that, cause that the factor that the topological structure of described transmission multi-protocol label switch sharing protection ring changes comprises: transmit on the multi-protocol label switch sharing protection ring and break down or node failure.
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| CN2008100081376A CN101227370B (en) | 2008-02-05 | 2008-02-05 | Method for processing fault of transferring multi-protocol label switch sharing protection ring |
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| CN101227370B true CN101227370B (en) | 2011-01-19 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101686166B (en) * | 2008-09-28 | 2012-04-04 | 华为技术有限公司 | Method, device and system for processing ring network service fault |
| CN102006214A (en) * | 2010-07-19 | 2011-04-06 | 南京邮电大学 | Shortcut protection method based on path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol) |
| CN101969382B (en) * | 2010-09-25 | 2014-07-02 | 中兴通讯股份有限公司 | Method and device for sharing service protection in mesh network |
| US8644134B2 (en) * | 2010-10-28 | 2014-02-04 | Cisco Technology, Inc. | Dual-homing for ethernet line services |
| CN102264088B (en) * | 2011-06-08 | 2017-04-05 | 中兴通讯股份有限公司 | Pseudo-wire pretection switch implementation method and device |
| CN102891787B (en) * | 2011-07-20 | 2017-10-10 | 中兴通讯股份有限公司 | Looped network tunnel configuration method, business switch method and system based on overlapping trees |
| CN102801596B (en) * | 2012-06-11 | 2015-01-21 | 华为技术有限公司 | Service processing method for ring network and network equipment |
| CN102868611B (en) * | 2012-10-09 | 2015-05-20 | 盛科网络（苏州）有限公司 | Transmitting method and transmitting device of automatic identification system (AIS) and LCK messages based on segment protection |
| CN106572024A (en) * | 2015-10-09 | 2017-04-19 | 中兴通讯股份有限公司 | Method and apparatus for preventing flow storm caused by network shared ring protection |
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| CN1756182A (en) * | 2004-09-30 | 2006-04-05 | 华为技术有限公司 | Protection switching method in multiprotocol label switching system |
| CN1816040A (en) * | 2005-02-01 | 2006-08-09 | 华为技术有限公司 | Multi-protocol label exchange-network protection switching-over method |
| CN1848844A (en) * | 2005-11-17 | 2006-10-18 | 华为技术有限公司 | Method and apparatus for realizing group protection in MPLS network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756182A (en) * | 2004-09-30 | 2006-04-05 | 华为技术有限公司 | Protection switching method in multiprotocol label switching system |
| CN1816040A (en) * | 2005-02-01 | 2006-08-09 | 华为技术有限公司 | Multi-protocol label exchange-network protection switching-over method |
| CN1848844A (en) * | 2005-11-17 | 2006-10-18 | 华为技术有限公司 | Method and apparatus for realizing group protection in MPLS network |
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