CN100372312C - Method for realizing label switching path network - Google Patents
Method for realizing label switching path network Download PDFInfo
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- CN100372312C CN100372312C CNB2004100305078A CN200410030507A CN100372312C CN 100372312 C CN100372312 C CN 100372312C CN B2004100305078 A CNB2004100305078 A CN B2004100305078A CN 200410030507 A CN200410030507 A CN 200410030507A CN 100372312 C CN100372312 C CN 100372312C
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Abstract
The present invention discloses a label switching path network test realizing method applied to multi-protocol label switching networks. The present invention mainly comprises steps that the maximum hop number of label switching paths or the maximum hop number of label switching routers in a label switching path network test is determined; a test service flow path for forming a loop circuit or a loop route is set according to the maximum hop number of label switching paths or the maximum hop number of label switching routers; the test service flow path of the loop circuit or the loop route is used for the network test. The present invention can realize the simulation of a large network by a small network through the test service flow path of the loop circuit or the loop route; thereby, the construction cost of networks can be saved, and the time of network construction and the space occupied by network equipment are also saved.
Description
Technical field
The present invention relates to data communication technology field, refer to the implementation method of LSP (label switched path) network test in a kind of MPLS (multiprotocol label switching) network especially.
Background technology
MPLS is the switching technology of a kind of the 3rd layer of route in conjunction with second layer attribute, has introduced the mechanism based on label, and it separates Route Selection and data forwarding, stipulates the path of a grouping by network by label.The MPLS network is mainly formed by transmitting and control the two large divisions, and wherein, forwarding module is mainly transmitted grouping according to the forwarding information of depositing on label information that carries in the grouping and the LSR corresponding to this label; And control module is used for transmitting correct label forwarding information between interconnected LSR.Wherein, LSR is exactly the router with MPLS function, has comprised LER (LER) and LSR (LSR) in the MPLS network.
The cascade of MPLS label is transmitted and then is to use the MPLS label stack, represent that by the label information of cascade Business Stream connects the forward-path of being formed by the LSP cascade in network, in Business Stream initiating terminal (normally network edge locations), Business Stream in network the label stack information of continuous a plurality of LSP path correspondence of process be pressed in the Business Stream packet header, for each the LSP transfer point equipment in the service flow path (Business Stream transmit in the path the terminal point of a LSP of process and the starting point of next bar LSP), by the MPLS forwarding capability, make Business Stream MPLS bag every through a LSP transfer point equipment, this LSP transfer point equipment can be selected next bar LSP according to the label stack that carries routing information.
Need every function of test LSP network (the LSP network that comprises cascade and non-cascade) in the prior art, test contents includes but not limited to the performance after Business Stream is transmitted through multistage LSP, as parameters such as time delay, shake, packet losses.
Conventional method realizes that the LSP network test is very miscellaneous, for example the LSP network with cascade forwarding capability is tested, and need build actual LSP cascade network.The workload that consumes in the test is very big, comprise setup test the machine room space, draft test plan, testing scheme, design test networking diagram, setup test equipment and material are built the test network environment, to work such as equipment are configured.
Present this LSP network test implementation method, the shortcoming below existing:
When the LSP network test, need build identical LSP jumping figure with test request (or
The label exchangeRouter hops) live network, for the LSP jumping figure (or
The label exchangeRouter hops) less little network also can realize, but for the big LSP jumping figure of test (or
The label exchangeRouter hops) macroreticular networking is then unrealistic, because the LSP quantity of the test network that need build is bigger, will the networking cost of test be increased greatly, and the networking difficulty also improves synchronously, and the progress of test is also built physical network because of needs and reduced greatly.
Summary of the invention
The problem that the present invention solves provides the implementation method of the LSP network test of a kind of little network analog macroreticular, few cascade simulation multi-cascade.
For addressing the above problem, the implementation method of a kind of LSP network test of the present invention comprises:
Determining step: maximum label switched path jumping figure or the maximum LSR jumping figure of determining the label-switched path network test;
Step is set: the test service flow path that forms loop or winding route is set according to described maximum label switched path jumping figure or maximum LSR jumping figure;
Testing procedure: utilize the test service flow path of described loop or winding route to carry out network test.
Wherein, the described step that is provided with comprises:
A) determine the test service flow path process of loop or winding route
The label exchangeRouter or label switched path;
B) determine the professional respective labels of transmitting in the test service flow path of described loop or winding route;
C) the label switched path entrance equipment that flows according to described tag configurations test service is realized the test service flow path of described loop or winding route.
Further, the label switched path entrance equipment of the described configuration testing Business Stream of step c) is the label stack that repeats the specify labels switching path in label switched path entrance equipment disposition.
Best, described label switched path cascade.
In addition, described method also comprises:
Reset step: if the maximum label switched path jumping figure of label-switched path network test or maximum LSR jumping figure are adjusted, then corresponding adjustment forms the test service flow path of new loop or winding route.
Wherein, reseting the test service flow path that the described adjustment of step forms new loop or winding route specifically comprises:
D) determine new loop or winding route test service flow path process label switched path or
Mark Sign exchangeRouter;
E) determine the professional respective labels of transmitting in the test service flow path of described new loop or winding route;
F) realize the described new loop or the test service flow path of winding route according to the label switched path entrance equipment of the new test service stream of described tag configurations.
Further, the label switched path entrance equipment of the new test service stream of step f) configuration is the new label stack that repeats the specify labels switching path in label switched path entrance equipment disposition.
Best, new label switched path cascade.
Compared with prior art, the present invention has the following advantages:
The present invention proposes to take back the LSP network test implementation method of ring or loop route, bring great flexibility to network test, only need build little test network during test, disposed a small amount of transit router, just can simulate more transit routers, test more LSP jumping figures (or
The label exchangeRouter hops) LSP forwarding capability.Thereby can realize little network analog macroreticular, few cascade simulation multi-cascade, make test LSP jumping figure or
The label exchangeWhen router hops is big, no longer need to build actual LSP jumping figure or
The label exchangeThe macroreticular of router hops.Therefore, the construction cost of network be can save, networking time and network equipment occupation space also saved.
Description of drawings
Fig. 1 is the specific embodiment flow chart of configuration loop in the implementation method of LSP network test of the present invention;
Fig. 2 is a kind of LSP cascade network environment schematic diagram in the implementation method specific embodiment of LSP network test of the present invention;
Fig. 3 is the variation schematic diagram of specific embodiment of the invention label stack in the network environment shown in Figure 2;
Fig. 4 is a specific embodiment of the invention test service flow path schematic diagram in the networking environment shown in Figure 2;
Fig. 5 is the network diagram of existing techniques in realizing LSP network test shown in Figure 2;
Fig. 6 is a kind of non-LSP cascade network environment schematic diagram in the implementation method specific embodiment of LSP network test of the present invention;
Fig. 7 is the test service flow path schematic diagram of the specific embodiment of the invention in the network environment shown in Figure 6;
Fig. 8 be in the implementation method of LSP network test of the present invention when the LSP jumping figure or
The label exchangeWhen changing, realizes router hops the flow chart of test;
Fig. 9 is the situation schematic diagram that the LSP physical network of network test in the implementation method of LSP network test of the present invention changes;
Figure 10 is a schematic diagram of readjusting loop or winding route implementing LSP network test under the network condition shown in Figure 9;
Figure 11 is a schematic diagram of realizing the LSP network test in the implementation method of LSP network test of the present invention by the label stack of adjusting LSP entrance equipment;
Figure 12 is the variation schematic diagram of specific embodiment of the invention label stack in the network environment shown in Figure 11.
Embodiment
LSP network of the present invention comprises the LSP of cascade, also comprises the LSP (being that common label is transmitted LSP) of non-cascade.Comprising the network equipment of LSP and realization LSP function in the described LSP network, is edge router at the described network equipment of network edge, and in network, the network equipment that LSP is cascaded up is a transit router.By LSP network test of the present invention, the test contents that can realize includes but not limited to that Business Stream is through the performance behind a plurality of LSP, as parameters such as time delay, shake, packet losses.
Conventional method realizes the LSP network test, need build the real network that equates scale, and the workload that consumes in building is very big, also unrealistic.The present invention introduces winding or loop thought realizes a kind of new LSP network test, can reach little network analog macroreticular, few LSP network equipment is simulated the optimization effect of many LSP network equipment.Concrete, mainly adopt following two steps: the first step, determine the maximum LSP jumping figure or the maximum of LSP network test
The label exchangeRouter hops; Second the step, according to described maximum LSP jumping figure or
Maximum label is handed over ChangeRouter hops is provided with the test service flow path that forms loop or winding route; In the 3rd step, utilize the test service flow path of described loop or winding route to carry out the corresponding network test.
LSP network is by a lot
The label exchangeRouter is formed, and comprises many LSP, and test is primarily aimed at Business Stream through a plurality of LSP or a plurality of
The label exchangePerformance behind the router, therefore, if can analog service stream through the LSP of corresponding jumping figure or
The label exchangeRouter can reach test purpose.Therefore, the present invention according to the test purpose difference, at first determines the maximum LSP jumping figure or the maximum of LSP network test in the first step for realizing the LSP network test
Mark Sign exchangeRouter hops specifically can be decided according to actual test case, if test purpose is that test service is through some
The label exchangePerformance behind the router, what then the first step was determined is maximum
The label exchangeRouter hops, if test purpose is the performance behind the some LSP of test service process, what then the first step was determined is maximum LSP jumping figure.
For realizing described second step, can repeatedly specify LSP and allow winding or the realization of the method for loop route by label, in the 3rd step, can utilize the test service flow path of described loop or winding route to carry out network test then, describe with specific embodiment below.
On common LSP network foundation of normal configuration, with reference to figure 1, Fig. 1 is a kind of embodiment flow chart of realizing loop, mainly may further comprise the steps in a test network:
At poly-s11 of step, determine the test service flow path process of loop or winding route
The label exchangeRouter or label switched path;
In order to save the network equipment, the test service stream that forms loop or winding route is a kind of more feasible mode, described loop route refers to have at least partial L SP to form loop among the LSP of test service stream process, described winding route refers to the loop route, refer to that promptly having a LSP at least among the LSP of test service stream process is behind an equipment interface inlet, again the route that goes out from same interface.Can realize test service stream repeatedly by loop or winding route
The label exchangeRouter or LSP circulation, the restriction that cycle-index is only designed in theory is not subjected to the restriction of method itself.
Further, at step s12, determine the professional respective labels of transmitting in the test service flow path of described loop or winding route, because test service forms loop or winding route, therefore the LSP of described label appointment may repeat, concrete, the LSP that label repeats appointment determines according to the corresponding LSP that forms loop or winding route;
Then at step s13, can be according to the label switched path entrance equipment of described tag configurations test service stream to realize the test service flow path of described loop or winding route, label stack that specifically can be by repeating the specify labels switching path in label switched path entrance equipment disposition is to realize the test service flow path of loop or winding route.
Be that cascade system describes LSP network test method of the present invention below with LSP.
With reference to figure 2, Fig. 2 is the network environment schematic diagram of a kind of LSP cascade of specific embodiment of the invention application, E1 and E2 are respectively two edge routers, some core routers are arranged between them, also have transit router: RA, RB, RC, RD etc., the LSP label switched path has: LSPa, LSPb, LSPc, LSPd, LSPe, LSPf etc.Each LSP is at initial router place, the start-tag number that needs configuration LSP, the start-tag of LSP number has two kinds on overall label and the local label of incoming interface, uses overall label and uses the local label of incoming interface not influence conclusion of the present invention, and what the present embodiment hypothesis was used is overall label.
Suppose that LSPa is La at the outlet label of E1, and each transit node (being transit router), LSP is respectively in the start-tag allocation situation at initial router place: LSPb is that Lb (overall situation), LSPc are that Lc (overall situation), LSPd are that Ld (overall situation), LSPe are that Le (overall situation), LSPf are Lf (overall situation) at the start-tag of RD at the start-tag of RB at the start-tag of RC at the start-tag of RB at the start-tag of RA.
Suppose to have the test service stream from E1 to E2, test this Business Stream through the performance after the multistage LSP cascade, as parameters such as time delay, shake, packet losses, in traditional method of testing, described test service flows appointed bearer path can be: the edge router E1-LSPa-that flows through〉the transit router RA-LSPb-that flows through〉the transit router RB-LSPc-that flows through〉the transit router RC-LSPd-that flows through〉edge router E2.I.e. LSPa-by path〉LSPb-〉LSPc-〉the MPLS label stack transmitted of LSPd is exactly La/Lb/Lc/Ld, and wherein La is a stack top.
Test network hereto, traditional method of testing can only be tested the performance that the cascade of above-mentioned several sections LSP is transmitted, and the cascade of two, three grades of LSP of many again tests is transmitted if desired, and conventional test methodologies can only increase the new network equipment and realize.
For this reason, the present invention is by introducing winding or loop route, more label can be pressed in the label stack of LSP entrance equipment disposition, thereby can test more multi-level LSP cascade, in theory, the restriction that the number of testable LSP cascade is only designed is not subjected to the restriction of the inventive method itself.
In normal business processing flow, when network is professional route, must prevent the route circulation, but in the network test that the present invention realizes, in order to realize simulating the macroreticular test, requirement is not done the route cycle detection or is allowed the route circulation to occur test service, and loop detection detects when routing usually, can identify test service by configuration or prefix mode, concrete routing and loop detecting method belong to techniques well known, and are not keys of the present invention, do not describe here.
In order to realize the more LSP network test of multi-cascade, the present invention can repeat to specify the label stack of LSP to realize that for example, label stack: La/Lb/Le/Lf/Lb/Lc/Ld can be pressed among the edge router E1, wherein La is a stack top by configuration.Corresponding path is: LSPa-〉LSPb-〉LSPe-〉LSPf-〉LSPb-〉LSPc-〉LSPd.Path: LSPb-wherein〉LSPe-〉LSPf is the route of loop, and the LSPb label switched path is repeated to specify in label stack, and this is unallowed when regular traffic carries out route, but to test service of the present invention, allows to occur.Allow loop, mean to allow the professional similar LSPb-of walking LSPe-the path of LSPf loop, also promptly allow label Lb/Le/Lf to be pressed in the label stack of transmitting bag.
The flow through label stack situation of change of each transit router of test service stream, with reference to shown in Figure 3, the path of test service stream process is with reference to shown in Figure 4, and like this, the transmitted test that many LSP cascade is simulated in few LSP cascade has just been finished.The method of testing of this introducing winding or loop route, brought great flexibility for the LSP network test, the tester can generate various test paths according to the intention of oneself, and be not subjected to the restriction of real network size, bring great convenience to network test.
With reference to figure 5, in order better to show the effect that the present invention produces than prior art, below the simple corresponding implementation of prior art of describing.
If adopt old test mode, test 7 grades of LSP cascade performances in the foregoing description (as parameters such as the time delay of testing 7 grades of LSP cascades, shake, packet losses), need build 7 grades of actual LSP cascade networks, as shown in Figure 5, need be on the network foundation of original Fig. 2, (number that increases router is different and different according to networking to increase by 3 new transit routers, also can only increase by 2 in this example, but networking or route difference), so not only need to increase new testing equipment, also bring the networking trouble to test, the present invention has just solved this problem.
Be that the common label pass-through mode of non-cascade is that example describes with the LSP network test below.
For a non-LSP cascade network test, the present invention realizes that the method for LSP network test is suitable equally.In this non-LSP cascade network, can make test service stream can pass through more LSP by circulation or loop route implementing LSP network test.As shown in Figure 6, the LSP network of a non-cascade supposes that E1 is L12 to the label of E2; E2 is L21 to the label of E1, for realizing the network test of more LSP jumping figures, the label stack of L12/L21/L12 can be pressed into the LSP entrance equipment E1 of test service stream, label L12 has repeated to specify a LSP from E1 to E2 in the described label stack, thereby form one from E1 to E2, again from E2 to E1, the further test service of the winding route from E1 to E2 stream again, by described test service stream can test service through the more router of multi-hop number or the performance of LSP.Concrete test path can be with reference to shown in Figure 7.
In the actual conditions, the LSP network test may change, and for example the LSP jumping figure of test service stream process is adjusted or process
The label exchangeRouter hops is adjusted, and at this moment may the amount of relating to establishes the problem of loop or winding route, and the test service flow path that only needs corresponding adjustment to form new loop or winding route during specific implementation gets final product.
Specifically reset and still take above-mentioned loop or winding routing Design, still the situation that label need repeat to specify LSP can occur in the same design,, the method for reseting is described, specifically mainly may further comprise the steps with reference to figure 8:
At step s81, determine new loop or winding route test service flow path process label switched path or
The label exchangeRouter;
Further at step s82, determine the professional respective labels of transmitting in the test service flow path of described new loop or winding route;
At last at step s83, to form the described new loop or the test service flow path of winding route, the test service flow path that specifically forms loop or winding route only need be realized by the new label stack that repeats the specify labels switching path in label switched path entrance equipment disposition according to the label switched path entrance equipment of the new test service of described tag configurations stream.
The technical scheme of in two kinds of situation above-mentioned LSP network test being adjusted further describes below, and first kind, the concrete network environment of network test changes, the LSP jumping figure of test request or
Label is handed over ChangeRouter hops may become also and may not change; Second kind, the concrete network environment of network test does not change, the LSP of test request or
The label exchangeRouter hops changes, and describes with specific embodiment respectively below.
For first kind of situation, with reference to figure 9, the physical network of network test changes among this embodiment, for example for network shown in Figure 2, the requirement of network test does not change, but change has taken place in network, in described embodiment, cancelled router RC, originally the design of the test service of 7 grades of cascades stream has become 6 grades, if still need to test the network of 7 grades of LSP cascades, then can redesign the path of test service stream, to reach the test necessary requirement, as shown in figure 10, the path of redesign has reached the requirement of 7 grades of cascades.
For second kind of situation, only need to realize that by the label stack of readjusting test service stream LSP entrance equipment disposition the label stack that disposes in the LSP entrance equipment after readjusting can reach new test request.
With reference to Figure 11,, can realize by redesign loop or winding route if test service stream needs the LSP cascade number of variations of test.For example among Figure 11, if test request no longer is 7 grades of LSP cascades in the network of Fig. 2, but need 8 grades of LSP cascades of test, then by adjusting the label stack adjustment loop or the winding route of LSP entrance equipment disposition, the RA-that increases newly of supposition in this example〉label switched path of RD is LSPad, label is Lf ', RD-〉label switched path of RB is LSPdb, label is Le ', and other label is constant.Like this, Business Stream flow through router the label stack situation of change as shown in figure 12, the path of redesign is as shown in figure 11: the flow through path of router of test service stream is: 1. → 2. → 3. → 4. → 5. → 6. → 7. → 8., utilize described test service flow path can realize the network test of 8 grades of LSP cascades.
It is above-mentioned that only the present invention will be described with preferred embodiment, non-so promptly limit to interest field of the present invention, therefore, under the situation that does not break away from inventive concept, the equivalence that all utilizations specification of the present invention and accompanying drawing content are done changes, and all reason is with being contained in the claim scope of the present invention.
Claims (8)
1. the implementation method of a label-switched path network test is applied to it is characterized in that in the multi-protocol label switching network, comprising:
Determining step: maximum label switched path jumping figure or the maximum LSR jumping figure of determining the label-switched path network test;
Step is set: the test service flow path that forms loop or winding route is set according to described maximum label switched path jumping figure or maximum LSR jumping figure;
Testing procedure: utilize the test service flow path of described loop or winding route to carry out network test.
2. the implementation method of label-switched path network test according to claim 1 is characterized in that the described step that is provided with comprises:
A) determine the LSR or the label switched path of the test service flow path process of loop or winding route;
B) determine the professional respective labels of transmitting in the test service flow path of described loop or winding route;
C) the label switched path entrance equipment that flows according to described tag configurations test service is realized the test service flow path of described loop or winding route.
3. the implementation method of label-switched path network test according to claim 2, it is characterized in that the label switched path entrance equipment of the described configuration testing Business Stream of step c) is the label stack that repeats the specify labels switching path in label switched path entrance equipment disposition.
4. according to the implementation method of claim 1,2 or 3 each described label-switched path network tests, it is characterized in that described label switched path cascade.
5. the implementation method of label-switched path network test according to claim 4 is characterized in that, also comprises:
Reset step: if the maximum label switched path jumping figure of label-switched path network test or maximum LSR jumping figure are adjusted, then corresponding adjustment forms the test service flow path of new loop or winding route.
6. the implementation method of label-switched path network according to claim 5 test is characterized in that, resets the test service flow path that the described adjustment of step forms new loop or winding route and specifically comprises:
D) determine new loop or winding route test service flow path process label switched path or
Mark Sign exchangeRouter;
E) determine the professional respective labels of transmitting in the test service flow path of described new loop or winding route;
F) realize the described new loop or the test service flow path of winding route according to the label switched path entrance equipment of the new test service stream of described tag configurations.
7. the implementation method of label-switched path network test according to claim 6, it is characterized in that the label switched path entrance equipment of the test service stream that the step f) configuration is new is the new label stack that repeats the specify labels switching path in label switched path entrance equipment disposition.
8. the implementation method of label-switched path network test according to claim 7 is characterized in that new label switched path cascade.
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| CNB2004100305078A CN100372312C (en) | 2004-03-31 | 2004-03-31 | Method for realizing label switching path network |
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| CNB2004100305078A CN100372312C (en) | 2004-03-31 | 2004-03-31 | Method for realizing label switching path network |
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| CN100550855C (en) * | 2007-02-05 | 2009-10-14 | 华为技术有限公司 | Send the method and the LSR of label distribution protocol message |
| CN101123814B (en) * | 2007-09-10 | 2010-05-12 | 北京航空航天大学 | Adjacent space multi-protocol tag switching network system and its processing method |
| CN101459547B (en) * | 2007-12-13 | 2012-09-05 | 华为技术有限公司 | Label forwarding path failure detection method and system |
| CN102195832A (en) * | 2011-05-16 | 2011-09-21 | 华为技术有限公司 | Loopback testing method, device and system |
| CN111678527B (en) * | 2020-06-12 | 2022-04-12 | 北京京东乾石科技有限公司 | Path network graph generation method and device, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6501756B1 (en) * | 1998-06-30 | 2002-12-31 | Kabushiki Kaisha Toshiba | Method of managing hop-count in label switching network and node apparatus |
| CN1394053A (en) * | 2001-06-27 | 2003-01-29 | 华为技术有限公司 | Fast protecting switching method for multi-protocol label exchange |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6501756B1 (en) * | 1998-06-30 | 2002-12-31 | Kabushiki Kaisha Toshiba | Method of managing hop-count in label switching network and node apparatus |
| CN1394053A (en) * | 2001-06-27 | 2003-01-29 | 华为技术有限公司 | Fast protecting switching method for multi-protocol label exchange |
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