CN101527730B - Test method for obtaining load factors of router and system thereof - Google Patents
Test method for obtaining load factors of router and system thereof Download PDFInfo
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Abstract
The invention discloses a test method for obtaining load factors of a router in a BGP/MPLS VPN environment and a system thereof. The test method comprises the following steps: connecting a test instrument with a PE router in an MPLS/IP network; sending at least two test streams to the tested router by the test instrument, wherein, values of test parameters to be tested in each test stream are different, and other parameters are fixed; and recording link sharing condition in the stream output direction of the tested router, if traffic of the test stream can load sharing, judging the tested router can take the test parameters as the load factors for participating in load sharing calculation. By adopting the test method, the load factors on which the router performs VPN traffic load sharing can be conveniently and efficiently tested, and the effect for starting VPN traffic load sharing in a practical network traffic environment according to the obtained test results, which provides instruction opinions for deployment of the VPN traffic load sharing function of each equipment in a practical network, and the test results have greater reference value.
Description
Technical field
The present invention relates to the measuring technology of router flow load sharing mechanism, be meant a kind of method of testing and system that under Border Gateway Protocol/multiprotocol label switching (BGP/MPLS) VPN(Virtual Private Network) environment, obtains load factors of router especially.
Background technology
RFC2547 has defined the technical method of in multiprotocol label switching/Internet protocol (MPLS/IP) network, setting up Virtual Private Network, i.e. BGP/MPLS VPN.Along with the large scale deployment of BGP/MPLS VPN technologies in the backbone network of telecom operators, and the quick growth of the user of VPN and flow, the load balancing that in the MPLS/IP backbone network, carries out the VPN flow has been active demand.The research test of the VPN flow load factor of the elementary cell to the MPLS/IP backbone network---router becomes the basis of disposing the VPN load balancing.
At present, have the method for testing of multiple VPN flow load sharing function to router, but all there is following shortcoming and defect in these methods:
The first, concern be the equative route number and the traffic sharing effect of VPN flow load sharing under the particular flow rate environment, test result has certain limitation, to the directiveness of network actual deployment, can be not strong with reference to property and citability.
Second; The flight data recorder test mode; Can't obtain the load factor that uses when router carries out load balancing to the VPN flow; Like outer layer label, vpn label, IP source address, IP destination address, source port number and destination slogan etc., can not study router carries out load balancing under the BGP/MPLS vpn environment functional mechanism in architectonical ground.
Summary of the invention
In view of this; The objective of the invention is to propose a kind of clear box method of testing and system that under the BGP/MPLS vpn environment, obtains the load factor that uses when router carries out the VPN flow load sharing; Can pass through a series of testing procedures, the load factor that obtains router is outer layer label, vpn label, IP source address, IP destination address, source port number or destination slogan.
Based on above-mentioned purpose a kind of method of testing of under Border Gateway Protocol/multiprotocol label switching BGP/MPLS virtual private network environment, obtaining load factors of router provided by the invention, comprising:
Test instrumentation is linked to each other with Provider Edge pe router in multiprotocol label switching/Internet protocol MPLS/IP network; Test instrumentation sends at least one group of test stream to test router, and the value of a parameter to be measured is different in said every group of test stream, and other parameters are fixed;
The link sharing condition of record test router flow outgoing direction if the flow of test stream can load balancing, judges that then parameter that test router can be to be measured with this is as the participation load balancing load calculated factor.
Optional, when said parameter to be measured was IP source address, the IP source address that said each test stream is set was different in this method, and IP destination address, UDP UDP source port number, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was the IP destination address, the IP destination address that said each test stream is set was different, and IP source address, UDP source port number, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was the UDP source port number, the UDP source port number that said each test stream is set was different, and IP source address, IP destination address, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was UDP destination slogan, the UDP destination slogan that said each test stream is set was different, and IP source address, IP destination address, UDP source port number, outer layer label and vpn label are fixed; The physical link sharing condition of record test router flow outgoing direction;
When said parameter to be measured was vpn label, the vpn label that said each test stream is set was different, and IP source address, IP destination address, UDP source port number, UDP destination slogan and outer layer label are fixed;
When said parameter to be measured was outer layer label, the outer layer label that said each test stream is set was different, and IP source address, IP destination address, UDP source port number, UDP destination slogan and vpn label are fixed; The physical link sharing condition of record test router flow outgoing direction.
Optional, when said parameter to be measured was IP source address or IP destination address or UDP source port number or UDP destination slogan or outer layer label, said test instrumentation sent said one group of test stream in a VPN in this method;
When said parameter to be measured was vpn label, said test instrumentation is each one test stream in one group of VPN.
Optional, the number of many equative routes that the number of test stream links to each other with other routers more than or equal to the test router downstream direction in the said one group of test stream of this method.
Optional, this method further comprises: will carry out comprehensively the judged result of all parameters to be measured, and draw all load factors of the BGP/MPLS VPN load balancing of test router.
Optional, the said test router of this method places the MPLS/IP network to become the core P of operator router, and has many equal-cost links to link to each other with other routers; Use two IP device test instrumentation port simulant-client edge C E routers, respectively with the MPLS/IP network in different operators edge pe router link to each other, and two ce routers can normally be exchanged visits.
Optional; This method further comprises: judging whether through flow on the test router VPN flow outgoing direction link can load balancing; If at least two links of test router VPN flow outgoing direction, flow is arranged all; The flow of then judging test stream can load balancing, otherwise, explain that flow is not responsible for sharing.
Based on above-mentioned purpose, the present invention also provides a kind of test macro based on said method, it is characterized in that, comprising: test router places multiprotocol label switching/Internet protocol MPLS/IP network, and has many equal-cost links to link to each other with other routers; IP device test instrumentation port simulant-client edge C E router is set, links to each other with Provider Edge pe router in the MPLS/IP network.
Optional, two IP device test instrumentation port simulant-client edge C E routers are set in this system, respectively with the MPLS/IP network in different operators edge pe router link to each other, and two ce routers can normally be exchanged visits.
Optional, the said test router of this system places the MPLS/IP network to become the core P of operator router.
Saidly can find out from top; Method of testing and the system that under the BGP/MPLS vpn environment, obtains load factors of router provided by the invention; Can test out router easily and efficiently and carry out the load factor of VPN flow load sharing time institute foundation; And according to the test result of obtaining; The effect of VPN flow load sharing is opened in deduction under the real network traffic environment, to the deployment of each equipment VPN flow load sharing function in the real network instruction is provided, and test result also will have more reference value.
Description of drawings
Fig. 1 tests whole topological sketch map for the embodiment of the invention;
Fig. 2 is used to accomplish the simplification topology sketch map of most of test event for the embodiment of the invention;
Fig. 3 is used to accomplish the simplification topology sketch map of fraction test event for the embodiment of the invention;
Fig. 4 is an embodiment of the invention testing process sketch map.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, to further explain of the present invention.
To achieve these goals; Core concept of the present invention is: build 6 kinds of discharge models; In every kind of discharge model; It is a plurality of that these 6 candidate's load factors of outer layer label, vpn label, IP source address, IP destination address, source port number and destination slogan have only the value of a factor, and the value of other factors is fixed.Through on test router, observing the actual loading sharing condition of VPN flow, confirm whether the variable factor of value is the load factor of BGP/MPLS VPN load balancing.After process test under 6 kinds of discharge model environment, can obtain the load factor of the BGP/MPLS VPN load balancing of test router.
Technical scheme of the present invention comprises: test instrumentation is linked to each other with Provider Edge pe router in multiprotocol label switching/Internet protocol MPLS/IP network; Test instrumentation sends at least one group of test stream to test router, and the value of a parameter to be measured is different in said every group of test stream, and other parameters are fixed; The link sharing condition of record test router flow outgoing direction if the flow of test stream can load balancing, judges that then parameter that test router can be to be measured with this is as the participation load balancing load calculated factor.
In the corresponding system of the present invention, test router is as becoming P router (operator's core router) in the MPLS/IP network, and has many equal-cost links to link to each other with other routers.Use 2 IP device test instrumentation ports simulation CE (client edge) routers, respectively with the MPLS/IP network in different PE (Provider Edge) router link to each other, and two ce routers can normally be exchanged visits.On test router, open function to BGP/MPLS VPN flow load sharing.
Wherein, two ce routers can normally be exchanged visits not necessarily, as long as it is just passable dependable flow can to send to test router.As the test instrumentation of accepting flow, be used for further verifying whether flow produces losing of packet at carrier network.For some special networks topological structures, such as next path of pe router many situation is arranged, test router also can be the pe router in the MPLS/IP network.
Test instrumentation is sent out stream according to 6 kinds of discharge models: in (1) one group of test stream corresponding with the 1st kind of discharge model, IP source address has a plurality of, and IP destination address, outer layer label, vpn label, source port number and destination slogan are fixed; (2) in one group of test stream corresponding with the 2nd kind of discharge model, the IP destination address has a plurality of, and IP source address, outer layer label, vpn label, source port number and destination slogan are fixed; (3) in one group of test stream corresponding with the 3rd kind of discharge model, source port number has a plurality of, and IP source address, IP destination address, outer layer label, vpn label, destination slogan are fixed; (4) in one group of test stream corresponding with the 4th kind of discharge model, the destination slogan has a plurality of, and IP source address, IP destination address, outer layer label, vpn label, source port number are fixed; (5) in one group of test stream corresponding with the 5th kind of discharge model, vpn label has a plurality of, and IP source address, IP destination address, outer layer label, source port number and destination slogan are fixed; (6) in one group of test stream corresponding with the 6th kind of discharge model, outer layer label has a plurality of, and IP source address, IP destination address, source port number, vpn label and destination slogan are fixed.It is a plurality of having only the value of this parameter of parameter to be measured through every kind of discharge model; Other parameters are fixed; Can infer whether the parameter of on-fixed numerical value is load factor according to the result of actual flow load balancing on the test router, thereby obtain the load factor that test router carries out the VPN flow load sharing.Wherein, generally speaking, the number of many equative routes that the quantity of said parameter value to be measured (i.e. the number of test stream in one group of test stream) should link to each other with other routers more than or equal to the test router downstream direction.
Below in conjunction with accompanying drawing and embodiment the present invention is done explanation further.
The overall topology of test is as shown in Figure 1, is typical B GP/MPLS vpn environment comparatively, and Tester1 and Tester2 are respectively 2 test instrumentation ports and are used to simulate 2 client edge router; PE-1, PE-2, P-1, P-2, P-3 are router device.
For PE-1 and PE-2 dispose 5 VPN instance respectively, Tester1 links to each other with PE-2 with PE-1 through the mode of ethernet sub-interface with Tester2, and the corresponding VPN instance of each sub-interface is then according to having 5 VPN among present embodiment Fig. 1.Tester1 injects 10 route: 10.0.1.0/24 respectively in 5 VPN, 10.0.2.0/24, and 10.0.3.0/24 ..., 10.0.10.0/24.Tester2 annotates 10 route: 20.0.1.0/24 respectively in 5 VPN, 20.0.2.0/24, and 20.0.3.0/24 ..., 20.0.10.0/24.Test router can be selected any apparatus among P-1, P-2 and the P-3, describes for convenient, and selecting test router in the present embodiment is P-1 equipment.
Fig. 2 is the topological environmental of S401 to S410 step, in order to simplify the operation, compares with whole topological diagram 1, and Fig. 2 has interrupted between P-1 and the P-3, the link between P-3 and the PE-2.
(1) IP source address has a plurality ofly, and IP destination address, outer layer label, vpn label, source port number and destination slogan are fixed:
Step S401, Tester1 send 10 tests and flow to Tester2 in 1 VPN, IP bag length is 256 bytes; The flow size is 10000PPS, and discharge model is: IP source address is 10.0.1.1/32---10.0.1.10/32, i.e. 10.0.1.1/32; 10.0.1.2/32,10.0.1.3/32 ...; 10.0.1.10/32 the IP destination address is 20.0.1.1/32, UDP (UDP) source port number and destination slogan are fixed.When flow arrives PE-1; PE-1 can stamp two-layer label on packet; Discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32---10.0.1.10/32; The IP destination address is 20.0.1.1/32, and outer layer label, vpn label, UDP source port number and destination slogan are fixed.
Step S402 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then IP source address is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
Wherein, If router does not have the function to BGP/MPLS VPN flow load sharing; Said judging whether can load balancing, can adopt and judge flow on the test router VPN flow outgoing direction link, if flow is all arranged 2 of test router VPN flow outgoing direction or 2 on uplink; Explain that then test router can be with IP source address as participating in the load balancing load calculated factor; Otherwise, explain that flow is not responsible for sharing, test router can not be with IP source address as participating in the load balancing load calculated factor.Following steps S404, S406, S408, S410, S412 can adopt this mode to judge.
(2) the IP destination address has a plurality ofly, and IP source address, outer layer label, vpn label, source port number and destination slogan are fixed:
Step S403, Tester1 send 10 tests and flow to Tester2 in 1 VPN, long 256 bytes of IP bag; Flow size 10000PPS, discharge model is: IP source address is 10.0.1.1/32, the IP destination address is 20.0.1.1/32---20.0.1.10/32; Be 20.0.1.1/32,20.0.1.2/32,20.0.1.3/32; ..., 20.0.1.10/32, UDP source port number and destination slogan are fixed.When flow arrives PE-1; PE-1 can stamp two-layer label on packet; Discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32; The IP destination address is 20.0.1.1/32---20.0.1.10/32, and outer layer label, vpn label, UDP source port number and destination slogan are fixed.
Step S404 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then the IP destination address is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
(3) source port number has a plurality ofly, and IP source address, IP destination address, outer layer label, vpn label, destination slogan are fixed:
Step S405; Tester1 sends 10 tests and flow to Tester2 in 1 VPN, long 256 bytes of IP bag, flow size 10000PPS; Discharge model is: IP source address is 10.0.1.1/32; The IP destination address is 20.0.1.1/32, and the UDP source port number is any 10 port numbers, and UDP destination slogan is fixed.When flow arrives PE-1; PE-1 can stamp two-layer label on packet; Discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32, and outer layer label and vpn label are fixed; The UDP source port number is any 10 port numbers, and UDP destination slogan is fixed.
Step S406 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then the UDP source port number is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
(4) the destination slogan has a plurality ofly, and IP source address, IP destination address, outer layer label, vpn label, source port number are fixed:
Step S407; Tester1 sends 10 tests and flow to Tester2 in 1 VPN, long 256 bytes of IP bag, flow size 10000PPS; Discharge model is: IP source address is 10.0.1.1/32; The IP destination address is 20.0.1.1/32, and the UDP source port number is fixed, and UDP destination slogan is any 10 port numbers.When flow arrives PE-1; PE-1 can stamp two-layer label on packet; Discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32, and outer layer label and vpn label are fixed; The UDP source port number is fixed, and UDP destination slogan is any 10 port numbers.
Step S408 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then UDP destination slogan is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
(5) vpn label has a plurality ofly, and IP source address, IP destination address, outer layer label, source port number and destination slogan are fixed:
Step S409; Tester1 each 1 test in 5 VPN flow to Tester2, totally 5 streams, long 256 bytes of IP bag; Flow size 10000PPS; Discharge model in each VPN all is: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32, and UDP source port number and destination slogan are fixed.When flow arrives PE-1; PE-1 can stamp two-layer label on packet; Discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32, and outer layer label is fixed; Vpn label has 5 different values, and UDP source port number and destination slogan are fixed.
Step S410 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then vpn label is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
(6) outer layer label has a plurality ofly, and IP source address, IP destination address, source port number, vpn label and destination slogan are fixed:
Fig. 3 is the topological environmental of S411 to S412 step, in order to simplify the operation, compares with whole topological diagram 1, and Fig. 3 has interrupted between P-1 and the P-2, a link between P-1 and the P-3.
Step S411, Tester1 send 10 tests and flow to Tester2 in 1 VPN, long 256 bytes of IP bag; Flow size 10000PPS; Discharge model is: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32, and UDP source port number and destination slogan are fixed.When flow arrives PE-1; PE-1 can stamp two-layer label on packet, discharge model was when then flow arrived P-1: IP source address is 10.0.1.1/32, and the IP destination address is 20.0.1.1/32; Outer layer label has two numerical value, and vpn label, UDP source port number and destination slogan are fixed.
Step S412 checks flow load sharing situation and record on P-1 and link that P-2 links to each other.If flow can load balancing, explain that then outer layer label is that test router carries out one of load factor of load balancing to BGP/MPLS VPN flow.
Above-mentioned (1)-(6) group step is not necessarily carried out in order successively, and can select wherein a group or more step execution arbitrarily according to different needs, such as the load sharing condition that only need test vpn label, then only carries out (5).
After executing all test processs, can also further carry out following steps:
Step S413; The load factor that obtains in the comprehensive above step; Being about to judged result carries out comprehensively; Draw all load factors of the BGP/MPLS VPN load balancing of test router, promptly test router can be with which factor in outer layer label, vpn label, IP source address, IP destination address, source port number or the destination interface as participating in the load balancing load calculated factor.
This step S413 can unify summary report by testing equipment, also can artificially accomplish.
Above-described specific embodiment is merely specific embodiment of the present invention, is not limited to the present invention, and is all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of testing of under Border Gateway Protocol/multiprotocol label switching BGP/MPLS virtual private network environment, obtaining load factors of router is characterized in that, comprising:
Test instrumentation is linked to each other with Provider Edge pe router in multiprotocol label switching/Internet protocol MPLS/IP network; Test instrumentation sends at least one group of test stream to test router, and the value of a parameter to be measured in each bar test stream during every group of test flowed is different, and other parameters are fixed; Said test router is other routers that said Provider Edge pe router perhaps links to each other with said Provider Edge pe router;
The link sharing condition of record test router flow outgoing direction if the flow of test stream can load balancing, judges that then parameter that test router can be to be measured with this is as the participation load balancing load calculated factor.
2. method according to claim 1; It is characterized in that; When said parameter to be measured is IP source address; The IP source address that each bar test stream in said every group of test stream is set is different, and IP destination address, UDP UDP source port number, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was the IP destination address, the IP destination address that each the bar test stream in said every group of test stream is set was different, and IP source address, UDP source port number, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was the UDP source port number, the UDP source port number that each the bar test stream in said every group of test stream is set was different, and IP source address, IP destination address, UDP destination slogan, outer layer label and vpn label are fixed;
When said parameter to be measured was UDP destination slogan, the UDP destination slogan that each the bar test stream in said every group of test stream is set was different, and IP source address, IP destination address, UDP source port number, outer layer label and vpn label are fixed; The physical link sharing condition of record test router flow outgoing direction;
When said parameter to be measured was vpn label, the vpn label that each the bar test stream in said every group of test stream is set was different, and IP source address, IP destination address, UDP source port number, UDP destination slogan and outer layer label are fixed;
When said parameter to be measured was outer layer label, the outer layer label that each the bar test stream in said every group of test stream is set was different, and IP source address, IP destination address, UDP source port number, UDP destination slogan and vpn label are fixed; The physical link sharing condition of record test router flow outgoing direction.
3. method according to claim 2; It is characterized in that; When said parameter to be measured was IP source address or IP destination address or UDP source port number or UDP destination slogan or outer layer label, said test instrumentation sent said one group of test stream in a VPN;
When said parameter to be measured is vpn label, each one test stream in said test instrumentation each VPN in one group of VPN.
4. according to any described method of claim 1 to 3, it is characterized in that the number of many equative routes that the number of test stream links to each other with other routers more than or equal to the test router downstream direction in said one group of test stream.
5. method according to claim 1 is characterized in that, this method further comprises: will carry out comprehensively the judged result of all parameters to be measured, and draw all load factors of the BGP/MPLS VPN load balancing of test router.
6. method according to claim 1 is characterized in that, said test router places the MPLS/IP network to become the core P of operator router, and has many equal-cost links to link to each other with other routers; Use two test instrumentation port simulant-client edge C E routers, respectively with the MPLS/IP network in different operators edge pe router link to each other, and two ce routers can normally be exchanged visits.
7. method according to claim 1; It is characterized in that; This method further comprises: judging whether through flow on the test router VPN flow outgoing direction link can load balancing, if at least two links of test router VPN flow outgoing direction, flow is arranged all, judges that then the flow of test stream can load balancing; Otherwise, explain that flow is not by load balancing.
8. based on the test macro of any said method of claim 1-7, it is characterized in that, comprising: test router places multiprotocol label switching/Internet protocol MPLS/IP network, and has many equal-cost links to link to each other with other routers; Test instrumentation port simulant-client edge C E router is set, links to each other with Provider Edge pe router in the MPLS/IP network.
9. system according to claim 8 is characterized in that, two test instrumentation port simulant-client edge C E routers are set, respectively with the MPLS/IP network in different operators edge pe router link to each other, and two ce routers can normally be exchanged visits.
10. system according to claim 8 is characterized in that, said test router places the MPLS/IP network to become the core P of operator router.
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