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WO2008000129A1 - Procédé et dispositif de fourniture de routes d'essai et système d'essai de routage - Google Patents

Procédé et dispositif de fourniture de routes d'essai et système d'essai de routage Download PDF

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Publication number
WO2008000129A1
WO2008000129A1 PCT/CN2007/001258 CN2007001258W WO2008000129A1 WO 2008000129 A1 WO2008000129 A1 WO 2008000129A1 CN 2007001258 W CN2007001258 W CN 2007001258W WO 2008000129 A1 WO2008000129 A1 WO 2008000129A1
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WO
WIPO (PCT)
Prior art keywords
route
routes
test
route prefix
prefix
Prior art date
Application number
PCT/CN2007/001258
Other languages
English (en)
Chinese (zh)
Inventor
Yuanming Zheng
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008000129A1 publication Critical patent/WO2008000129A1/fr

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    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
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Definitions

  • the present invention relates to the field of network communication technologies, and in particular, to a method, an apparatus, and a route test system for providing a test route. Background technique
  • Border Gateway Protocol is one of the most important routing protocols on the Internet. It is the only routing protocol used between autonomous systems. Therefore, some people call BGP the heart of the Internet (BGP Is The Heart Of Integrate). . BGP has undergone different stages of development, and its functions are constantly strengthening and expanding with the growth of the Internet. From the initial basic autonomous system routing function, to aggregation, community, reflection, alliance, attenuation, capability notification, multi-protocol extension, route refresh, etc. It can be said that the development of BGP closely follows the development of the Internet, BGP on the Internet. The number of routes has also increased from a small number in 1989 to about 100,000 in 2001, and the number of autonomous systems has increased to about 9,000 in 2001. Therefore, the power and robustness of BGP is an important indicator of the core router of the face detection.
  • the existing test solution is to generate a route that conforms to the regularity of the length of the route prefix on the network, create multiple route pools with different route prefixes, and then read and send routes from the route pool to the tested router.
  • test route sent to the tested router cannot simulate the route that the router receives on the Internet, and thus cannot accurately test the performance of the router processing the Internet route.
  • Embodiments of the present invention provide a method, an apparatus, and a route test system for providing a test route. To generate a test route that conforms to the rule of the length of the network route prefix and has a random characteristic, and sends the test route to the device under test.
  • An embodiment of the present invention provides a method for providing a test route, including:
  • the number of routes of each route prefix length is calculated, and a random algorithm is used to generate random routes of various route prefix lengths corresponding to the generated number.
  • the number of the routes of the route prefix lengths is calculated, and the routes of various route prefix lengths corresponding to the number of tests are read from the generated random routes.
  • the read test route is sent to the device under test.
  • An embodiment of the present invention provides an apparatus for providing a test route, including:
  • the parameter presetting unit calculates the number of routes of various route prefix lengths and the number of routes of various route prefix lengths according to the distribution of the route on the network;
  • the random route generating unit generates a random route of each route prefix length corresponding to the generated number by using a random algorithm
  • the test route sending unit is configured to send the read test route to the device under test.
  • An embodiment of the present invention provides a route test system, including a route test device and a device under test.
  • the route test device includes a parameter presetting unit, a route generating unit, a reading unit, and a sending unit.
  • the parameter presetting unit calculates the number of routes of various routing prefix lengths and the number of routes of various routing prefix lengths according to the distribution of the network routes;
  • the random route generating unit generates a random route of various route prefix lengths corresponding to the generated number by using a random algorithm
  • the test route reading unit reads, from the generated random route, routes of various route prefix lengths corresponding to the test number;
  • the test route sending unit is configured to send the read test route to the device under test.
  • the total number of generated routes and the total number are set in advance.
  • the number of tests, the number of routes generated by the various route prefix lengths and the number of tests are calculated according to the rules of the network route distribution.
  • the random number algorithm is used to generate the generated random routes with various route prefix lengths. From the generated random routes, A route of the test number of various route prefix lengths is read, and then the read test route is sent to the device under test.
  • the method, the device or the system provided by the invention makes the route sent to the device under test not only conform to the route distribution rule of the network, but also has a random characteristic, and the test route is consistent with the route received by the device under test in the actual Internet; Test the ability of the device to process routes in the actual working environment.
  • FIG. 1 is a flowchart of a method for providing a test route according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for generating a random route according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for testing route read in an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an apparatus for providing a test route according to an embodiment of the present invention. detailed description
  • FIG. 1 is a flowchart of a method for providing a test route according to an embodiment of the present invention, including the following steps:
  • the total number of preset routes is generated, and the number of routes of various route prefix lengths is calculated according to the route distribution rule of the network, and the generated number of routes of various route prefix lengths are generated by using a random algorithm.
  • the total number of scheduled routes is calculated, and the number of routes of various route prefix lengths is calculated according to the route distribution rule of the network. From the route generated in step S01, the lengths of the various route prefixes of the test number are read. Routing; The total number of tests is not greater than the total number of generations.
  • FIG. 2 it is a flowchart of a method for generating a random route according to an embodiment of the present invention, which includes the following Steps:
  • the total number of preset routes generated, and the number of routes generated by various route prefix lengths is calculated according to the route distribution rule of the network.
  • the above route prefix is the network address part information of the route.
  • the length of the route prefix is the length of the network address part of the route (in bits), which is the mask length.
  • Table 1 lists the distribution rule of the network route prefix length (IPv4) for a certain period of time, that is, the percentage of the total route prefix occupied by various route prefixes.
  • the distribution rule is obtained by unit time statistics.
  • the preset total number of generated routes is 10 million.
  • the number of routes with a prefix length of 8 is 2000, but the first byte is removed.
  • 0, 127, and routes greater than or equal to 224 the number of valid routes is only 222. Later, there are some cases where the number of routes with a prefix length also has such a situation, so in the specific implementation, the problem of correction is involved.
  • the maximum number of routes with a prefix length of 8 is set to 222.
  • the number of routes with the prefix length of other similar cases is also set to the maximum number of valid routes of this length.
  • the number of routes with a prefix length of 31 is the total number of routes specified. The difference between the sum of the routes of all other prefix lengths. The number of generations of various prefix length routes, and the number of valid routes after correction according to the specific conditions of the prefix are shown in Table 1.
  • an array can be used, such as ULONG ulMaxPrefixIpNum[33], each element represents the number of routes with a prefix length, and ulMaxPrefixIpNum[8] represents the number of valid routes with a prefix length of 8.
  • ULONG is a 32-bit unsigned integer.
  • an array is first initialized, such as ULONG ulRoutesInfoList[10000000] to represent the generated 10 million routes.
  • routes of various prefix lengths are generated in sequence:
  • each route is generated by a pseudo-random function.
  • step S15 Determine whether the route prefix of the route prefix length already exists. If yes, delete the generated route prefix, proceed to step S13, otherwise, continue to step S15.
  • the array ulRoutesInfoList can be used as a buffer for data storage.
  • a route 10.1.160.3
  • a pseudo-random function such as mnd()
  • mnd() can be used to generate four pseudo-random numbers, each of which ranges from 0-255.
  • a route is formed, which is 32 bits in total.
  • the prefix length such as 18
  • 10.1.160.3 is represented by binary as 32bit, which is 00001010 00000001 10100000 00000011.
  • the decimal representation is 10.1.128.0. For the sake of simplicity, it stores 4 bytes when stored in a local file representing the route, which in turn is 10, 1, 128, 0.
  • step S17 Determine whether a specified number of routes of the route prefix length have been generated. If yes, proceed to step S17; otherwise, proceed to step S13.
  • the specified number is the number of routes generated by the route prefix length calculated in step S11.
  • the prefix length n + 1 determine whether n is greater than 32, if yes, continue to step S18; no ij, continue to step S13.
  • the longest prefix length of IPv4 is 32, so greater than 32 means that all routes have been generated.
  • create a .txt file first write the total number of 4 bytes of the route, here is 10 million; then write the contents of the entire array ulRoutesInfoList[10000000].
  • the above random route generation method is only a random route of the present invention.
  • the present invention may adopt other random route generation methods as needed, as long as a preset number of random routes conforming to the network route prefix length distribution rule is generated first, and thus will not be described again.
  • FIG. 3 is a flowchart of a method for testing route reading according to the present invention, including the following steps:
  • the generated route is 10 million; 4*10 million bytes of memory is allocated, and all routes are read to the memory M2. Since the 10 million routes are generated in order of various prefix lengths, the start and end positions of the route of a certain prefix length are clearly known in the memory M2.
  • steps S25 and S26 generate a random number within the range of the number of generated routes of the route prefix length n, and then sequentially read the route of the specified number of route prefixes n from the random number. It is also possible to use the range of the number of generated routes of the route prefix length n as one data. Segment, using a random method, randomly reads a route from this data segment each time until it reads a route with a specified number of route prefixes n.
  • step S27 the prefix length n + 1 , determines whether n is greater than 32. If yes, continue to step S28; otherwise, go to step S25.
  • the foregoing method for reading the test route is only a specific embodiment of the method for reading the test route in the present invention.
  • the present invention can also read the test route in other random manners, and details are not described herein again.
  • test route sending process After reading the test route, enter the test route sending process.
  • the following embodiment sends a test route to a BGP-enabled router, including the following steps:
  • the basic process of establishing a BGP session between the test tool and the router includes first establishing a TCP connection between the test tool and the device under test (DUT, device under test), the destination port number is 179, and then on the TCP connection. After BGP Open packets and BGP KeepAlive packets are sent to each other, a BGP session is established. After a BGP session is established, BGP keepalive packets are sent to each other at intervals. The BGP session can be maintained.
  • the Update packet includes an Update packet that adds a route and an Update packet that revokes the route.
  • the Update message includes ⁇ 1 ⁇ header, test route and session related attributes.
  • the Update packet of the added route is a TCP packet.
  • the TCP destination port number is 179.
  • the data part includes the Update header, and the route attributes such as Origin, As—Path, Next— Hop, Local-Preference, and each added.
  • the Update message of the revoked route is a TCP packet.
  • the TCP destination port number is 179, and the data part includes the Update packet header and the revoked routes.
  • the route includes the prefix length and prefix.
  • the specific process is: when adding and rerouting the Update message, 10.1.128.0/18 is encapsulated into the Update message, actually fill in 18 first, then fill in 3 bytes 10, 1, 128, the last 1 word Section 0 is not written to the Update message, that is, only the valid bytes indicated by the prefix length are filled. If the prefix length is greater than 24, the valid byte is 4, and 4 bytes are required. Prefix; prefix length is less than or equal to 24 and greater than 16, valid byte is 3, need to fill in 3 bytes of prefix; prefix length is less than or equal to 16 and greater than 8, valid byte is 2, need to fill in 2 bytes Prefix; prefix length is less than or equal to 8, valid byte is 1, and a 1-byte prefix is required.
  • S33 Send the Update packet to the router.
  • the test of the router also includes the route flapping.
  • the route flapping is performed by adding the route and the revoking route alternately.
  • the process of the route flapping is to send the Update packet with the added route and the revoked route to the router alternately.
  • the time interval between adding and revoking routes is set by the user.
  • a random route conforming to the online prefix length distribution rule can be generated at each test, and then directly sent to the router for testing.
  • FIG. 4 is a schematic structural diagram of an apparatus for providing a test route according to an embodiment of the present invention.
  • the apparatus 100 for providing a test route provided by the embodiment of the present invention includes a parameter preset module 110, a random route generation module 120, a test route read module 130, and a test route sending module 140.
  • the parameter preset module 110 is configured to receive a preset route total. The number of generated routes, the total number of scheduled routes, and the rules of network route distribution rules, and the number of routes generated by various route prefix lengths and the number of routes of various route prefix lengths are calculated.
  • the random route generation module 120 is configured to read the generated number of routes of the various route prefix lengths, and generate a random route of the generated number of various route prefix lengths by using a random algorithm;
  • the test route reading module 130 is configured to read The number of tests of the routes of the various route prefix lengths, and the routes of the test number are read from the generated random routes of various route prefix lengths;
  • the test route sending module 140 is configured to send the read test route to the device under test.
  • the online route distribution rule parameter and the preset route total generation number are input to the parameter preset module 110, and the parameter preset module 110 calculates the number of routes generated by various route prefix lengths.
  • the random route generation module 120 then reads the generated number of routes of the various route prefix lengths, and generates a random route of the generated number of various route prefix lengths by using a random algorithm. Will be scheduled
  • the total number of test routes is input to the parameter presetting module 110.
  • the parameter presetting module 110 calculates the number of tests for routes of various route prefix lengths. It can be understood that the total number of test routes can be input at the same time when the total number of input routes is generated.
  • the test route reading module 130 reads the number of tests of the routes of various route prefix lengths, and reads the test number of routes from the random routes of the various route prefix lengths generated above.
  • the test route sending module 140 is configured to send the read test route to the device under test 200. Therefore, the route test apparatus 100 transmits the test route conforming to the online route distribution rule and having random characteristics to the device under test 200.
  • the random route generation module includes:
  • a route prefix length extraction module configured to extract a route prefix length from the lengths of the various route prefixes
  • the determining module determines whether the number of routes having the obtained route prefix length is equal to the calculated number of routes of the calculated route prefix length, and if not equal, the generating module generates a route of the route prefix length; Yes,
  • a route prefix length is obtained from the length of the route prefix that is not obtained, until the lengths of the various route prefixes have been obtained, and routes of the various route prefix lengths are generated.
  • the test route reading module includes:
  • a first reading submodule configured to read a route of the number of the route prefix length test from the generated route of the obtained route prefix length
  • the second read submodule is configured to obtain a route prefix length from the unacquired route prefix length, until the lengths of the various route prefixes have been obtained.
  • the embodiment of the present invention further provides a route test system, including a route test device and a device under test.
  • the route test device includes a parameter presetting unit, a route generating unit, a reading unit, and a sending unit.
  • the parameter presetting unit is configured to calculate, according to an online route distribution rule parameter, a number of routes generated by various route prefix lengths and a number of routes of various route prefix lengths;
  • the route generating unit is configured to generate, according to the number of routes of the various route prefix lengths, Generating, by using a random algorithm, the generated number of random routes of various route prefix lengths;
  • the reading unit is configured to read, according to the number of tests of the routes of the various route prefix lengths, the test number of the various route prefix lengths from the generated random routes of various route prefix lengths Routing
  • the sending unit is configured to send the read test route to the device under test,
  • the device under test tests based on the test route.

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Abstract

La présente invention concerne un procédé et un dispositif de fourniture de routes d'essai. Le procédé comprend: le calcul de nombres de génération de routes dans une longueur de préfixe variée en fonction de la distribution de routes réelles d'Internet, la génération desdits nombres de routes en longueur de préfixe variée par arithmétique aléatoire; le calcul de nombres de routes d'essai en longueur de préfixe variée en fonction de la distribution de routes réelles d'Internet, permettant d'obtenir les nombres de routes d'essai en longueur variée à partir des routes aléatoires générées; la transmission desdites routes d'essai obtenues vers un équipement à l'essai. L'invention concerne également un système d'essai de routage. Grâce au procédé, dispositif ou système, les routes transmises à l'équipement en essai sont conformes à la distribution de routes réelles d'Internet et présentent un caractère aléatoire. Les routes d'essai sont conformes aux routes reçues par l'équipement à l'essai sur l'Internet réel. Par conséquent il est possible de vérifier exactement la capacité de traitement de routes réelles.
PCT/CN2007/001258 2006-06-23 2007-04-17 Procédé et dispositif de fourniture de routes d'essai et système d'essai de routage WO2008000129A1 (fr)

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