CN100463418C - Network performance test method, system and network device - Google Patents
Network performance test method, system and network device Download PDFInfo
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Abstract
This invention discloses one network property test method, which comprises the following steps: generating by analogue one test operation flow same to business flow to be tested; sending the test business from network start to test terminal; testing the network property according to the got test business on test terminal; processing the test business into test start for back business test. This invention also discloses one network property test system, which comprises start network device and test terminal device and test management device.
Description
Technical field
The present invention relates to network communications technology field, be specifically related to a kind of network performance test method, system and the network equipment.
Background technology
OAM (Operations, Administration and Maintenance) function is very important in public telecom network, and it can simplify network operation, supervising network performance and reduction network operation cost.In the network of service quality that provides safeguard, OAM(Operation Administration Maintenance) is particularly important.Actual needs according to the carrier network operation is divided into three major types with Network Management work usually, and wherein, operation and management mainly are meant finishes daily network and professional analysis, prediction, planning and the configuration effort that carries out; Maintenance mainly is the regular job activity that the test of network and business thereof and fault management etc. are carried out.OAM mechanism not only will be prevented the generation of network failure, and need to realize rapid diagnosis and location to network failure, finally improves the availability of network and to quality of services for users.
In order to strengthen the telecommunications characteristic of Ethernet, a kind of new Ethernet OAM (IEEE802.3ah standard) mechanism is disclosed in the prior art.The substandard OAM mechanism of this new IEEE802.3ah, mainly be between traditional MAC (medium access control) layer and PHY (physics) layer, to have introduced an OAM sublayer, and by between equipment, transmitting OAM information, and then realization is to the monitoring of network, the basic principle of this OAM and message format, specifically as shown in Figure 1.
As shown in Figure 1, the substandard OAM of this IEEE802.3ah sublayer mainly is to insert the OAM message at outbound course, resolves and shunting OAM message at input direction.Wherein the OAM message is consistent with traditional ethernet frame format, just redetermination a kind of OAM type.This OAM mechanism specifically can be monitored link by modes such as physics PING, loopback and remote alarms.
The process of link being monitored by physics PING is as shown in Figure 2:
PE (Provider Edge) equipment is initiated a PING request, and CE (client edge) this request of device responds after PE equipment is received and replied, obtains subscriber's line and judges normally.In actual use, PE equipment is the equipment of telecommunication bureau side, and CE equipment is the equipment in the user family, as the IPTN in the user family (IP Telecommunication Network) terminal etc.Need to prove that the PING here is a kind of PING operation of physical layer, it is different from IP PING operation commonly used, at be MAC Address, having only target MAC (Media Access Control) address is that oneself subscriber equipment just can produce and replys.The main purpose of physics PING is to check whether the link of subscribers feeder and terminal device is working properly.
Line loopback also is a kind of common positioning means, and receiving terminal is directly linked transmitting terminal, and transmit leg just can be checked the same that whether data of reception send with oneself like this, thereby judges whether it is that the internal processes of receiving equipment itself has problem.When packet loss and error code appear in user link, actually or can cause by the circuit that loopback comes failure judgement equipment to cause is set.
Remote alarm is meant that the circuit when a direction breaks down, and when detecting bigger error code such as subscriber equipment, can construct special OAM message, and from notifying PE equipment in the other direction, its process as shown in Figure 3.
These OAM mechanism have strengthened the fault location ability of Ethernet to a certain extent, but Ethernet OAM has following problem still unresolved:
Another prior art related to the present invention can be with reference to No. the 20050169182nd, U.S. Patent Application Publication, the document has been announced a kind of OAM method of testing based on MPLS, this method is to insert the MPLS-OAM test frame to be used for checking connective in normal MPLS stream, packet loss etc., so can be operator applied in network performance test fast is provided, optimize its VPN service.But be that traditional OAM tests or above-mentioned MPLS-OAM only is the test that rests on below three layers, and can't solve the network actual conditions that (comprise IP (Internet Protocol) layer, TCP/UDP (transmission control protocol/user datagram protocol) layer and higher level) more than two layers.Many times network can not determine the more break-make of high-level business in the break-make of two layers even three layers, in actual applications, a lot of equipment is arranged in the network of operator, management difficulty is quite big, if the keeper just may cause traffic issues to the administration configuration of some equipment wherein is improper, for example the configuration of this device A CL rule is inconsiderate, may cause a lot of VPN users' service disconnection; Cause customer complaint, at this moment operator is if adopt traditional means to detect, because network all is unobstructed at two layers and three layers, thus can't fault location, customer issue is difficult to solution.
By above description as can be seen, Ethernet OAM is positioned at two layers in the network layer, and the forward-path of test is symmetrical.But the practical business of user on network, a lot of all is the application that is in network layer system agreement on the middle and senior level, and mostly the path is asymmetric under the situation, and from flow for most access the flow of uplink and downlink also be asymmetric.In this case, how, the user to ensure also there is not effective solution at present for providing professional.
Summary of the invention
The purpose of this invention is to provide a kind of network performance test method and system, can't provide in the prior art based on professional test itself, realize rapid diagnosis and location, improve the availability of network and quality of services for users to network failure to overcome.
Another object of the present invention provides a kind of network equipment, network being provided based on professional test itself, and realizes quick location to network failure.
For this reason, the invention provides following technical scheme:
A kind of network performance test method, described method comprises step:
A, to tested point device and the test end device carry out testing setup;
B, test the point device place, carrying the test service stream of concrete service application according to testing setup simulation one;
C, described test service stream is mail to the test end device from the test point device of described network;
D, obtain test service stream, use for analyzing at described test end device; Perhaps the test service stream that obtains is looped back to described test and plays point device, carry out the return operational trials.
Described step B is specially:
By predetermined ratio described test service stream is inserted in the general traffics, perhaps
End to insert described test service stream after the general traffics.
Described testing setup comprises: set the analog configuration that is used to generate test service stream, and set in the following information at least one: test sign, timestamp, package identification.
Described testing setup comprises to be set the identification setting of test end device and loopback.
Described loopback is set at asymmetrical loopback and sets, and comprises the packet in the test service stream is returned speed or the setting of packet size.
A kind of network performance testing system, comprise: the test that links to each other by network plays point device and test end device, described test plays the testing setup insertion test service stream of point device according to the test and management equipment disposition, and described test service stream is mail to described test end device; Described test end device extracts described test service stream according to the testing setup of configuration, and according to the service quality of the test service stream that extracts for the described network of analysis; Wherein,
Described test plays point device and comprises:
The testing setup memory cell is used to store the testing setup that described test and management equipment sends;
Test stream insertion unit is coupled in described testing setup memory cell, is used for generating test service stream according to the testing setup simulation of storage, and is inserted in the general traffics of having tested the point device transmission;
Starting point test stream extraction unit is used for extracting the test service stream that returns from the test end device from the general traffics that described test point device receives;
Described test end device comprises:
The testing setup memory cell is used to store the testing setup that described test and management equipment sends;
Terminal test stream extraction unit is used for extracting corresponding test service stream according to the Business Stream that described testing setup receives from described test end device;
The terminal test processing unit is coupled in described testing setup memory cell and described terminal test stream extraction unit respectively, is used for according to testing setup test service being flowed loopback to having tested point device.
Described test plays point device and described test end device is respectively the network equipment with CPU and memory function.
The testing setup of described end device comprises asymmetrical loopback setting.
A kind of network performance testing system comprises network management device, has tested point device and test end device, and described network management device is used for that test to appointment plays point device and the test end device issues testing setup; Described test plays point device and generates test service stream according to above-mentioned testing setup; Described test end device test the test service stream that point device is sent according to testing setup identification, and generation is returned test service and flowed to described test starting point device orientation transmission according to testing setup.
The testing setup, the packet rate of returning test service stream that the above-mentioned setting of test end device foundation generates or the test service stream that varies in size and send that the testing setup of test end device are comprised asymmetric flow in the test point device.
A kind of test plays point device, has network management interface, is used for the testing setup that the acceptance test management equipment sends, and this test plays point device and also comprises:
The testing setup memory cell is used to store the testing setup that receives from test and management equipment;
Test stream inserts the unit, and the test service that simulates based on concrete application according to described testing setup flows, and this test service is flowed to the test terminal point network equipment transmission of testing setup appointment.
Described test plays point device and also comprises:
Starting point test stream extraction unit is used to discern the test service stream that returns from the reception of the test terminal point network equipment, and the test service stream that this returns is extracted, and uses for administrative analysis.
Described testing setup comprises: set the analog configuration that is used to generate test service stream, set the ratio of test service stream and general traffics, and set in the following information at least one: test sign, timestamp, package identification.
A kind of test end device has network management interface, is used for the testing setup that the acceptance test management equipment sends, and this test end device also comprises:
The testing setup memory cell is used to store the testing setup that receives from test and management equipment;
Terminal test stream extraction unit is used for extracting corresponding test service stream according to the Business Stream that described testing setup receives from the described test terminal point network equipment.
Described test end device also comprises:
The terminal test processing unit is used for according to testing setup test service being flowed loopback and gives the test starting point network equipment.
By above technical scheme provided by the invention as can be seen, the input direction of the Business Stream inbound port of the present invention by playing point device at network test, the test service stream that simulation is identical with concrete service application form is inserted into and mails to the test end device in the general traffics; This test service stream is the same with general traffics, to the normal forwarding process of testing the real network equipment between terminal point, arrives the test end device through the test starting point; Outbound port at the test end device extracts this test service stream, and it is carried out the OAM statistics, thereby has realized the professional OAM test of network end-to-end, such as, continuity testing, packet loss test, bandwidth test etc.Because test service stream is identical with the Service stream formats of practical application, thereby can detect the OAM(Operation Administration Maintenance) of the above network of MAC layer; By the address information in the test service stream of test end device replacing extraction and the number of Frame size and/or return Frame, and the test service after will handling stream is looped back to by symmetric path or asymmetrical paths and test point device and carry out non-symmetrical service and test, and further detects the situation of back haul link.Therefore, utilize the present invention, can for user or Virtual network operator provide based on real network, OAM test end to end, comprehensively, rapidly, diagnosis and locating network fault exactly, and then improve the availability of network and to quality of services for users.
Description of drawings
Fig. 1 is the operation maintenance and the administrative mechanism schematic diagram of the Ethernet of 802.3ah standard to describe;
Fig. 2 is by physics PING or the line loopback schematic diagram to the link monitoring process in the 802.3ah standard;
Fig. 3 is by the schematic diagram of remote alarm to the link monitoring process in the 802.3ah standard;
Fig. 4 is the realization flow figure of the inventive method;
Fig. 5 is the VPN networking structure schematic diagram of same L2TP;
Fig. 6 is the networking schematic diagram of system of the present invention.
Embodiment
Core of the present invention is the input direction at the Business Stream inbound port of having tested point device, simulate a test service stream that carries concrete service application, and make and carry information such as test sign or timestamp in this test service stream, be inserted into the test end device that mails to test service stream in the general traffics in the test starting point then; Test service stream arrives the test end device through normal the forwarding; After extracting this test service stream according to the test sign, test end device place can directly carry out analysis based on business, also test service stream can be looped back to and test point device, the test service stream that returns from the test end device be analyzed by having tested point device.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
The present technique field personnel know, along with continuous lifting and the development of Ethernet bandwidth technology and the raising of whole net QoS (service quality) supportability of user's request, network has been a kind of requirement and trend to the business that the user provided end to end, had SLA (service-level agreement) guarantee on the one hand.In addition on the one hand, though the network of operator is perfect in continuous dilatation, the network handling capacity is quite huge, but this does not also mean that, the various practical application business that insert the user can both be transmitted on carrier network smoothly, and as previously mentioned, the quality of network can not determine professional quality.But how to verify whether service that network provides satisfies the requirement of SLA, also do not have a kind of method to realize end-to-end test based on business to the service quality that network provides at present, the present invention promptly adapts to this demand and proposes.
Before the test beginning, at first need a point device and the end device of initiating test are carried out testing setup, at least need to allow tested point device know the test end device correct address information and how to generate Business Stream, it is analog configuration, analog configuration can be by writing the byte of the length-specific that can characterize service application to be tested in the register that plays point device, generate test service stream then, and then by its hardware is inserted; Secondly both sides need know how to identify and test service stream is received in identification, promptly set test sign or timestamp or packet ID, and whether setting such as loopback test, and identification and loopback are set can be by issuing the acl rule realization; If test and user's regular traffic separate, also can not set the test sign, because do not need to discern under the situation of having only test service stream to exist, can cooperate test by timestamp or the packet ID that sets test service stream; Carry out the one way test iff needs and also do not need to carry out the loopback setting; If be with build-in test, can insert the setting of speed; If carry out asymmetric flow rate test, speed or packet size that loopback is set can be carried out corresponding modification; More than describe and show that the present invention has suitable flexibility on testing setup.Above-mentioned testing setup generally is configured test starting point and end device by the test and management passage by test and management center or webmaster, testing setup itself also can be undertaken by the mutual negotiation method of equipment, only need and need the essential informations such as type of service of test to inform point device with the end device address information as management equipment, other testing setup can be consulted definite or prior static configuration mutually by the equipment both sides and realize.Below further describe concrete enforcement of the present invention:
With reference to the flow chart of the inventive method shown in Figure 4, the inventive method may further comprise the steps:
At first, after finishing testing setup, in step 401: generate test service stream.Inbound port at the Business Stream of having tested point device, simulation generates the test service stream based on this service application according to testing setup, this test service stream just can comprise the information that characterizes this application like this, be MAC layer some information of above (comprising IP layer, TCP/UDP layer and higher level), for example when business is FTP (file transfer protocol (FTP)), the message format of test service stream generates according to File Transfer Protocol and address information, and in general port is 21.
Step 402: insert test service stream at the inbound port place of test starting point.
Consider the advantage of band build-in test, can according to testing setup before the normal forwarding process of business data packet, by a certain percentage test service stream be inserted in the general traffics, respectively account for 50% flow as test service stream and general traffics.Can certainly end to insert test service stream after the general traffics.
The insertion of test service stream can cooperate by hardware finishes (can certainly realize by the mode of software), and detailed process is as follows:
Mo Ni service application type and testing setup as required, packet attribute byte content with the test service stream that generates, content as certain byte before the packet header: target MAC (Media Access Control) address, source MAC, purpose IP address, source IP address, length/type, subtype, version number, port numbers, information such as coding write test service stream feature register, hardware reads these feature register, and insert payload automatically and fill word (payload and filling word are set and can be included in the testing setup), and insert the test sign according to testing setup automatically, among timestamp or the packet ID at least one, these information can be inserted in the payload, or the MAC head of packet or the first-class any assigned address of IP.
The required payload data of test stream packets is in advance in the write memory, from memory, read the payload data of respective length during insertion according to the data packet length information in the test service stream feature register, also can produce the required payload data of test stream packets at random.
The insertion speed of test service stream can be regulated according to the flow size of test service stream.The insertion of test service stream can with the general traffics mutual exclusion, that is to say, according to actual needs, when test, need cut off normal Business Stream; Also can carry out simultaneously, respectively account for 50% flow etc. such as test service stream and general traffics according to certain ratio.
In step 403: transmitted test Business Stream between according to the node of normal forwarding process at network of business.
These test service flow field simulations the Business Stream of concrete service application, so mail to the process of test end device from the test point device, each network equipment is identical to a test service circulation decision-making, at apparatus for network node, just look like that general traffics are the same, according to its destination address that comprises, carry out the forwarding process of general traffics.
After the test service circulation is dealt into the test end device, just these Business Streams can be extracted, it is analyzed, thereby determine network operation situation.
Step 404: detect network performance according to the test service stream that obtains at the test terminal point.
As previously mentioned, the test end device can utilize ACL to remove to discern test sign or the timestamp or the packet ID of test service stream according to testing setup, thereby extract corresponding test service stream, be sent to the capable analysis of upper layer software (applications), such as, when test service stream comprises timestamp, can determine the connection speed of point device and end device or time delay etc. according to the number that receives packet in the unit interval, these will describe in detail respectively in the back.Except direct processing, the path of considering user's up-downgoing under most of situation is asymmetric, can also change step 405 over to.
Step 405: carry out loopback test, in this step, end device is looped back to the test starting point after the test service stream that extracts is handled, carry out the return operational trials, the process of returning is just according to testing setup, utilizes acl rule that the purpose in packet header and source address etc. are done oppositely to have sent to point device after the corresponding modification.When needs carry out the asymmetric test of flow, what use such as the user is that ADSL inserts or the asymmetric VPN of up-downgoing when inserting, the bandwidth of its up-downgoing is asymmetric, end device can change transmission rate or length of data package according to the analog configuration in the testing setup, test to simulate the speed of promising to undertake to user's up-downgoing, whole like this test will be more near the real practical situation of user, and the location of network failure will be more accurately with complete.
Test terminal point and test starting point mainly can be carried out following applied in network performance test.
(1) statistics of connectedness and packet loss:
Packet number according to packet number that receives in the certain hour and transmission compares acquisition.Go out the number of the packet that receives in the certain hour by hardware statistics, calculate packet loss by software according to the number that hardware statistics goes out again.
(2) calculating of utilized bandwidth:
Calculate acquisition according to the service traffics that receive in the unit interval.
(3) test of network transfer delay:
According to the timestamp information that carries in the test packet, the time delay of computing network transmission.Can be divided into two kinds of situations of one way delay testing and round-trip delay test.
When carrying out the one way delay testing, tested point device and test end device, carried out the synchronous of network time by NTP (Network Time Protocol).Each equipment will be configured in separately the time register time then, increase progressively timing automatically by hardware.Test starting point equipment is stamped local timestamp mark in test data frame when sending test service stream, this packet that has the timestamp mark is by in the process of network, and the information of timestamp can not change.After having arrived the test end device, the test end device extracts timestamp from test service stream, and compares with current time of locality, just can obtain the time interval between the two, also is the network transfer delay of this packet.
If carry out the test of one way propagation delay time, carry out between two strange land distinct devices owing to send and receive, and there is the regular hour error in NTP (Network Time Protocol) itself, the clock of two strange land equipment is not a precise synchronization, when therefore adopting the one way transmission to carry out delay testing, can there be the regular hour error in test result.
In order to obtain network transfer delay more accurately, can carry out the round-trip delay test.After test packet received in the test end device, do not change and tested the timestamp information sign that point device is stamped, test packet is pressed former road loopback.After having tested point device and having received the test packet that has the timestamp sign that self sends from backhaul, extract this timestamp, and the current time information when receiving this test packet, obtain round trip transmission delay accurately.
Because the reference time of the equipment that the transmission of test service stream and reception all are to use when carrying out the round-trip delay test is so can obtain test value accurately.
(4) return operational trials:
Configuration according to the access control list of test terminal point is correspondingly processed to the test packet of receiving, then it is looped back to the test starting point, can carry out the test of asymmetrical paths, non-symmetrical service stream flow etc.
The present invention is for different operational trialss, and the test service identical with this Business Stream by simulation flows, thus realized to any business, based on the end-to-end test of real network, for the QoS of network provides better monitoring means.
Encapsulation format with Layer 2 Tunneling Protocol L2TP is an example below, and the test service stream that generates among the present invention is described.
The present technique field personnel know, the encapsulation format of L2TP has two kinds, and a kind of is to be encapsulated in the IP packet, and another kind is in UDP (User Datagram Protoco (UDP)) packet that is encapsulated in behind the IP.Being encapsulated in the IP data with L2TP below is that example describes.
The encapsulation format of L2TP is as shown in table 1 below, is that an ethernet data frame is encapsulated in a form in the IP tunnel, comprises two-layer MAC head and two-layer IP head.
Table 1:
Because the CRC (cyclic redundancy check (CRC)) of Ethernet Over PPP (carrying point-to-point protocol) is optional in the standard, be verified as 4 parts at last in the above table, be respectively MAC head and the MAC head of IP head and customer service and the verification of IP head at encapsulation tunnel.The form of L2TP encapsulation header is 92 bytes.
For example, user A and user B are in the VPN (Virtual Private Network) of same L2TP, and both carry out business intercommunication in the VPN by network, its networking structure as shown in Figure 5:
User A is by the gateway A access network, and user B is by gateway B access network.
When user A sent business to user B, the MAC Address of user A and IP address were as the source MAC and the source IP address of nexine MAC head and IP head, and the MAC Address of user B and IP address are as the target MAC (Media Access Control) address and the IP address of nexine MAC head and IP head.
Outer field MAC Address and IP address, be to determine by the gateway A of outer layer tunnel and the address of gateway B, send when professional to user B at user A, the MAC Address of gateway A and IP address are as the source MAC and the source IP address of skin encapsulation, and the MAC Address of gateway B and IP address are as the target MAC (Media Access Control) address and the purpose IP address of skin encapsulation.
Before testing, gateway A should be carried out the negotiation of test order with gateway B, perhaps by webmaster or manually be configured and carry out testing setup.For example can select for use the reserved field of 16 bits of L2PT head to represent, as select numerical value 20 for use for the test sign; Through consultation or configuration end device ACL, select to carry out loopback.
When carrying out conventionally test, end device is according to the action of the ACL that configures, 92 bytes in front, packet header in the test service stream are all replaced to content in the register, and revise or keep original time stamp content, be looped back to up processing from the outbound port of the test terminal point network equipment, thereby allow this test service stream automatically return to the test starting point.
When carrying out the non-symmetrical service flow rate test,, 92 bytes in front, packet header in the test service stream are all replaced to content in the register, and revise or keep original time stamp content according to the action of ACL (access control list).And can change the length of test packet or change the number that sends packet according to configuration simultaneously.And then be looped back to up processing, thereby allow this test service stream automatically return to the test starting point from the outbound port of the test terminal point network equipment.
Suppose that present user A finds that itself and user B can not carry out normal professional the connection; It complains operator with this situation; If operator utilizes conventional method to be initiated to the connection test of gateway B from gateway A, it is any unusual that the result does not find that self network has, and can't solve customer complaint.Causing such problem reason is to stand in the network itself that not carrying is used in the test of operator just probably; And client's problem is that to have carried the network malunion of concrete application normal.For example certain network equipment between gateway A and the gateway B has been blocked the private IP address of user A, and this can't find in traditional test.
As long as test and to find the problem device place fast and utilize above-mentioned concrete method of testing of the present invention to simulate the test service stream that is packaged with user data package.
Further say, suppose that the ftp business between user A and the user B is obstructed, and other professional forwardings normally.Need carry out testing setup again this moment, plays point device then according to analog configuration, generates the test service stream based on File Transfer Protocol, is based on the characterization test Business Stream that FTP uses.Next, operator can select to begin to test one by one from gateway A, also can adopt dichotomy more efficiently, promptly suppose to exist between the gateway A B 4N equipment, test between advanced beginning-of-line equipment and the 2N equipment is passed through if test, then with the 3N testing equipment, if do not pass through, then with the N testing equipment ... .. tests so repeatedly up to the network equipment that finds the blocking-up ftp business.In general, this moment, the keeper of operator watched the configuration of this equipment, as acl rule, searched out ftp business and was blocked reason, the improper ftp business that causes of acl rule configuration of supposing this network equipment is blocked, as long as the keeper makes the ftp business that corresponding modification can be recovered the user.Suppose that user's ftp business is not blocked, just transmission rate is quite slow, after can revising testing setup equally, adopt said method to find and cause transmission rate bottleneck equipment slowly, corresponding modify network equipments configuration or by exchange device software and hardware is more recovered the normal transmission rate of user.
With reference to Fig. 6, Fig. 6 shows the networking block diagram of system of the present invention:
This system comprises: test and management equipment 600, tested point device 601 and test end device 602, these equipment link to each other by network link, such as, coaxial cord, optical cable etc.
The different apparatus for network node of interconnected needs of heterogeneous networks realizes that business datum may just need the forwarding of a plurality of node devices from the source node to the destination node.According to the difference of network topology structure, testing point device 601 and test has one or more apparatus for network node (not shown)s between the end device 602, such as, repeater, bridge, router, gateway, the network switch etc.
Test and management equipment 600 is finished the test starting point network equipment and the parameter configuration of the test terminal point network equipment and the management of test process.
Carrying out network service quality when test, at first the physical channel of test and management passage or the webmaster of testing setup information by special use being used by test and management equipment sends to and test point device and tested end device.Such as, being used to generate the analog configuration that test service flows, the ratio with general traffics is flowed in test, needs the test data stream of insertion, performance and statistical information, test sign or timestamp or the packet ID that need detect.The testing setup of end device comprises asymmetrical loopback setting, i.e. the packet of the test service stream of terminal test processing unit transmission is different from the test service stream that receives on speed or size.
At the outbound port place that has tested point device, insert test service stream according to the parameter information of configuration, these test service streams are based on application, that is to say that the packet of test service stream is the content of carrying more than three layers.Then test service stream is mail to the test end device with Business Stream.These test service streams are the same with Business Stream, after having tested the apparatus for network node forwarding between point device and the test end device, arrive the test end device.
After these data received in the test end device, the test service that extracts wherein according to the parameter information that disposes flowed, and detected the service quality of network according to the test service stream that extracts.Usually, can before test, outbound port ACL be sent to the test terminal point network equipment by test and management equipment 600, the test end device identifies the feature of test service stream and makes corresponding test processes according to this outbound port ACL, such as, carry out operations such as error statistics, packet loss statistics according to transmit leg and recipient's address information, the test service stream id information etc. of configuration.
Owing to testing point device and testing the processing that end device all needs some softwares or hardware, therefore, in general tested point device and the test end device all needs to have CPU (CPU) and memory function, such as, have the network switch or other network equipments of CPU.Simultaneously starting point or end device need possess network management interface, are used to accept the testing setup that test and management equipment or other network management devices issue.
As shown in Figure 6, having tested point device comprises: testing setup memory cell 611, test stream insert unit 612, starting point Business Stream extraction unit 613.
After having tested point device 601 and receiving the testing setup that test and management equipment 600 sends, be stored in the testing setup memory cell 611, when needing to insert, insert unit 612 at its outbound port place by test stream and read these data, and it is inserted in the normal Business Stream by a certain percentage.In the Business Stream insertion process, can be inserted into the speed in the general traffics according to the flow size adjustment test service stream of test service stream, also can end to insert test service stream after the general traffics.
The test end device comprises: testing setup memory cell 621, test service stream extraction unit 622 and terminal test processing unit 623.
After test end device 602 receives the testing setup of test and management equipment 600 transmissions, be stored in the testing setup memory cell 621, after receiving that apparatus for network node is transmitted next Business Stream, terminal test stream extraction unit 622 extracts corresponding test service stream according to the testing setup of storage from these Business Streams.Loop back processing being is directly analyzed or changed in test processes unit 623 according to test stream characteristic information to the test service stream that extracts.
If need do loop back processing being to test service stream, then can will comprise loopback by test and management equipment 600 sets the testing setup of (available ACL realizes) and is handed down to test end device 602 by outbound port, after test end device 602 extracts corresponding test service stream, action according to ACL, make corresponding processing data packets, as indicating according to action, replace some bytes in the packet header, and stamp corresponding time stamp content, be looped back to test point device 601 from the outbound port of testing end device 602; If perhaps testing setup comprises asymmetric flow rate test setting, then can revise the speed or the size of return data bag, make the test service stream that returns be different from original test service stream, simulate asymmetric flow ratio and set.
Test that point device 601 receives that apparatus for network node transmits return test service and flow after, extracting the corresponding test service that returns by starting point test stream extraction unit 613 from these Business Streams flows, it is done performance evaluation, thereby can learn the operation conditions of back haul link.
The testing setup memory cell 611 that comprises in above-mentioned point device and the end device, test stream insert unit 612, starting point Business Stream extraction unit 613, starting point test processes unit 614, testing setup memory cell 621, test service stream extraction unit 622 and terminal test processing unit 623, these unit all are based on logical partitioning, it is variable on the way of realization of software and hardware, those skilled in the art can have different software and hardware implementations by above-mentioned introduction, but these modes all belong to the variation that does not break away from spirit of the present invention.Particularly mention the static configuration of testing setup in the preamble, this moment is except the address information of test end device and the type of service of this test, other can be stored in the analog configuration of various application itself, loopback setting, insertion rate setting etc. in the testing setup memory cell by the mode of configured in advance fully, and can carry out of the setting of many group testing setups to realize that a plurality of tests are any, measure the trial affair as setting one way test assignment, loopback test task and asymmetric drift.
System of the present invention can be applied in the multiple network, such as, Ethernet, RPR (Resilient Packet Ring) net etc.And the aforementioned identification technology not only is confined to the utilization of acl rule, can also adopt other technologies, realizes as the NBAR of Cisco System Co. (based on using identification) technology; Analog configuration not only can realize by hardware, also can realize by software.
The principle that the present invention has tested point device and test end device can play point device 601 and test end device 602 with reference to the test among Fig. 6, does not repeat them here.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (15)
1, a kind of network performance test method is characterized in that, described method comprises step:
A, to tested point device and the test end device carry out testing setup;
B, test the point device place, carrying the test service stream of concrete service application according to testing setup simulation one;
C, described test service stream is mail to the test end device from the test point device of described network;
D, obtain test service stream, use for analyzing at described test end device; Perhaps the test service stream that obtains is looped back to described test and plays point device, carry out the return operational trials.
2, network performance test method according to claim 1 is characterized in that, described step B is specially:
By predetermined ratio described test service stream is inserted in the general traffics, perhaps
End to insert described test service stream after the general traffics.
3, network performance test method according to claim 1, it is characterized in that, described testing setup comprises: set the analog configuration that is used to generate test service stream, and set in the following information at least one: test sign, timestamp, package identification.
4, network performance test method according to claim 3 is characterized in that, described testing setup comprises to be set the identification setting of test end device and loopback.
5, network performance test method according to claim 4 is characterized in that, described loopback is set at asymmetrical loopback and sets, and comprises the packet in the test service stream is returned speed or the setting of packet size.
6, a kind of network performance testing system, comprise: the test that links to each other by network plays point device and test end device, described test plays the testing setup insertion test service stream of point device according to the test and management equipment disposition, and described test service stream is mail to described test end device; Described test end device extracts described test service stream according to the testing setup of configuration, and according to the service quality of the test service stream that extracts for the described network of analysis; It is characterized in that,
Described test plays point device and comprises:
The testing setup memory cell is used to store the testing setup that described test and management equipment sends;
Test stream insertion unit is coupled in described testing setup memory cell, is used for generating test service stream according to the testing setup simulation of storage, and is inserted in the general traffics of having tested the point device transmission;
Starting point test stream extraction unit is used for extracting the test service stream that returns from the test end device from the general traffics that described test point device receives;
Described test end device comprises:
The testing setup memory cell is used to store the testing setup that described test and management equipment sends;
Terminal test stream extraction unit is used for extracting corresponding test service stream according to the Business Stream that described testing setup receives from described test end device;
The terminal test processing unit is coupled in described testing setup memory cell and described terminal test stream extraction unit respectively, is used for according to testing setup test service being flowed loopback to having tested point device.
7, network performance testing system according to claim 6 is characterized in that, described test plays point device and described test end device is respectively the network equipment with CPU and memory function.
8, network performance testing system according to claim 6 is characterized in that, the testing setup of described test end device is comprised that asymmetrical loopback sets.
9, a kind of network performance testing system comprises network management device, has tested point device and test end device, it is characterized in that:
Described network management device is used for that test to appointment plays point device and the test end device issues testing setup;
Described test plays point device and generates test service stream according to above-mentioned testing setup;
Described test end device test the test service stream that point device is sent according to testing setup identification, and generation is returned test service and flowed to described test starting point device orientation transmission according to testing setup.
10, network performance testing system according to claim 9, it is characterized in that, the testing setup of test end device comprises the testing setup of asymmetric flow, and the test end device is according to the packet rate of returning test service stream of above-mentioned setting generation or the test service stream that varies in size and send in the test point device.
11, a kind of test plays point device, has network management interface, is used for the testing setup that the acceptance test management equipment sends, and it is characterized in that, this test plays point device and also comprises:
The testing setup memory cell is used to store the testing setup that receives from test and management equipment;
Test stream inserts the unit, and the test service that simulates based on concrete application according to described testing setup flows, and this test service is flowed to the test terminal point network equipment transmission of testing setup appointment.
12, test according to claim 11 plays point device, it is characterized in that, described test plays point device and also comprises:
Starting point test stream extraction unit is used to discern the test service stream that returns from the reception of the test terminal point network equipment, and the test service stream that this returns is extracted, and uses for administrative analysis.
13, test according to claim 11 plays point device, it is characterized in that, described testing setup comprises: set the analog configuration that is used to generate test service stream, set the ratio of test service stream and general traffics, and set in the following information at least one: test sign, timestamp, package identification.
14, a kind of test end device has network management interface, is used for the testing setup that the acceptance test management equipment sends, and it is characterized in that this test end device also comprises:
The testing setup memory cell is used to store the testing setup that receives from test and management equipment;
Terminal test stream extraction unit is used for extracting corresponding test service stream according to the Business Stream that described testing setup receives from the described test terminal point network equipment.
15, test end device according to claim 14 is characterized in that, described test end device also comprises:
The terminal test processing unit is used for according to testing setup test service being flowed loopback and gives the test starting point network equipment.
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| PCT/CN2006/000175 WO2006105707A1 (en) | 2005-04-04 | 2006-01-26 | A network performance testing method and the system, the device thereof |
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