CN105827476A - High-speed PING implementation method and PING testing method - Google Patents
High-speed PING implementation method and PING testing method Download PDFInfo
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- CN105827476A CN105827476A CN201610037222.XA CN201610037222A CN105827476A CN 105827476 A CN105827476 A CN 105827476A CN 201610037222 A CN201610037222 A CN 201610037222A CN 105827476 A CN105827476 A CN 105827476A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
Abstract
The invention discloses a high-speed PING implementation method realized based on a field-programmable gate array (FPGA). The method comprises a request message generation module connected with an instruction parsing module and used for reading parameters transmitted by the instruction parsing module so as to assemble a PING request message; a message receiving module used for receiving a PING message from an Ethernet line, parsing the received PING message and transmitting the parameters of the parsed PING message to a reception statistics module and a response processing module; the reception statistics module used for evaluating the network performance based on the received parameters of the parsed PING message; the response processing module used for judging whether the currently received PING request message needs to be responded to or not, generating a PING response message on the condition that the currently received PING request message needs to be responded, and sending the PING response message to a message switching module; and the message switching module used for sending the PING response message to the Ethernet line.
Description
Technical field
The invention belongs to a kind of based on high speed PING implementation method and Ping Test method, relate to Internet technical field.
Background technology
Network performance index mainly includes bandwidth, packet loss, three aspects of time delay, and the method for existing testing characteristics of network mainly has two kinds: one is to utilize download to test the speed software verification bandwidth；Another kind is performance test instrument or the equipment using specialty, tests according to the conformance testing specifications of standard.
Downloading the software that tests the speed can be by the file real-time testing line bandwidth in download server or the Internet, test the speed software it is generally required to be arranged on computer or server and could use, and test result is affected bigger by computer or server cpu performance, when downloading rate is bigger, CPU often cannot respond timely and preserve data, and therefore when line bandwidth is bigger, test result deviation is bigger.
General conformance testing specifications includes flow rate test, RFC2544 test and Y.1564 tests, and these are all international performance test standards.But these method of testing parameters are arranged and operating procedure is the most more complicated, it is desirable to user of service could use standard is very familiar, user is required higher, and test period is longer, inefficient.
Existing testing characteristics of network method includes that download is tested the speed software test and testing based on general international standard, the explanation test philosophy of two kinds of method of testings and test topology individually below.
1. downloaded software test mode
Downloaded software reaches the purpose tested the speed by the file in download server or the Internet, comprises FTP downloading mode and HTTP downloading mode, and conventional downloaded software includes a sudden peal of thunder, FlashGet etc..Its test topology figure refers to accompanying drawing 1.After installing downloaded software on computers, connecting FTP/HTTP server and download file, downloaded software shows that downloading rate reaches the purpose that tests the speed in real time.
2. universal standard test mode
Conventional performance test standard includes flow rate test, RFC2544 test and Y.1564 tests, and illustrates with RFC2544 test side length method here.RFC2544 agreement is the international standard for evaluating and testing network interconnection device that RFC tissue proposes, and is progressively used for measurement circuit performance by operator and each manufacturer later.He required a series of frame length (64,128,256,512,768,1024,1280,1518 byte) within the regular hour, tested by certain number.Its main test item has handling capacity (Throughput) to test, and time delay (Latency) is tested, LOF (FrameLossRate) test and back-to-back test (Back-to-backframes).
Handling capacity define: equipment under test in the case of not packet loss, the maximum data flow that can forward.The maximum number-of-packet passed through each second or byte number is generally used to weigh (MB/s).Its method of testing is: sends a number of frame with given pace in testing, and calculates the frame that Devices to test transmits, if the frame sent is equal with the number of frames of reception, then just transmission rate improved and retest；If receiving frame to be less than transmission frame, reducing transmission rate and retesting, until drawing final result.
Time delay defines: time delay refers to frame overall transmission time from source point to point of destination.This time includes process time and propagation time over a transmission medium of network node.The method measuring time delay is: sends a frame with timestamp, after network, recipient by the timestamp comparation entrained by time at that time and frame, thus draws delay value.In order to use same clock source, typically the frame sent is looped back to sender and compare, the most also referred to as round trip time delay.RFC2544 requires at least to need to be repeated 20 times to delay test, and result takes the meansigma methods of all test results.
LOF defines: successfully sends from sender, and does not arrive the number of the frame of recipient.Typically it is shown as frame loss rate, i.e. relative to total percentage ratio sending frame number.RFC2544 advises first from the beginning of maximum rate, gradually reduces transmission rate by certain step-length, until first time result when double no data is lost, wherein step-length maximum not can exceed that 10%.
Back-to-back definition: with the maximum speed that can be generated by, sending the packet of certain length, and constantly change the number of data packets once sent, until equipment under test can forward the packet of all transmissions completely, this bag number is exactly the back-to-back value of this equipment.It is mainly used in weighing the maximum storage transfer capability being devices under with storage transfer capability.Standard requiring, the transmission time can not be less than 2 seconds, it is proposed that at least repeating 50 times, result takes its meansigma methods.
RFC2544 code requirement each test item testing process is shown in accompanying drawing 2.First testing throughput item is carried out, delay testing item is started after all frame lengths have been tested, after all frame lengths complete delay testing, start frame loses test item, back to back test item is started after all frame lengths complete LOF test, after all frame lengths complete back to back test, whole RFC2544 completes test, now can get final the performance test results.
Its test topology typically uses the mode that remote loopback or far-end coordinate, and refers to accompanying drawing 3.According to RFC2544 testing process, RFC2544 tester sends test ethernet frame, loop back device is arrived after circuit to be measured, loop back device is by test frame loopback and again passes by circuit to be measured arrival RFC2544 tester, by RFC2544 tester statistics handling capacity, packet loss, time delay and back-to-back result.
, all there are some problems in whether downloaded software test mode or according to performance test standard testing mode, as follows:
1) downloaded software is necessarily mounted on computer just can be downloaded and tests the speed, and test result is affected bigger by computer performance.When downloading rate is bigger, CPU often cannot respond timely and preserve data, and therefore when line bandwidth is bigger, test result deviation is bigger；
2) download the software far-end that tests the speed must have download server with the use of, and circuit time delay value cannot be tested out；
3) RFC2544 testing standard is complicated, and test parameter is more, and testing procedure is complicated, needs user of service to use before and is familiar with RFC2544 standard, requires higher to user of service；
4) the RFC2544 testing standard testing time is longer, and performance test or line fault treatment effeciency are relatively low.
Summary of the invention
The technical problem to be solved is characteristic based on FPGA high speed processing, sends big flow PING request message real-time reception statistics PING response message by FPGA.Quickly testing link bandwidth, packet loss and time delay, parameter arranges simply, and the easy left-hand seat of user operates.
It is as follows that the present invention solves the technical scheme that above-mentioned technical problem taked:
High speed PING implementation method, realizes based on on-site programmable gate array FPGA, including: request message generation module, its link order parsing module, and read the parameter of command analysis module transmission, assemble PING request message accordingly；
Command analysis module, including: cpu instruction resolution unit, for cpu instruction is resolved to the discernible parameter of FPGA, it is delivered to FPGA other modules internal and uses；
FPGA instruction resolution unit, for FPGA inner parameter is converted to the instruction that CPU can identify, reads in real time for CPU；
Wherein, described cpu instruction is delivered to the parameter of FPGA, specifically includes: the parameter needed during for assembling PING request message, including the machine MAC Address, PING target MAC (Media Access Control) address, local IP address, the IP address of PING mesh, PING request message frame length；
The parameter needed for controlling PING request message to send, gives out a contract for a project start/stop control including PING speed, PING bag number, PING；
For judging that PING receives message whether timeout parameter, including the response timeout time；
Sending rate control module, it connects above command analysis module, and gives out a contract for a project number of parameters according to the PING speed of command analysis module output, PING, produces the encapsulation of PING request message and enables and also export PING request message generation module；
Send message handover module, connect described request message generation module, and the PING request message that request message generation module generates is sent to ethernet line；
Message receiver module, is used for receiving ethernet line PING message, and resolves receiving PING message, and pass to the PING message parameter parsed receive statistical module and response processing module；
Described reception statistical module, carries out network performance evaluation for the reception PING message parsed described in basis；
Described response processing module, is used for differentiating that currently received PING request message, the need of response, produces PING response message, and sends it to send message handover module when needs respond；
Described transmission message handover module, is sent to ethernet line by above PING response message.
After this invention takes above scheme, utilize conventional PING function, it is possible to verify network performance rapidly and quickly solve network failure, i.e. send big flow PING request message real-time reception statistics PING response message by FPGA.Quickly test link bandwidth, packet loss and time delay, parameter arranges simply, the easy left-hand seat of user operates, in addition, which solve download and test the speed software by cpu performance restricted problem, simultaneously because use conventional ping testing method, user can complete test without the testing standard of study specialty, reduces user of service's requirement.
This method is based on conventional PING function, and overcomes traditional PI NG and can only test the limitation of connectedness, provides the user and can quickly investigate network failure, the method and apparatus of quick testing characteristics of network.The method parameter is arranged simply, and user is easy to use, and quickly detection line connectivity accurately tests out line bandwidth, packet loss and time delay simultaneously.
Other features and advantages of the present invention will illustrate in the following description, and, partly become apparent from description, or understand by implementing the present invention.The purpose of the present invention and other advantages can be realized by structure specifically noted in the description write, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is described in detail, so that the above-mentioned advantage of the present invention is definitely.Wherein,
Fig. 1 is that the download of prior art is tested the speed software test topology schematic diagram；
Fig. 2 is the RFC2544 testing process schematic diagram of prior art；
Fig. 3 is the RFC2544 test topology schematic diagram of prior art；
The FPGA of Fig. 4 high speed PING of the present invention implementation method is internal realizes figure；
Fig. 5 is the embodiment schematic diagram that unitary device of the present invention coordinates that far end response equipment uses；
Fig. 6 is the embodiment schematic diagram that unitary device of the present invention coordinates that remote loopback equipment uses；
Fig. 7 be invention two table apparatus with the use of embodiment schematic diagram.
Detailed description of the invention
Describing embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the process that realizes reaching technique effect can fully understand and implement according to this.As long as it should be noted that do not constitute conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
RFC2544: the one group of test defined by RFC, RFC2544 performance test, the calibrating method of network interconnection device.
Y.1564:ITU a new testing standard of promotion, the method for testing that installation based on Ethernet, maintenance are generally acknowledged are organized.
PING: one communication protocol, is a part for ICP/IP protocol
MSTP:(Multi-ServiceTransferPlatform) (multi-service transport platform based on SDH) refers to realize the access of the business such as TDM, ATM, Ethernet based on SDH platform simultaneously, process and transmit, it is provided that the multi-service node of united net management.
IP:(InternetProtocol) agreement of interconnection between network
E1: use synchronous time division multiplexing technology that 30 voice channels (64KB) and 2 are controlled channel (16kb) and be compounded on the IA High Speed Channel of a 2.048Mbit/s
Wherein, specifically, as shown in Figure 4, high speed PING implementation method, realizes based on on-site programmable gate array FPGA, including: request message generation module, its link order parsing module, and read the parameter of command analysis module transmission, assemble PING request message accordingly；
Command analysis module, including: cpu instruction resolution unit, for cpu instruction is resolved to the discernible parameter of FPGA, it is delivered to FPGA other modules internal and uses；
FPGA instruction resolution unit, for FPGA inner parameter is converted to the instruction that CPU can identify, reads in real time for CPU；
Wherein, described cpu instruction is delivered to the parameter of FPGA, specifically includes: the parameter needed during for assembling PING request message, including the machine MAC Address, PING target MAC (Media Access Control) address, local IP address, the IP address of PING mesh, PING request message frame length；
The parameter needed for controlling PING request message to send, gives out a contract for a project start/stop control including PING speed, PING bag number, PING；
For judging that PING receives message whether timeout parameter, including the response timeout time；
Sending rate control module, it connects above command analysis module, and gives out a contract for a project number of parameters according to the PING speed of command analysis module output, PING, produces the encapsulation of PING request message and enables and also export PING request message generation module；
Send message handover module, connect described request message generation module, and the PING request message that request message generation module generates is sent to ethernet line；
Message receiver module, is used for receiving ethernet line PING message, and resolves receiving PING message, and pass to the PING message parameter parsed receive statistical module and response processing module；
Described reception statistical module, carries out network performance evaluation for the reception PING message parsed described in basis；
Described response processing module, is used for differentiating that currently received PING request message, the need of response, produces PING response message, and sends it to send message handover module when needs respond；
Described transmission message handover module, is sent to ethernet line by above PING response message.
Wherein, specifically, described FPGA inner parameter includes:
The parameter that CPU needs in time calculating PING result, including: PING request message give out a contract for a project number, PING receives correct message number, PING receives timeout packet number, PING receives error message bag number, PING loses message number, PING receives message maximum response time, PING receives message Best-case Response Time, PING receives message average response time；
It addition, described request message generation module, farther include:
Send message encapsulation unit, be used for the parameter according to command analysis module output, including: MAC Address, frame length, IP address, the PING request message encapsulation produced in conjunction with sending rate control module enables assembling PING request message；
Inserting distinctive serial number and time tag for each PING request message, when adding up for PING, packet loss detection and time-out judge；
Send message checking unit, for for each PING request message calculate IP verification and and ICMP verification and；For each PING request message calculate CRC32 verification and；
Message transfer unit, for exporting packaged message and being delivered to described transmission message handover module.
Additionally, in described message receiver module, specifically include:
Receive packet parsing unit, for reception PING message is resolved, parse the parameter that subordinate's module needs to use, including source MAC, target MAC (Media Access Control) address, source IP address, purpose IP address, PING message classification, serial number, time tag；
Receiving message checking unit, be used for docking receiving literary composition and carry out verifying and calculating and verify, checking prediction message IP verifies and verifies and the most correct with ICMP；
Docking receiving literary composition carries out CRC32 verification.
Additionally, described reception statistical module, specifically include:
Classified statistic unit, for the parameter resolved according to message receiver module, carrying out classified statistic to receiving PING message, statistical content includes: is properly received bag number, receives erroneous packets number, lost package number, time-out bag number, maximum response time, Best-case Response Time, average response time；
Message matching unit, currently receives PING message as routine PING response message or loopback PING message for Auto-matching and judging；
Wherein, conventional PING response message matching condition: the current PING type of message that receives is PING response message, and this packet parsing to go out target MAC (Media Access Control) address consistent with the machine MAC Address, purpose IP address is consistent with local IP address；
Loopback PING message matching condition: the current PING type of message that receives is PING request message, and the source and destination MAC Address that this packet parsing goes out is all consistent with the machine MAC Address, and source and destination IP address is all consistent with local IP address；
Response time computing unit, calculates for time tag and the current local time enumerator carried according to reception PING message, draws this message response time.
Additionally, described request message generation module, when sending each PING request message, all Local time counter can be inserted message as time tag；
Described response time computing unit, calculates for time tag and the current local time enumerator carried according to reception PING message, draws this message response time, specifically include:
Local system clock is 41.667Mhz, and each cycle time is 24ns, and this clock produces a 32bit time counter, it is assumed that for T1, the time tag that message carries is T2, and response time TD specific formula for calculation is as follows:
T1 ＞ T2, represents that Local time counter does not overflows, computing formula:
TD=(T1-T2) * 24, unit ns；
T1 ＜ T2, represents that Local time counter overflows, computing formula:
TD=(2^32+T1-T2) * 24, unit ns.
Additionally, also include: be properly received bag number statistic unit, being used for adding up the correct bag number of reception, statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message；
2) the PING response timeout time that message response time is arranged less than or equal to CPU；
3) CRC32 verification is correct；
4) statistics when IP verifies and verifies with ICMP and verify correct；
Receiving erroneous packets number statistic unit, for adding up the bag number receiving mistake, statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message；
2) the PING response timeout time that message response time is arranged less than or equal to CPU；
3) this message comprises following any one or more mistake: add up when CRC32 check errors, IP checksum error or ICMP checksum error；
Time-out bag number statistic unit, receives correctly but the bag number of time-out for adding up, and statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message；
2) the PING response timeout time that message response time is arranged more than CPU；
3) CRC32 verification is correct；
4) statistics when IP verifies and verifies with ICMP and verify correct；
Number of dropped packets statistic unit, for adding up lost package number；
Wherein, described request message generation module inserts a serial number when sending each PING request message, and this serial number is locally generated by FPGA, uses a 32bit enumerator, often send a PING request message serial number and automatically add 1, the most adjacent two PING sequence of message number difference 1；
S1 represents and is properly received PING message maximum sequence number so far, and S2 represents current and receives PING sequence of message number, and number of dropped packets LOSS computing formula is as follows:
S2=S1, indicates without packet loss, LOSS=LOSS, S1=S2+1；
S2 ＞ S1, S1 does not overflows, and indicates packet loss, LOSS=LOSS+S2-S1, S1=S2+1；
When S2 ＞ S1, S1 overflow, indicating without packet loss, this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS, LOSS=LOSS-1, S1=S1；
S2 ＜ S1, S2 overflow, and when S1 does not overflows, indicate packet loss, LOSS=LOSS+2^32+S2-S1, S1=S2+1；
S2 ＜ S1, S2 does not overflows, and indicates without packet loss, and this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS, LOSS=LOSS-1, S1=S1.
Additionally, described response time computing unit, farther include:
Maximum response time computation subunit, is used for carrying out maximum response time calculating, including:
Assuming that maximum response time is defined as TDMAX, current message response time is TD, and maximum response time computational methods are as follows:
During initialization, TDMAX is initialized as zero；
Comparing receiving each message TD with TDMAX, as TD ＞ TDMAX: TDMAX=TD, the TDMAX that test terminates to finally give is then for maximum response time；
Best-case Response Time computation subunit, is used for carrying out minimum time calculating, including:
Assuming that maximum response time is defined as TDMIN, current message response time is TD, and Best-case Response Time computational methods are as follows:
During initialization, TDMIN is initialized as maximum；
Comparing receiving each message TD with TDMIN, as TD ＜ TDMIN: TDMIN=TD, the TDMIN that test terminates to finally give is then for Best-case Response Time.
Average response time: assuming that definition average response time is TDAVG, all to be properly received message response time cumulative and for TDSUM, and all message numbers that are properly received are PKTOK, and current message response time is TD, and average response time computational methods are as follows:
During initialization, TDSUM is initialized as zero；
TDSUM=TDSUM+TD when receiving each message；
Average response time calculates: TDAVG=TDSUM/PKTOK.
Additionally, described response processing module, it is used for differentiating that currently received PING request message, the need of response, and produces PING response message, receives PING message response condition and specifically include:
1) receiving message is PING request message；
2) receiving PING request message target MAC (Media Access Control) address consistent with the machine MAC Address, purpose IP address is consistent with local IP address；
3) receiving PING request message source MAC inconsistent with the machine MAC Address, source IP address is inconsistent with local IP address；
4) receiving PING request message CRC32 verification correct, IP verifies and correct with ICMP verification and verification；
If currently receiving message to meet conditions above, then this reception message is determined as needing response, and described respond module regenerates PING response message, and concrete grammar is as follows:
1) exchange PING request message source and destination MAC Address, exchanges source and destination IP address；
2) type of message is revised as PING response message；
3) recalculate ICMP verification and；
4) recalculate CRC32 verification and.
Additionally, described transmission message handover module, being further used for receiving request message generation module and the two-way PING to be sent message of response processing module transmission, take to arrive first and first go out principle, order sends two-way message to line side.
Method of testing and flow process to apparatus above are described in detail the most in conjunction with the embodiments, and specifically, this device provides two kinds of high speed ping testing methods, including:
Conventional PING mode and loopback PING mode.Can be applicable to dissimilar circuit, meet major part line connectivity and performance test demand.
1) conventional PING, is applicable to IP circuit, MSTP circuit, E1 circuit, and far-end needs equipment to respond PING request message, such as computer, router, high speed ping testing device etc., and concrete method of testing and process are as follows:
A) this end device assembles and sends high speed PING request message, message source MAC Address and source IP address is the machine address, and target MAC (Media Access Control) address and purpose IP address are far end response device address；
B) far end response equipment receives PING request message and responds, and replys PING response message；
C) this end device receives PING response message and adds up, and automatically calculates line bandwidth, packet loss and time delay etc..
2) loopback PING, is applicable to MSTP circuit, E1 circuit, and far-end, without equipment response PING request, can be accessed by loop back device or utilizes cable physical self ring, and concrete method of testing and process are as follows:
A) this end device assembles and sends high speed PING request message, and message source MAC Address, source IP address, target MAC (Media Access Control) address, purpose IP address are the machine address；
B) remote loopback equipment or physical circuit are after ring, make no modifications and loopback receiving message；
C) this end device receives PING request message and adds up, and automatically calculates line bandwidth, packet loss and time delay etc..
Wherein, the present invention is different from traditional ping testing, and high speed PING needs to test out the results such as the bandwidth of circuit, time delay, packet loss while continuity testing.Therefore it is required that PING request message the PING response message of the real-time big flow of analytic statistics of big flow can be sent.Characteristic based on FPGA high speed processing in this method, PING request message assembles transmission, PING response message receives and resolves to utilize FPGA to realize, and supports to respond big flow PING request message, provides loopback ping testing scheme simultaneously.
Wherein, specifically: PING request message produces and sends:
1) command analysis module has two functions, and one is that cpu instruction resolves to the discernible parameter of FPGA, for other modules of FPGA inside；Another is that FPGA inner parameter is converted to the instruction that CPU can identify, reads in real time for CPU；
The parameter being delivered to FPGA includes:
A) parameter needed time for assembling PING request message, including the machine MAC Address, PING target MAC (Media Access Control) address, local IP address, the IP address of PING mesh, PING request message frame length etc.；
B) parameter needed for controlling PING request message to send, gives out a contract for a project start/stop control etc. including PING speed, PING bag number, PING；
C) PING is set and receives the statistics response timeout time；
The parameter being delivered to CPU includes:
A) parameter needed when CPU calculates PING result, including PING request message give out a contract for a project number, PING receives correct message number, PING receives timeout packet number, PING receives error message bag number, PING loses message number, PING receives message maximum response time, PING receives message Best-case Response Time, PING receives message average response time etc.；
B) current FPGA instruction parameter；
2) PING sending rate control module exports according to command analysis module PING speed, PING give out a contract for a project the parameters such as number, generation PING request message encapsulation enables and exports PING request message generation module, reaches PING sending rate control and the purpose of PING appointment message number；
3) PING request message generation module is for the encapsulation of PING request message and transmission, mainly has a following function:
A) according to the parameter (such as MAC Address, frame length, IP address etc.) of command analysis module output, the PING request message encapsulation produced in combination with PING sending rate control module enables assembling PING request message；
B) being that each PING request message inserts distinctive serial number and time tag, when adding up for PING, packet loss detection and time-out judge；
C) be each PING request message calculate IP verification and and ICMP verification and；
D) be each PING request message calculate CRC32 verification and；
E) packaged message exported and be delivered to subordinate's module.
4) PING message receiver module is for resolving, including PING request message and PING response message reception PING message.Mainly comprise following function:
A) docking receiving literary composition resolves, and parses the parameter that subordinate's module needs to use.Including source MAC, target MAC (Media Access Control) address, source IP address, purpose IP address, PING message classification, serial number, time tag etc.；
B) docking receiving literary composition carries out verifying and calculating and verify, and checking prediction message IP verifies and verifies and the most correct with ICMP；
C) docking receiving literary composition carries out CRC32 verification；
5) PING reception statistical module is for adding up reception PING message, and major function is as follows:
A) parameter parsed according to PING message receiver module, carries out classified statistic to receiving PING message.Statistical content includes: is properly received bag number, receives erroneous packets number, lost package number, time-out bag number, maximum response time, Best-case Response Time, average response time；
B) supporting that conventional PING statistics and loopback PING add up, Auto-matching currently receives PING message for conventional PING response message or loopback PING message.Matching condition is as follows:
As conventional PING: receiving type of message is PING response message, and this packet parsing to go out target MAC (Media Access Control) address consistent with the machine MAC Address, purpose IP address is consistent with local IP address；
As loopback PING: receiving type of message is PING request message, and the source and destination MAC Address that this packet parsing goes out is all consistent with the machine MAC Address, and source and destination IP address is all consistent with local IP address；
C) response time calculates: utilize the characteristic that message content will not be made an amendment by the equipment end of PING mesh when responding PING request message, and Local time counter all can be inserted message as time tag when sending each PING request message by PING request message generation module.Time tag and current local time enumerator that PING reception statistical module carries according to reception PING message calculate, and draw this message response time.Local system clock is 41.667Mhz, and each cycle time is 24ns.And utilize this clock to produce a 32bit time counter, it is assumed that for T1, the time tag that message carries is T2, and response time TD specific formula for calculation is as follows:
As T1 ＞ T2, represent that Local time counter does not overflows, computing formula:
TD=(T1-T2) * 24, unit ns；
As T1 ＜ T2, represent that Local time counter overflows, computing formula:
TD=(2^32+T1-T2) * 24, unit ns.
D) bag number it is properly received:
When correct coupling current message is conventional PING message or loopback PING message；
When the PING response timeout time that message response time is arranged less than or equal to CPU；
When CRC32 verification is correct；
When IP verifies and correct with ICMP verification and verification；
E) receive erroneous packets number to add up:
When correct coupling current message is conventional PING message or loopback PING message；
When the PING response timeout time that message response time is arranged less than or equal to CPU；
When this message comprises following any one or more mistake: CRC32 check errors, IP checksum error or ICMP checksum error；
F) time-out bag number statistics:
When correct coupling current message is conventional PING message or loopback PING message；
When the PING response timeout time that message response time is arranged more than CPU；
When CRC32 verification is correct；
When IP verifies and correct with ICMP verification and verification；
G) number of dropped packets statistics: utilize the characteristic that message content will not be made an amendment by the equipment end of PING mesh when responding PING request message, PING request message generation module all can insert a serial number when sending each PING request message, this serial number is locally generated by FPGA, use a 32bit enumerator, often send a PING request message serial number and automatically add 1, the most adjacent two PING sequence of message number difference 1.Assuming S1 to represent so far and be properly received PING message maximum sequence number, S2 represents current and receives PING sequence of message number, and number of dropped packets LOSS computing formula is as follows:
Work as S2=S1, indicate without packet loss.LOSS=LOSS, S1=S2+1；
As S2 ＞ S1, S1 does not overflows, and indicates packet loss.LOSS=LOSS+S2-S1, S1=S2+1；
When S2 ＞ S1, S1 overflow, indicating without packet loss, this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS.LOSS=LOSS-1, S1=S1；
When S2 ＜ S1, S2 overflow, when S1 does not overflows, indicate packet loss.LOSS=LOSS+2^32+S2-S1, S1=S2+1；
As S2 ＜ S1, S2 does not overflows, and indicates without packet loss, and this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS.LOSS=LOSS-1, S1=S1.
H) maximum response time: assuming that maximum response time is defined as TDMAX, current message response time is TD, and maximum response time computational methods are as follows:
Upon initialization, TDMAX is initialized as zero；
When comparing each message TD with TDMAX of reception, as TD ＞ TDMAX: TDMAX=TD, the TDMAX that test terminates to finally give is then for maximum response time.
I) Best-case Response Time: assuming that maximum response time is defined as TDMIN, current message response time is TD, and Best-case Response Time computational methods are as follows:
Upon initialization, TDMIN is initialized as maximum；
When comparing each message TD with TDMIN of reception, as TD ＜ TDMIN: TDMIN=TD, the TDMIN that test terminates to finally give is then for Best-case Response Time.
J) average response time: assuming that definition average response time is TDAVG, it is all that to be properly received message response time cumulative and for TDSUM, all message numbers that are properly received are PKTOK, and current message response time is TD, and average response time computational methods are as follows:
Upon initialization, TDSUM is initialized as zero；
The TDSUM=TDSUM+TD when receiving each message；
When average response time calculates: TDAVG=TDSUM/PKTOK.
6) PING response processing module is used for differentiating that currently received PING request message, the need of response, and produces PING response message；
A) PING request message response condition is received:
It is PING request message when receiving message；
When receiving, PING request message target MAC (Media Access Control) address is consistent with the machine MAC Address, and purpose IP address is consistent with local IP address；
When receiving, PING request message source MAC is inconsistent with the machine MAC Address, and source IP address is inconsistent with local IP address；
When receiving, PING request message CRC32 verification is correct, and IP verifies and correct with ICMP verification and verification；
B) if one receives request message and is determined as needing response, this module also will regenerate PING response message, and concrete grammar is as follows:
When exchange PING request message source and destination MAC Address, exchange source and destination IP address；
When type of message being revised as PING response message；
When recalculate ICMP verification and；
When recalculate CRC32 verification and.
7) sending message handover module and receive two-way PING to be sent message, respectively from PING request message generation module and PING response processing module, take to arrive first and first go out principle, order sends two-way message to line side.
3. interface is arranged and display element
The mode that this device uses software and hardware to combine realizes high speed PING, software provide the various parameters of high speed ping testing needs, reads the statistical result of high speed PING simultaneously and also feeds back to user.Software provides graphic interface intuitively, is available for user and quickly revises PING parameter and inquire about test result.
1) setting option providing user is less, and PING command type on computer, and user can Fast Learning using.Interface provides setting option as follows:
A) local IP address；
B) the machine MAC Address；
C) the IP address of PING mesh；
D) PING message frame length；
E) PING message number；
F) PING speed.
2) statistical result of interface display is as follows:
A) PING gives out a contract for a project number；
B) PING correct packet receiving number；
C) PING receives time-out bag number；
D) PING receives erroneous packets number；
E) PING lost package number；
F) PING packet loss, packet loss=lost package number/number of giving out a contract for a project；
G) maximum response time；
H) Best-case Response Time；
I) average response time；
J) PING transmission rate and PING receiving velocity.
The device is mainly used for quick test network connectedness and performance, it is provided that multiple occupation mode.
1) matching computer, router or server etc. can respond the equipment use of PING request command.Wherein, as it is shown in figure 5, use conventional ping testing method, mainly use when far-end does not has cooperating equipment or on-line testing link performance.This method of testing environmental structure is simple, accesses high speed ping testing device PING far-end computer, router or server ip address etc. at local terminal and can complete test.It is applicable to the various lines such as IP circuit, MSTP circuit, E1 special line, simultaneously can on-line testing link performance, but affected relatively big by far end response equipment response performance, when line bandwidth is higher, test result there may be deviation, such as when line bandwidth is higher than 100Mbps.
2) coordinating loop back device to use, operation instruction as shown in Figure 6, uses loopback ping testing method, is mainly used in testing physics line channel, requires relatively low to far-end cooperation, it is only necessary to provide cable from ring or to access loop back device.Test result is not affected by line side equipment response performance, can support that linear speed is tested.But this method of testing is mainly used in physical circuit lane testing, such as MSTP special line, E1 special line are tested.
3) two table apparatus are with the use of, operation instruction figure as it is shown in fig. 7, use conventional ping testing method, are mainly used in the circuit that bandwidth is higher, it is adaptable to the circuits such as IP special line, MSTP special line, E1 special line.Need two high speed ping testing devices with the use of, by high speed ping testing device send PING ask and respond PING request command, can reach linear speed test.
The present invention has a techniques below advantage:
The most simple to operate: the method parameter arranges simply, similar with tradition computer PING order, user simply learns to use；
2. test is efficiently: utilize high speed PING, accurately tests out line bandwidth, packet loss and time delay at quickly detection line connectivity simultaneously, saves the testing time；
3. measuring accuracy is high: use FPGA to control the transmission of PING flow and response time calculates.Flow accuracy reaches 0.001Mbps, and delay testing precision reaches 24ns.
It should be noted that, for said method embodiment, in order to be briefly described, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the application is not limited by described sequence of movement, because according to the application, some step can use other orders or carry out simultaneously.Secondly, those skilled in the art also should know, embodiment described in this description belongs to preferred embodiment, necessary to involved action and module not necessarily the application.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, although the present invention being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (12)
1. high speed PING implementation method, realizes based on on-site programmable gate array FPGA, including: request message generation module, its link order parsing module, and read the parameter of command analysis module transmission, assemble PING request message accordingly；
Command analysis module, including: cpu instruction resolution unit, for cpu instruction is resolved to the discernible parameter of FPGA, it is delivered to FPGA other modules internal and uses；
FPGA instruction resolution unit, for FPGA inner parameter is converted to the instruction that CPU can identify, reads in real time for CPU；
Wherein, described cpu instruction is delivered to the parameter of FPGA, specifically includes: the parameter needed during for assembling PING request message, including the machine MAC Address, PING target MAC (Media Access Control) address, local IP address, the IP address of PING mesh, PING request message frame length；
The parameter needed for controlling PING request message to send, gives out a contract for a project start/stop control including PING speed, PING bag number, PING；
For judging that PING receives message whether timeout parameter, including the response timeout time；
Sending rate control module, it connects above command analysis module, and gives out a contract for a project number of parameters according to the PING speed of command analysis module output, PING, produces the encapsulation of PING request message and enables and also export PING request message generation module；
Send message handover module, connect described request message generation module, and the PING request message that request message generation module generates is sent to ethernet line；
Message receiver module, is used for receiving ethernet line PING message, and resolves receiving PING message, and pass to the PING message parameter parsed receive statistical module and response processing module；
Described reception statistical module, carries out network performance evaluation for the reception PING message parameter parsed described in basis；
Described response processing module, is used for differentiating that currently received PING request message, the need of response, produces PING response message, and sends it to send message handover module when needs respond；
Described transmission message handover module, is sent to ethernet line by above PING response message.
High speed PING implementation method the most according to claim 1, it is characterised in that described FPGA inner parameter includes:
The parameter that CPU needs in time calculating PING result, including: PING request message give out a contract for a project number, PING receives correct message number, PING receives timeout packet number, PING receives error message bag number, PING loses message number, PING receives message maximum response time, PING receives message Best-case Response Time, PING receives message average response time.
High speed PING implementation method the most according to claim 1 and 2, it is characterised in that described request message generation module, farther includes:
Send message encapsulation unit, be used for the parameter according to command analysis module output, including: MAC Address, frame length, IP address, the PING request message encapsulation produced in conjunction with sending rate control module enables assembling PING request message；
Inserting distinctive serial number and time tag for each PING request message, when adding up for PING, packet loss detection and time-out judge；
Send message checking unit, for for each PING request message calculate IP verification and and ICMP verification and；For each PING request message calculate CRC32 verification and；
Message transfer unit, for exporting packaged message and being delivered to described transmission message handover module.
High speed PING implementation method the most according to claim 1, it is characterised in that in described message receiver module, specifically include；
Receive packet parsing unit, for reception PING message is resolved, parse the parameter that subordinate's module needs to use, including source MAC, target MAC (Media Access Control) address, source IP address, purpose IP address, PING message classification, serial number, time tag；
Receiving message checking unit, be used for docking receiving literary composition and carry out verifying and calculating and verify, checking prediction message IP verifies and verifies and the most correct with ICMP；
Docking receiving literary composition carries out CRC32 verification.
High speed PING implementation method the most according to claim 1, it is characterised in that described reception statistical module, specifically includes:
Classified statistic unit, for the parameter resolved according to message receiver module, carrying out classified statistic to receiving PING message, statistical content includes: is properly received bag number, receives erroneous packets number, lost package number, time-out bag number, maximum response time, Best-case Response Time, average response time；
Message matching unit, currently receives PING message as routine PING response message or loopback PING message for Auto-matching and judging；
Wherein, conventional PING response message matching condition: the current PING type of message that receives is PING response message, and this packet parsing to go out target MAC (Media Access Control) address consistent with the machine MAC Address, purpose IP address is consistent with local IP address；
Loopback PING message matching condition: the current PING type of message that receives is PING request message, and the source and destination MAC Address that this packet parsing goes out is all consistent with the machine MAC Address, and source and destination IP address is all consistent with local IP address；
Response time computing unit, calculates for time tag and the current local time enumerator carried according to reception PING message, draws this message response time.
High speed PING implementation method the most according to claim 5, it is characterised in that described request message generation module, all can insert message as time tag using Local time counter when sending each PING request message；
Described response time computing unit, calculates for time tag and the current local time enumerator carried according to reception PING message, draws this message response time, specifically include:
Local system clock is 41.667Mhz, and each cycle time is 24ns, and this clock produces a 32bitTime counter, it is assumed that for T1, the time tag that message carries is T2, and response time TD specific formula for calculation is as follows:
TI ＞ T2, represents that Local time counter does not overflows, computing formula:
TD=(T1-T2) * 24, unit ns；
TI ＜ T2, represents that Local time counter overflows, computing formula:
High speed PING implementation method the most according to claim 5, it is characterised in that also include: be properly received bag number statistic unit, is used for adding up the correct bag number of reception, and statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message:
2) the PING response timeout time that message response time is arranged less than or equal to CPU；
3) CRC32 verification is correct；
4) statistics when IP verifies and verifies with ICMP and verify correct；
Receiving erroneous packets number statistic unit, for adding up the bag number receiving mistake, statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message；
2) the PING response timeout time that message response time is arranged less than or equal to CPU；
3) this message comprises following any one or more mistake: add up when CRC32 check errors, IP checksum error or ICMP checksum error；
Time-out bag number statistic unit, receives correctly but the bag number of time-out for adding up, and statistical condition is as follows:
1) correct coupling current message is conventional PING message or loopback PING message；
2) the PING response timeout time that message response time is arranged more than CPU；
3) CRC32 verification is correct；
4) statistics when IP verifies and verifies with ICMP and verify correct；
Number of dropped packets statistic unit, for adding up lost package number；
Wherein, described request message generation module inserts a serial number when sending each PING request message, and this serial number is locally generated by FPGA, uses a 32bit enumerator, often send a PING request message serial number and automatically add 1, the most adjacent two PING sequence of message number difference 1；
S1 represents and is properly received PING message maximum sequence number so far, and S2 represents current and receives PING sequence of message number, and number of dropped packets LOSS computing formula is as follows:
S2=S1, indicates without packet loss, LOSS=LOSS, S1=S2+1；
S2 ＞ S1, S1 does not overflows, and indicates packet loss, LOSS=LOSS+S2-S1, S1=S2+1；
When S2 ＞ S1, S1 overflow, indicating without packet loss, this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS, LOSS=LOSS-1, S1=S1；
S2 ＜ S1, S2 overflow, and when S1 does not overflows, indicate packet loss,
S2 ＜ S1, S2 does not overflows, and indicates without packet loss, and this message is out of order message, needs to subtract 1 by this locality number of dropped packets LOSS, LOSS=LOSS-1, S1=S1.
High speed PING implementation method the most according to claim 5, it is characterised in that described response time computing unit, farther includes:
Maximum response time computation subunit, is used for carrying out maximum response time calculating, including:
Assuming that maximum response time is defined as TDMAX, current message response time is TD, and maximum response time computational methods are as follows:
During initialization, TDMAX is initialized as zero；
Comparing receiving each message TD with TDMAX, as TD ＞ TDMAX: TDMAX=TD, the TDMAX that test terminates to finally give is then for maximum response time；
Best-case Response Time computation subunit, is used for carrying out minimum time calculating, including:
Assuming that maximum response time is defined as TDMIN, current message response time is TD, and Best-case Response Time computational methods are as follows:
During initialization, TDMIN is initialized as maximum；
Comparing receiving each message TD with TDMIN, as TD ＜ TDMIN: TDMIN=TD, the TDMIN that test terminates to finally give is then for Best-case Response Time.
Average response time: assuming that definition average response time is TDAVG, all to be properly received message response time cumulative and for TDSUM, and all message numbers that are properly received are PKTOK, and current message response time is TD, and average response time computational methods are as follows:
During initialization, TDSUM is initialized as zero；
TDSUM=TDSUM+TD when receiving each message；
Average response time calculates: TDAVG=TDSUM/PKTOK.
High speed PING implementation method the most according to claim 1, it is characterized in that, described response processing module, be used for differentiating that currently received PING request message is the need of response, and produce PING response message, receive PING message response condition and specifically include:
1) receiving message is PING request message；
2) receiving PING request message target MAC (Media Access Control) address consistent with the machine MAC Address, purpose IP address is consistent with local IP address；
3) receiving PING request message source MAC inconsistent with the machine MAC Address, source IP address is inconsistent with local IP address；
4) receiving PING request message CRC32 verification correct, IP verifies and correct with ICMP verification and verification；
If currently receiving message to meet conditions above, then this reception message is determined as needing response, and described respond module regenerates PING response message, and concrete grammar is as follows:
1) exchange PING request message source and destination MAC Address, exchanges source and destination IP address；
2) type of message is revised as PING response message；
3) recalculate ICMP verification and；
4) recalculate CRC32 verification and.
High speed PING implementation method the most according to claim 1, it is characterized in that, described transmission message handover module, it is further used for receiving request message generation module and the two-way PING to be sent message of response processing module transmission, taking to arrive first and first go out principle, order sends two-way message to line side.
11. 1 kinds of conventional ping testing methods, based on high speed PING fast verification network performance device, this method of testing specifically includes:
It is the machine address that high speed PING fast verification network performance device assembles and send high speed PING request message, message source MAC Address and source IP address, and target MAC (Media Access Control) address and purpose IP address are far end response device address；
Far end response equipment receives PING request message and responds, and replys PING response message；
High speed PING fast verification network performance device receives PING response message and adds up, and calculates line bandwidth, packet loss and time delay.
12. 1 kinds of loopback ping testing methods, based on high speed PING fast verification network performance device, this method of testing specifically includes:
High speed PING fast verification network performance device assembles and sends high speed PING request message, and message source MAC Address, source IP address, target MAC (Media Access Control) address, purpose IP address are the machine address；
Remote loopback equipment or physical circuit, after ring, make no modifications and loopback receiving message；
High speed PING fast verification network performance device receives PING request message and adds up, and calculates line bandwidth, packet loss and time delay.
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