雙電口采集卡介紹資料-中英版
雙電口10/100/1000M測試采集卡為自主設(shè)計(jì)、研發(fā)，用于自主知識產(chǎn)權(quán)。
Double FE ports 10/100/1000 testing acquisition card is a product with independent design, research and development. We claim the independent intellectual property rights.
自主研發(fā)的專用測試采集卡可以支持?jǐn)?shù)據(jù)采集、過濾、高精度時(shí)戳、底層協(xié)議處理等普通網(wǎng)卡所無法支持的功能，是監(jiān)測領(lǐng)域數(shù)據(jù)采集處理必需的設(shè)備。
Independent research and development of special test acquisition card can support data collection, filtration, high precision time stamps, the underlying protocol processing such as ordinary card does not support function, monitoring field data collection and processing is the necessary equipment.
自產(chǎn)10/100/1000M數(shù)據(jù)采集卡和通用10/100/1000M的比較
兩種硬件板卡的框圖
圖1 自產(chǎn)10/100/1000M數(shù)據(jù)采集卡框圖
圖2 10/100/1000M通用網(wǎng)卡框圖
Self produced 10/100/1000 MB of data acquisition card and general 10/100/1000 mn
Block diagram of hardware interface cardü
Figure I Self produced 10/100/1000 m diagram of the data acquisition card
Figure II 10/100/1000 m general card block diagram
從硬件框圖的比較可以看出，自產(chǎn)的測試卡比通用網(wǎng)卡多路很多的內(nèi)容，這些多出的部分就是專門為了解決網(wǎng)絡(luò)測試問題而設(shè)計(jì)的。
From the hardware block diagram of the comparison we can see that this test card has a lot of content more than the general card, which is specially designed to solve the problem of network testing.
RX FPGA1 L2PM 是一片百萬門級的FPGA(現(xiàn)場可編程門陣列)芯片，相當(dāng)于奔騰級芯片所用的等效門數(shù)。主要完成2路（或4路）GE信號物理層光功率測試、計(jì)算、比較；MAC層的全面的統(tǒng)計(jì)功能，包括RMON2的統(tǒng)計(jì)，MAC層的過濾，另外對收到的錯誤包進(jìn)行處理功能；對FPGA2送來的數(shù)據(jù)加上MAC地址和CRC發(fā)送。
RX FPGA1 L2PM level is a millions level of FPGA (field programmable gate array) chip, which is equal to the number of the equivalent gate used in safe chip level. Main completed 2 (or 4) GE signals the physical optical power test, and calculation and comparison; MAC layer of comprehensive statistics, including RMON2, MAC layer filtration, another of the received packet processing functions; To add the MAC address FPGA2 sent data sent and CRC.
RX FPGA2 L3PM 也是一片百萬門級的FPGA芯片。主要完成2路（或4路）GE信號IP層的統(tǒng)計(jì)功能，IP層的復(fù)雜條件的組合過濾，另外對收到的錯誤包進(jìn)行處理功能，還能完成分片包的組裝等功能；下面的表會對這些功能進(jìn)行詳細(xì)的描述。
RX FPGA2 L3PM is also a door millionaires FPGA chip, with main completed 2 (or 4) GE signals IP layer statistical functions. The combination of the complex conditions of IP layer filtration, another of the received packet processing function, and can also complete the shard package assembly, and other functions; The following table for these functions are described in detail.
FPGA3 是一片40萬門級的FPGA芯片。主要完成同主機(jī)之間的數(shù)據(jù)通訊，能主動的控制調(diào)節(jié)和主機(jī)之間的傳輸流量，有效的防止數(shù)據(jù)丟失。如果主機(jī)忙，它就先把數(shù)據(jù)存到板卡的存儲器中，等主機(jī)有空的時(shí)候送出；當(dāng)板卡存儲的數(shù)據(jù)到了一定的容量的時(shí)候，會主動通知主機(jī)，取走數(shù)據(jù)。這樣保證數(shù)據(jù)不會丟失。
FPGA3 is a 400000 level FPGA chip. Mainly complete with data communication between the host, which can actively control and traffic between the host and effective to prevent data loss. If the host is busy, it shall be first to the board of the data storage, such as the host is sent out when you are free; When the board the data stored by a certain amount of time, will take the initiative to inform the host, remove data. This data is not lost.
自產(chǎn)板卡上總共可以支持最多1GB的存儲容量，保證數(shù)據(jù)有足夠的緩存空間。板卡對數(shù)據(jù)的緩存最多可以達(dá)到3.6秒。
Self produced board can support up to a total of 1 gb storage capacity, ensure enough data cache space. The board of the data cache is up to 3.6 seconds.
功能方面
Functions
功能方面首先介紹通用網(wǎng)卡的功能。
First this paper introduces the function of general network card function.
通用網(wǎng)卡是為以太網(wǎng)設(shè)備之間通訊用的硬件，所以主要功能是完成數(shù)據(jù)物理層、MAC層的接收、發(fā)送功能，并且對MAC層的信息進(jìn)行一些簡單的統(tǒng)計(jì)，比如接收到的MAC幀數(shù)、字節(jié)數(shù)、錯誤的MAC幀數(shù)等進(jìn)行計(jì)數(shù)。對接收的數(shù)據(jù)進(jìn)行簡單的校驗(yàn)，如果數(shù)據(jù)錯誤，直接丟棄，由上層軟件完成數(shù)據(jù)重發(fā)的請求（這種情況對于測試來說，就是非常致命的問題，因?yàn)樵跍y試的時(shí)候，數(shù)據(jù)包被丟失，測試卡是不能請求重發(fā)的，這樣實(shí)際在測試時(shí)就是丟包，會造成上層軟件不能完成合成功能）；對于正確的數(shù)據(jù)，全部通過PCI接口送到了主機(jī)上，主機(jī)收到數(shù)據(jù)后，軟件完成對接收數(shù)據(jù)的分層統(tǒng)計(jì)，還有其他后續(xù)的解碼、分析的工作。
General network card is for communication between Ethernet device with hardware, therefore, the main function is to complete the data receiving, sending function of the physical layer and MAC layer, and the MAC layer information carry on some simple statistics, such as the received MAC frames and the number of bytes, wrong MAC frame to count. To simple checking of the received data, if the data error, discarded directly, by the upper software complete data retransmission request (for testing, this is very fatal problem, because at the time of test, data packets are lost, the test card can't request retransmission, so actual is packet loss during the test, will cause the upper software can't complete the synthesis function); For the correct data, all through the PCI interface to the host, the host after receiving the data, software for receiving data of layered statistics, there are other subsequent decoding and analysis process.
自產(chǎn)的數(shù)據(jù)采集卡是專門針對以太網(wǎng)測試用的硬件，考慮到測試時(shí)對數(shù)據(jù)完整性的要求、對網(wǎng)絡(luò)全面測試的要求、線速接收處理能力的要求、軟件處理速度慢的特點(diǎn)而專門設(shè)計(jì)的，著重是解決這些問題。從物理層的信號強(qiáng)度測試、碰撞檢測；MAC層的全面的數(shù)據(jù)統(tǒng)計(jì)；IP層的全面統(tǒng)計(jì)，IP層的多種過濾條件的組合過濾；TCP/UDP層的統(tǒng)計(jì)、過濾，還有對端口類型的統(tǒng)計(jì)和過濾；還可以對內(nèi)容進(jìn)行多字節(jié)匹配、過濾等，都能幫助用戶更好、更快的維護(hù)網(wǎng)絡(luò)。
Self produced data acquisition card is designed for Ethernet hardware test, considering the test requirement for data integrity. The requirement of network comprehensive testing, line speed to receive processing power requirements, software processing speed slow, specially designed for the characteristics of focus on is to solve these problems. From the physical layer signal strength test, collision detection; MAC layer comprehensive data statistics; IP layer of comprehensive statistics, IP layer combination of a variety of filter filtration; TCP/UDP layer statistics, filtered, and statistics of port type and filtering; Can also be multisystem matching, filtering and so on the content, can help users better, faster maintenance of the network.
2014.6.11