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計、研發，用于自主知識產權。

 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.

 自主研發的專用測試采集卡可以支持數據采集、過濾、高精度時戳、底層協議處理等普通網卡所無法支持的功能，是監測領域數據采集處理必需的設備。

 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10/100/1000M數據采集卡和通用10/100/1000M的比較

兩種硬件板卡的框圖

圖1 自產10/100/1000M數據采集卡框圖

圖2  10/100/1000M通用網卡框圖
 

 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，自產的測試卡比通用網卡多路很多的內容，這些多出的部分就是專門為了解決網絡測試問題而設計的。

 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(現場可編程門陣列)芯片，相當于奔騰級芯片所用的等效門數。主要完成2路（或4路）GE信號物理層光功率測試、計算、比較；MAC層的全面的統計功能，包括RMON2的統計，MAC層的過濾，另外對收到的錯誤包進行處理功能；對FPGA2送來的數據加上MAC地址和CRC發送。
 

 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層的統計功能，IP層的復雜條件的組合過濾，另外對收到的錯誤包進行處理功能，還能完成分片包的組裝等功能；下面的表會對這些功能進行詳細的描述。

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。主要完成同主機之間的數據通訊，能主動的控制調節和主機之間的傳輸流量，有效的防止數據丟失。如果主機忙，它就先把數據存到板卡的存儲器中，等主機有空的時候送出；當板卡存儲的數據到了一定的容量的時候，會主動通知主機，取走數據。這樣保證數據不會丟失。

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.
 自產板卡上總共可以支持最多1GB的存儲容量，保證數據有足夠的緩存空間。板卡對數據的緩存最多可以達到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卡的功能。

First this paper introduces the function of general network card function.
 通用網卡是為以太網設備之間通訊用的硬件，所以主要功能是完成數據物理層、MAC層的接收、發送功能，并且對MAC層的信息進行一些簡單的統計，比如接收到的MAC幀數、字節數、錯誤的MAC幀數等進行計數。對接收的數據進行簡單的校驗，如果數據錯誤，直接丟棄，由上層軟件完成數據重發的請求（這種情況對于測試來說，就是非常致命的問題，因為在測試的時候，數據包被丟失，測試卡是不能請求重發的，這樣實際在測試時就是丟包，會造成上層軟件不能完成合成功能）；對于正確的數據，全部通過PCI接口送到了主機上，主機收到數據后，軟件完成對接收數據的分層統計，還有其他后續的解碼、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.
 自產的數據采集卡是專門針對以太網測試用的硬件，考慮到測試時對數據完整性的要求、對網絡全面測試的要求、線速接收處理能力的要求、軟件處理速度慢的特點而專門設計的，著重是解決這些問題。從物理層的信號強度測試、碰撞檢測；MAC層的全面的數據統計；IP層的全面統計，IP層的多種過濾條件的組合過濾；TCP/UDP層的統計、過濾，還有對端口類型的統計和過濾；還可以對內容進行多字節匹配、過濾等，都能幫助用戶更好、更快的維護網絡。

 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