juniper asic

continuous upgrade of hardware and software, the development of layer-3 switching technology has also undergone a "three generations" change. The first generation switch is a mixture of discrete electronic components and primitive software frameworks. The software function runs on a processing machine with fixed memory. With the improvement of management support and protocol functions, software functions are also increasing. When your daily business is more dependent on the network and the traf

processors and memory become faster and more effective, the increase in communication traffic is more rapid. The first step to solve the problem is to simplify the network layer: replace vrouters with vswitches to reduce the overhead of data packets and significantly increase the transaction processing speed. Introduces a dedicated Integrated Circuit ASIC dedicated for optimizing Layer 2 processing. This improves the performance by 10 times and reduc

Switch module broadcasts an ARP request to Site B based on the route information. Site B receives the ARP request and then replies to the layer-3 Switch module with its MAC address, the layer-3 Switching Module saves the address and sends it back to the sender Site A. It also sends the MAC address of Site B to the MAC address table of the layer-2 switching engine. After that, when A sends all the packets to B, the information can be exchanged at A high speed. Because layer-3 processing is only

: layer-3 switch structure: ASIC chip and CPUASIC chip are used to complete forwarding of layer-2 and layer-3, the table contains the MAC address table used for layer-2 forwarding and the layer-3 forwarding table used for IP forwarding. The CPU is used for forwarding control. It mainly maintains some software table items (including route tables and ARP tables) and configures the hardware layer-3 forwarding table of

a Cisco Professional-level device uses a large number of ASIC chips to forward packets. In fact, it uses a hardware cache mechanism. If these hardware can also be inserted into the gateway running Linux, the network forwarding performance of Linux will inevitably be greatly improved. However, hardware insertion is very simple. How can we make the software work with the hardware? We know that the combination of hardware and no software is a pile of wa

that "Exchange" is a widely used term. When it is used to describe the second layer of the data network, it actually refers to a bridge device; when it is used to describe the third-layer device of the data network, it also refers to a routing device. We often mention that an Ethernet switch is actually a multi-port L2 network device based on the bridge technology, it provides low-latency and Low-overhead channels for data frame forwarding from one port to another. It can be seen that the core

widely used term. When it is used to describe the second layer of the data network, it actually refers to a bridge device; when it is used to describe the third-layer device of the data network, it also refers to a routing device. We often mention that an Ethernet switch is actually a multi-port L2 network device based on the bridge technology, it provides low-latency and Low-overhead channels for data frame forwarding from one port to another.It can be seen that the core of the switch should

Verificationo Synthesis+ ASIC+ FPGA+ Logic Minimization+ PCB Designo Educational* Other# Hardware Designs* Design Libraries* Computers* Embedded Systems* Processors* Interface* Control* Robotics* Audio* Video* DSP* Radio* Telecoms* Other# Groups and Organizationshttp://opencollector.org/summary.php-Foreign language4. The first Stop for the Latest ICs and componentsVery good about microprocessors, DSP, can program controller information of the website

combine the needs of customers, the choice of chip solutions for detailed understanding, especially for interface protocols and electrical characteristics.2. Understanding of communication protocols and standards:Communication equipment, as the name implies, is used to implement a variety of communication protocols (such as T1, E1, V.35,PDH, Sdh/sonet, ATM, USB, VoIP, WiFi, Ethernet, tcp/ip,rs232 and so on commonly used protocols) to achieve communication equipment, various circuits, PCB board,

| BNeverNeverKeyB 110NeverNeverKeyA | BNeverNeverNever 001NeverKeyA | BKeyA | B 011NeverKeyBKeyA | BKeyBNeverKeyB 101NeverNeverKeyA | BKeyBNeverNever 111NeverNeverKeyA | BNeverNeverNever For example, when block 3's access control bit C13 C23 C33 = 1 0 0, it indicates: Password A: it cannot be read. After verifying that KEYA or KEYB is correct, it can be written (changed ). Access Control: after verifying that KEYA or KEYB is correct, it is readable and writable. Password B: after verifying that

encapsulation geometric size makes the bonding difficult and damages the chip. Specialized ic asic is usually produced in small batches, increasing the difficulty of selecting the appropriate encapsulation. But the biggest difficulty is how to meet the requirements as high as possible for users with dedicated Number of pins. The current technology requires a lot of interconnection with printed boards in a very short time. Today, COB technology can pr

Never Keya | B Never Keya | B Never 1 0 0 Never Keyb Keya | B Never Never Keyb 1 1 0 Never Never Keya | B Never Never Never 0 0 1 Never Keya | B Keya | B Keya | B Keya | B Keya | B 0 1 1 Never Keyb Keya | B Keyb Never Keyb 1 0 1 Never Never Keya | B Keyb Never Never 1 1 1 Never Never Keya | B

emerged. Although it is still immature and rarely used, it may become a secondary VHDLAnd then, design another method of large-scale CPLD/FPGA. SelectVHDLOr is it using Tilde?This is the most common problem for beginners. In fact, the two languages are not very different, and their descriptive capabilities are similar. After learning one language, you can quickly learn another language through short-term learning. The language you choose depends on the usage habits of the people around you to

. In this process, data packets also accept some additional processing tasks. Improvement of network control capability Traditional routers cannot guarantee both performance and control functions. The control function is provided by a series of rules, for example, priority, access denied, or accounting data. When data packets enter the vro, these rules also apply to data packets. In a software-based Router, these rules are stored in a software database, and each data packet must be checked when

, they can only be regarded as prototypes," said MikeFitton, senior director of Achronix strategic planning and business development. "That's why they all use programmable logic. Standards are changing, and some different application scenarios are also emerging. So you need to establish some programmability in ASIC. The same is true for 3G and 4G. The early market of these technologies was almost entirely based on FPGA. After the market was mature, th

operation functions. The typical PLD is composed of "and", "non" array, with "and or" expression to implement any combination logic, so PLD can complete a large number of logical combinations in product and form.The 3rd stage Xilinx and Altera respectively introduced the standard gate array similar to the FPGA and similar to the PAL structure of the extended CPLD, improve the speed of the logic, with the architecture and Logic unit flexible, high integration and wide range of application featur

/bin/of Quartus).June long technology recommends that customers use Altera's officially recognized Red Hat Rhel 6.x server version of the 64-bit operating system, Altera does not recommend the Ubuntu operating system can also, but install Quartus II is a bit cumbersome.#备注: Quartus II has only 64-bit version starting from 14.0, this cracker has been verified under the 64-bit RHEL 6.5 operating system, no problem! 64-bit Rhel 5.x operating system because Altera will soon give up (14.0 now support

executes a target, however, Netfilter can do more. I have heard of network accelerators for a long time, but I have always felt that optimization of some algorithms by software is definitely impossible to increase the performance statistics by an order of magnitude. I must have some hardware help, even a Cisco professional-level device uses a large number of ASIC chips to forward packets. In fact, it uses a hardware cache mechanism. If these hardware

L2 switches generally use the CAM table in the hardware chip of ASIC (Application Specific Integrated Circuit, dedicated IC, therefore, the forwarding performance is very high. The layer-3 forwarding of a layer-3 Switch relies on the ASIC chip (the router's routing function depends mainly on the CPU software). However, apart from the CAM table used for layer-2 switching, A three-tier hardware Forwarding Tab

the third-layer device of the data network, it also refers to a routing device.We often mention that an Ethernet switch is actually a multi-port L2 network device based on the bridge technology, it provides low-latency and Low-overhead channels for data frame forwarding from one port to another.It can be seen that the core of the switch should have an exchange matrix to provide a channel for communication between any two ports, or a fast exchange bus, to send data frames received by any port fr