beaglebone ethernet

Recently, Cisco's switching is needed because of work. Of course, it is also the technology of switching. Simple operations have been completed in general work, but recently it was found that network performance is very low in a large-scale integration test. If the test line is on one line, the other won't be able to run. Looking for someone from another ccnp department, we found that the loop in the settings appeared. However, after the loop is solved, it still cannot work. So it is in debug. I

How can I do this without Ethernet for Iot!Based on enc28j60, our team independently implemented the Ethernet protocol stack tinyip. Currently, ARP, ICMP, TCP, UDP, and DHCP are supported, and only one DNS is complete.Tinyip has a built-in data buffer. After receiving the data, enc28j60 puts it into the buffer zone, tinyip then splits and restructured the data based on the

Article Source: http://ewangsoft.blog.163.com/blog/static/7721558220093200840864/ According to rfc894, the maximum length of the IP packet encapsulated by Ethernet is 1500 bytes. That is to say, the maximum length of the Ethernet frame should be the Ethernet header plus 1500, add a 7-byte leading synchronization code and a 1-byte frame start delimiter, specifica

This article was reproduced from: http://blog.csdn.net/LoongEmbedded/article/details/71477203In the recent Qualcomm platform Android5.1 Project, there is a need to set up an Ethernet MAC, the approximate process is that Windows writes to a flash patch to save the serial number and Ethernet MAC address, and then the Android client through the interface to read the string and display it, need to sync their MA

-100mbps Ethernet access to the door system has become a new trend of broadband access network.The current broadband IP network access network is basically based on broadcast technology Ethernet, the media Storage Control (MAC) protocol is the collision detection/carrier interception multi-channel Access Protocol (CSMA/CD). The basic principle of CSMA/CD is that each node on the network shares the same tran

An Ethernet switch comes with a serial cable for switch management. First, insert one end of the serial port cable into the serial port on the back of the switch. remote management cannot be implemented. So which method you use depends on your security and manageability requirements. Currently, many household switches have reached 100 Mbps, which can meet the needs of most users. Currently, switches have quickly replaced hubs and become the preferred

An improper port connection between Ethernet switches in Ethernet may cause a network loop. If the related switch does not enable the STP function, such a loop will lead to endless data packet forwarding, forming a broadcast storm, this causes network faults. One day, we found a problem with a VLAN in the campus network performance monitoring platform-the connection between the access switch and the campus

Vro functions are more powerful than vswitches, but the speed is relatively slow and expensive. The ethernet switch has both the ability to forward packets at the wire speed and the good control function of the vro, therefore, it has been widely used by many enterprises. "Switch" is the most frequently used word on the network today. It can be applied on any occasions from the bridge to the ATM to the telephone system, so you cannot figure out what is

I, Ethernet IIEthernet Type II Ethernet frames have a minimum length of 64 bytes (6+6+2+46+4) and a maximum length of 1518 bytes (6+6+2+1500+4). The first 12 bytes respectively identify the source node MAC address of the sending data frame and the destination node MAC address of the receiving data frame.The next 2 bytes identify the upper-layer data type that is carried by the

Abstract: This article introduces the hardware implementation method of Ethernet MII Interface Based on FPGA and extended functions. The hardware structure consists of the control signal module, divider, asynchronous FIFO buffer, and 4b/5b encoding. Key words: M Ethernet MII; FPGA; Parity divider; 4b/5b codec; asynchronous dual-port FIFO Introduction Traditional PC-centered Internet applications have now be

For most businesses in the Ethernet network, the operator cannot fully control the client device or media physically. Operators must logically control users or devices to operate and manage broadband services. This control process is mainly achieved through authentication and authorization of users and user devices. Analysis of Ethernet user access authentication technical requirements Due to the increasin

This article mainly introduces the Ethernet MAC address of the CISCO router IOS, what is the MAC address, and the configuration introduction. I believe this article will help you. Most of you may know what an Ethernet MAC address is, but you may not know how to apply a MAC address in a Cisco Internet Operating System. An Ethernet MAC address uniquely identifies e

The upper application encapsulates the data into an IP packet and then encapsulates it into a frame (the router receives a data frame, forwards a data frame, not a packet, he simply takes the number of received frames apart, exposing the three-layer header, The IP address in the header in the packet is only to determine the destination of the forwarding. frame = Frame Header control information + data part + Frame endThe format of the frame is determined by the encapsulation protocol of the i

Ethertype: Ethernet Type field and ValueEthertype is a field in an ethereframe. It is used to specify the Protocol applied to the frame data field. According to 802.3, the length/ethertype field is a field of two eight character segments. The meaning of the two is one, depending on the value. In quantitative evaluation, the first eight-byte field is the most important. When the field value is greater than or equal to the decimal value 1536 (that is, t

Block Chain Academy (6): Ethernet Workshop production network/test network/private network to understand the etheric square Privatenetwork first understand the two official networks of the etheric square At present, there are two networks of network production Environment Network test network testnet by Ether Square. The following will be a brief explanation of the two network Ethernet production Network

Release date:Updated on: Affected Systems:Huawei Ethernet Switches S9300Huawei Ethernet Switches S6300Huawei Ethernet Switches S5300Huawei Ethernet Switches S3300Huawei Ethernet Switches S2300Description:----------------------------------------------------------------------

Release date:Updated on: 2013-03-01 Affected Systems:Intel 82574L Gigabit Ethernet Controller 2Description:--------------------------------------------------------------------------------Bugtraq id: 57843 Intel 82574L Gigabit Ethernet Controller is a Gigabit Nic. Intel 82574L Ethernet Controllers does not properly process valid, specially crafted, and hexadeci

Ethernet is the undisputed overlord of the Internet world. It has been firmly occupying the territory of commercial office environments in recent years. The field of control and automation is also moving towards this open, standards-based technology. Do you think the cables used at the reception desk can also meet the demanding requirements of industrial process control and automation technology environments? In fact, COTS (Popular) 5e unshielded twis

The next evolution of the Wi-Fi standard, 802.11ac, will provide faster wireless connection speeds and higher data transmission rates, which will play a role in promoting network video browsing and uploading and downloading large-capacity files. Although wireless technology is booming, it cannot completely replace wired Ethernet. Analysts pointed out that the cost of Wired connection is relatively low and will still be favored by the market. Market re

How does the Linux kernel receive different types of ethereframes-general Linux technology-Linux programming and kernel information? For more information, see the following. 1. Preface In addition to the 6-byte destination MAC address and 6-byte source MAC address, the Ethernet frame type value of the two bytes also exists in the Ethernet header, for example, IPv4 is 0x0800, ARP is 0x0806, etc, after th