ethernet 1588

1. Introduction The IEEE 802.3z Gigabit Ethernet Standard, adopted in June 1998, describes 3 physical layer interfaces (1000BASE-SX, 1000BASE-LX, and 1000BASE-CX) that are used for a universal link encoding and can be 1000mb/s transmitted. 1000BASE-SX, 1000BASE-LX interface using optical fiber as a medium, the farthest transmission distance of up to 5000 meters, so can be used in buildings or campus backbone network. The 1000BASE-CX interface is plan

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

What is a vswitch port? What is the role of the vswitch port? Vswitches cannot play their role in optimizing network performance. After reading this article, you will surely have a lot of GAINS. I hope this article will teach you more. In an Ethernet Switching environment, communication between two workstations is usually not intercepted by a third party. In some cases, we may need such listeners, such as protocol analysis, traffic analysis, and intru

The most important function of a vswitch is to speed up the fast data forwarding in a large local area network. The routing function is also used for this purpose, so the switch port issue is also very important, it is really not easy to set a vswitch port. In an Ethernet Switching environment, communication between two workstations is usually not intercepted by a third party. In some cases, we may need such listeners, such as protocol analysis, traff

Ethernet access technology is still quite common, and it is also a type of access technology that deserves our research. So I have studied the characteristics and advantages of the Ethernet access technology, and I will share it with you here, I hope it will be useful to you. With the rapid development of the Internet, IP has dominated various terminal applications, and no one will doubt the mainstream netw

The birth of VDSL is not as elegant as ADSL, but more and more people are paying attention to it. Recently, TP-Link, known for pushing low-end network products, also launched a VDSL switch TD-VF1008. Tu qianliang, Project Manager of the TP-Link product department, stressed: "The biggest benefit of VDSL is that it breaks through the distance constraints of Traditional Ethernet ." In fact, VDSL is similar to ADSL in terms of technical implementation. It

About the verification algorithm learning (learning Ethernet encountered) Ethernet header or data will have a check, the implementation of the IP core on the FPGA, with CRC Check, and then learn the ICMP protocol, also see a check algorithm, in order to learn the rationale behind the analysis.First, look at the ICMP packet format, mainly the ping command is used (there will be a specially ping C language im

The second wave of 802.11ac may force the upgrade of Enterprise Ethernet Switches The second wave of high bandwidth of 802.11ac may force enterprises to upgrade to a faster Ethernet switch in 2015. With the adoption of the second wave of 802.11ac wireless technology in 2015, many enterprises may need to upgrade Ethernet switches to support wireless network conne

How to solve the problem of Ethernet switch parameters the switch can be divided into Layer 2 switches, Layer 3 switches, and Layer 4 switches according to the working protocol layer, you can divide network-managed switches and non-managed switches based on whether the network management function is supported. This article will describe how to set parameters for the Ethernet switch. Packet forwarding rate i

Documents involved:(1) build/: Add Ethernet File support Pathmap.xml (2) framwork/base/ Android.mk Core/jni/android.mk Ethernet/ethernetstatetracker.java Ethernet/ethernetmanager.java Erthernet/ethernetmonitor.java Ethernet/ethernetdevinfo.java

1 Introduction With the development and maturity of Ethernet technology, it is widely used. The interconnection technology of Ethernet has also evolved from bus-type networks with dedicated coaxial cables to multi-layer switches. The efficiency and reliability of transmission and exchange are greatly improved. In a common commercial network, due to the high performance and scalability of switches, it has gr