ethernet 1588

Network Testing helps the development of Ethernet technology to mature, and more detailed tests will also help those who still have doubts about Ethernet technology to build confidence. Ethernet is evolving from 10 m to 10G, and various technical updates are constantly carried out. Of course, Ethernet's most important device-switch is changing with each passing d

Android Ethernet 1 from top to bottomRecently, many framework problems have been encountered, such as network port disconnection after startup. The network display icons in the status bar and settings are not updated, and the dual network port needs to be removed, this article describes the top-to-bottom framework structure of Ethernet. Due to limited capabilities and time, the analysis in this article is n

The air on the weekend was sultry, and the thought of it would never rain again. Every weekend, I will sum up all the things of the week, whether at work, in life, or on the way to and from work, or after reading, because it is no longer raining, I decided to have a good sleep on Saturday evening. When I explained the principles of vswitches and hubs to my colleagues, I thought that hub is a more efficient choice, what is the difference between iptables's simple cluster target and F5's high Serv

In Solaris, how to configure FCHBA to an Ethernet card, IPFC, can easily set an FCHBA card to an Ethernet card, which is of great significance in reality. In some work sites, if you need to copy a large amount of data through the network, it is often found that the speed of the Gigabit Nic is not enough ,... in Solaris, how to configure the fc hba to an Ethernet

This article describes the use of Pf_packet and Sock_raw to send themselves a defined type Ethernet packet, using the Wireshare capture packet to get to the packet and pave the line for adding a network protocol to the Linux kernel.First on the code:#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define Eth_p_dean 0x8874//self-defined

First, about the minimum length of Ethernet packets in Wireshark, see the following text:Packet FormatA Physical Ethernet Packet would look like this: preamble destination MAC address source MAC address type/length user Data frame Check Sequence (FCS) 8 6 6 Span style= "font-size:15px;" >2

Its UNIX systemschanging Ethernet Media speed for AIXFirst you need to find out the device name of your Ethernet card. It should is ent0 if the machine had only 1 Ethernet card. Otherwise, it may be a higher number.You can determine the legal values for the media speed of the card by running the following command (where the value of the May is different if y

Http://www.cnblogs.com/blockchain/p/7943962.html Directory 1 Distributed Network Introduction Introduction of 1.1 Kad network 1.2 Kad network node distance 1.3 K Barrel 1.4 Kad Communication protocol 2 Neighbor Nodes Main members of the 2.1 nodetable class 2.2 Neighbor Node Discovery method 2.3 Neighbor node network topology and refresh mechanism. 1 Distributed Network Introduction Ethernet Square bottom of the distributed network is Peer-to-peer n

First, determine whether there is network data connection:The most basic network state judgment, if there is no network connection, all operations will not go on.Microsoft.Phone.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable ()Second, determine the network type (gsm/cdma/wifi/ethernet):In the general application, need to know the network status is also three kinds: No network, wifi/ethernet,

Resolving network bottlenecks Gigabit Ethernet becomes the key As IT departments add input/output-intensive and communication-intensive applications to servers, data center networks are facing a significant increase. Systems installed around 1 GbE are no longer efficient; in many cases, replacement technology: 10 GbE is also a network bottleneck. Fortunately, there are more than one way to clear up congested network traffic, from low-cost, fast-acti

An analysis of the two-layer VLAN forwarding of Huawei Ethernet switches and its advantages. To solve the problem of VLAN introduced by Huawei Ethernet switches, we must first understand the benefits brought by VLAN introduction. Remember the corresponding instance. Therefore, it is very advantageous to study the following carefully. Packet forwarding thread: After VLAN is introduced, the packet forwarding

The Linux kernel receives the Ethernet frame processing program-general Linux technology-Linux programming and kernel information. The following is a detailed description. 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, IP

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

With the development of network technology and the popularization of information application, Ethernet switch has been used more and more widely. According to IDC statistics, 2001 domestic switch market value of 6.77 billion yuan, to 48% of the share of the router (46%) ranked in the first place in the network market. Thus, the switch has literally become the most mainstream product in the network market. Three major factors contribute to the rapid g

With the development of network technology and the popularization of information application, Ethernet switch has been used more and more widely. More importantly, it began to penetrate from the simple LAN application to the metropolitan area Network, thus attracting more operators ' eyes. The rapid growth of the switch market, in addition to the overall growth of the network market, mainly benefited from the following aspects. First of all,

Often see ppp,pppoe these nouns, at that time also looked at a lot of information, but has not quite understood what this is what, what to use, today calm down, read a bit more information, have some preliminary understanding, record down, later have a new understanding and revise.First, slip,ppp,ethernet are all link-layer protocols.Slip and PPP are point-to-point protocols, and the concept of MAC addresses is added to the

There are still many things worth learning about configuring routers. Here we mainly introduce Ethernet port configuration, X.25 configuration, and so on. Routers play an important role in computer networks and serve as a bridge between computer networks. It not only connects to different networks, but also selects data transmission paths and blocks illegal access. Configuring a router is not very easy for beginners. We will introduce general router c