multicast troubleshooting

I. Description of the 1.1 Standard multicast interpretationCommunication is divided into unicast, multicast (that is, multicast), broadcast three kinds of waysUnicast means that the IP packet is transmitted by the router to the only device specified by the destination IP after the sender is sent, for example, you are now communicating with the Web server as a uni

UDP multicast can be used to broadcast data in the intarnet or Internet datagram mode (multicast over the Internet requires the router to support IGMP (Internet gateway management protocol, this Protocol appears after the IP address appears to support multicast )). compared with broadcasts that consume extremely bandwidth (broadcast can only be broadcast within t

On the Internet , multimedia services such as streaming media, video conferencing and video-on-demand are becoming an important part of information transmission. The unicast mode of point-to-point transmission cannot adapt to this kind of business transmission characteristic -- single point of sending multipoint receive, because the server must provide each receiver with a copy of the same content of the IP message, while the network also repeatedly transmits the same content of the message, occ

1. Introduction to unicast, multicast, and broadcast 1. 1. Unicast (unicast) Unicast means data transmission to a specific host. For example, an IP packet is sent to a host. At this time, the data link layer is given in the Data header is very specific destination address, for Ethernet, is the nic mac address (not FF-FF-FF-FF-FF-FF such address ). The current host with the routing function should be able to distribute unicast data in a targeted manner

1. Introduction to unicast, multicast, and broadcast 1. 1. Unicast (unicast) Unicast means data transmission to a specific host. For example, an IP packet is sent to a host. At this time, the data link layer is given in the Data header is very specific destination address, for Ethernet, is the nic mac address (not FF-FF-FF-FF-FF-FF such address ). The current host with the routing function should be able to distribute unicast data in a targeted manner

Programming | data In the information age, the application of network technology has been very common. Many of these applications rely on the ability to send the same information from one host to multiple hosts or from multiple hosts, and the number of distributed on the Internet may reach hundreds of thousands of, which requires higher bandwidth and is far beyond the ability to unicast. An important technology that maximizes the use of existing bandwidth is IP

Brief introductionBefore a manufacturer can manufacture a network card, it must register with the IEEE to obtain a vendor code length of 24bit, also known as OUI (Organizationally-unique Identifier). In the process of manufacturing the network card, the manufacturer will burn a 48bit bia (burned-in address, Cure addresses) address to each of the NIC's ROM, the first 3 bytes of the BIA address are the manufacturer's OUI, and the last 3 bytes are determined by the manufacturer itself, but differen

Learning Method:WhyWhatHowWhy does this technology come into being. Without this technology, what is the current situation?What is this technology? Its principle, operating process, its working process, its functions, and so onHow to Implement --- basic configuration, optimized configuration, advanced configuration, security features and summary.Advantages of Multicast:One-to-multiple, send data to multiple receivers at the same time.Bandwidth savingSaves hardware resources and so on.Vro with IP

IPV4 Multicast (multicast) mechanism refers to: the mechanism of sending and receiving IP multicast traffic. IP multicast traffic is sent to a single destination IP address, but is received and processed by multiple IP hosts, regardless of where the host is located on the IP internetwork. A host listens on a specific I

To accomplish useful work, peers in peer-to-peer applications must be able to discover each other and interact with each other. This article provides an implementation of a discovery based on IP multicast. Before a software entity can participate in a direct peer-to-peer interaction with a Peer-to-peer application feature, the entity must discover the appropriate peers to interact with. All available Peer-to-peer architectures provide a solution for

1, broadcast and multicast are only applicable to UDP, because TCP is connection-oriented, you need to bind two hosts two processes, that is, IP address and port pair2, usually, the network card can see every data frame in the net, but often it only accepts the destination address and its own MAC address of the same or broadcast address of the frame (now some can also receive a multicast address), and then

Network Communication: unicast, broadcast, and Multicast Directory: I. Classification of network communication, their definition and characteristics. 2. network topology model of unicast, broadcast, and Multicast Transmission Information. Iii. unicast, broadcast, and multicast programming instances. I. Classification of network communication, their definition an

UDP, broadcast and Multicast (7), udp Broadcast (Reference) TCP/IP explanation, Volume 1: Protocol UDP is a simple datagram-oriented transport layer protocol. Each output operation of a process generates a UDP datagram and assembles it into an IP datagram to be sent. UDp datagram is encapsulated into IP datagram format, for example: UDP Header The fields of the UDP header are as follows: The port number indicates the sending and receiving processes.

Article title: configure and use multicast IP technology for Linux networks. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. For example, the IP address of the local computer is 127.0.0.1. its multicast address is 224.0.0.1. This is defined by RCF 1390. To send IP

In the information age, network technology has been widely used. Many applications depend on the ability to send the same information from one host to multiple hosts or from multiple hosts to multiple hosts. The number of applications distributed on the Internet can reach 100,000, these require higher bandwidth and greatly exceed the unicast capability. IP multicast is an important technology that can maximize the use of existing bandwidth.1. Concepts

1. Introduction of unicast, multicast, broadcast 1.1. Unicast (unicast)Unicast is the transfer of data to a specific host. For example, send an IP packet to a host. At this time, the data link layer gives the data header inside is very specific destination address, for Ethernet, is the specific network card MAC address (not FF-FF-FF-FF-FF-FF, this is the broadcast address). Now the host with the routing function should be able to direct the unicast da

For a 2.6 kernel, there is a struct pointer inside the Net_device,struct dev_mc_list *dev->mc_listBy accessing it, you can loop through all of the multicast MAC addresses.However, the new kernel (at least 3.10) has changed, insteadstruct netdev_hw_addr_list mc;We can obtain the corresponding data by directly accessing the MC, or we can take advantage of the macros provided by the Linux kernel.netdev_mc_count(dev)This macro can get the current total nu

Dizzy, the article just sent is gone, and csdn is too frustrating. It's hard to write an article and submit it without responding.Recently, I was testing the sep4020 network. Because many Nic drivers that have been porting 4020 are not very familiar with the multicast part, but it was also directly transplanted like someone else's driver. Recently I wanted to test whether 4020 of multicast is supported. So

9. multicast forwarding-Multicast Routing Protocol The unicast routing protocol looks at the destination address of the package. The Multicast Routing Protocol depends on where the package comes from. It blocks the loop through RPF reverse route forwarding. RPF is used to determine whether the packet is received by the interface closest to the source --- use t

IANA has allocated the Class D address space to the IP multicast address. the address of the Class D space is located in the first four digits of the first byte and identified by the binary value 1110. therefore, the multicast address range is: 224.0.0.0 to 239.20.00000000d Class address: www.2cto.com byte 1 byte 2 byte 3 byte 41110 xxxx xxxxxxxxThe principle is as follows: the address of the space is expre