multicast troubleshooting

,senferaddsize);Here is a message like this broadcast Group, note that the address sent is the broadcast address Inaddr_broadcast, the port number is the port number of the reorganization broadcast 11114Sockaddr_in Dstadd;Dstadd.sin_family=af_inet;Dstadd.sin_port=htons (11114);Dstadd.sin_addr.s_addr=inaddr_broadcast;SendTo (S,data (), totalbyte,0, (sockaddr*) dstadd,sizeof (sockaddr));Second, multicast1. InitializationWSAStartup (Makeword (2,2), wsad);2. Create a socket for

Reliable Multicast Programming (PGM) This section describes the Pragmatic General Multicast (PGM) multicast protocol implementation in Windows, often referred to as reliable multicast. Reliable multicast is implemented through Windows Sockets in Windows Server 2003 and later

13. multicast routing protocol-PIM (protocol-Independent Multicast Routing Protocol) Multicast Routing Protocol classification-dense mode and Sparse Mode Multicast branch tree 1. STP ---- source tree, Shortest Path Tree To maintain table items (S, G), it indicates the tree closest to S) It consumes a lot of memory

To do useful work, P2P applications must be able to discover and interact with each other. This article provides an implementation of IP multicast-based discovery. Before a software entity can participate in direct peer-to-peer interaction with P2P applications, the entity must discover the appropriate Peer-to-Peer Points to interact. All feasible P2P architectures provide a solution for Problem Discovery. In this article, I will describe the implemen

PIM-DM Basics PIM-DM uses five RIMv2 messages Hello Join/Prune (Add/CUT) Graft grafting) Graft-ACK (OK) Assert (Declaration) The PIMv2 router uses the Hello message to discover the neighbor, when the PIMv2 router PIM-SM or PIM-DM) is active, will periodically send the Hello Message on each interface configured with PIM; PIMv1 vro has similar functions, but uses Query messages. A Hello (or Query) message contains a storage time holdtime, which specifies the maximum time for a neighbor to

Layer 2 multicast configuration case requirements 1. Three S3600-SI and a S3600-EI composed of two layer multicast network, SwtichA selected S3600-EI, SwitchB, SwitchC, SwitchD selected S3600-SI; 2. multiple Multicast sources can be connected to any of the four S3600 Series Products, and the receiving end can only be connected to SwitchA to receive

the role of multicast and IGMP---------------------------------The so-called multicast, as opposed to unicast and broadcast, refers to the network host will send the data at once to multiple target hosts belonging to the same group. The main use of the IGMP protocol. IGMP is the meaning of Internet Group Management protocol. The protocol is used toThe multicast g

IOS multicast delegate (GCDMulticastDelegate), iosdelegate In IOS, there are several methods to implement callback: Among the above four types, delegate and block are commonly used in my own projects. In reality, callback requirements are also divided into two types One-to-one callback can be implemented using delegate and block in IOS. The one-to-many callback is basically the notification center. If you have a requirement, we will use image downloa

Basic multicast knowledge: Common IP communication is performed between a sender and a receiver. We call it point-to-point communication. However, for some applications, this point-to-point communication mode cannot effectively meet the needs of practical applications. For example, a digital teleconference system is composed of multiple venues. When participants in one of the venues speak, other venues are required to instantly obtain the content of t

How to configure cross-route access in NLB multicast Mode Some time ago, because a large number of shared files were required to be accessed, two servers were configured to improve the concurrent access speed, and NBL for windows was used for configuration. There were many configuration methods on the Internet. After configuration, multicast can be accessed locally, but it cannot be accessed from other netw

Source: "Bi Thing" data flow conversion-multicast, Union all, merge, merge JoinSet up test data:CREATE TABLEFactresults (NameVARCHAR( -), CourseVARCHAR( -), scoreINT )INSERT intofactresults (Name, Course, score)SELECT 'Zhang San' , 'language' , - UNION All SELECT 'Zhang San' , 'Mathematics' , the UNION All SELECT 'John Doe' , 'language' ,

Import Java.awt.dimension;import java.awt.textarea;import Java.awt.textfield;import Java.awt.toolkit;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.awt.event.windowadapter;import Java.awt.event.windowevent;import Java.io.ioexception;import Java.net.datagrampacket;import java.net.InetAddress; Import Java.net.multicastsocket;import Javax.swing.jbutton;import Javax.swing.jframe;public class Multicast extends JFrame imp

, fp)! = NULL) {Sendto (SOCKFD, Sendline, strlen (Sendline), 0, pservaddr, Servlen); Alarm (5); for (;;) {len = Servlen; n = recvfrom (SOCKFD, Recvline, MAXLINE, 0, preply_addr, len); if (n Iv. Multicast 1. Multicast address 1). IPV4 multicast address and IPV6 multicast address

The initial purpose of the packet broadcast method is to discover resources and reduce the amount of data interaction. But in fact, because of packet broadcasting, all hosts in the same network segment must complete data processing whether they are involved in broadcast applications or not. The broadcast UDP packets are processed layer by the system protocol stack of the host until the transport layer delivers them to the application process listening to the corresponding port or discards them.

Linux under TCP,UDP and broadcast and multicast Communications (Code encyclopedia) TCP, UDP, broadcast, multicast client server code link addresses are (for free): TCP Code: http://download.csdn.net/detail/huangminqiang201209/4860661UDP Code: http://download.csdn.net/detail/huangminqiang201209/4860665Broadcast code: http://download.csdn.net/detail/huangminqiang201209/4860672Multicast code: http://download

I. Communication modes are classified in IPv4 networks. There are three communication modes available for the host: 1. unicast: data communication between a single host and a single host 2. Broadcast: A single host sends data packets to all hosts in the network. 3. Multicast: A single host sends data packets to a selected group of hosts for different unicast, broadcast, and multicast purposes, and uses diff

asynchronous communication system, it also integrates distributed systems based on data communication. By providing message transmission and Message Queuing Models, it can expand inter-process communication in a distributed environment and support multi-communication protocols, languages, applications, hardware, and software platforms. Currently, popular mom middleware Products include IBM MQSeries and Bea.Messageq and activemq of Apache. Message-oriented middleware generally has two transmissi

1. repeatedly broadcast a piece of news.Code: Package mulsocket. frombook; Import java.net .*; Public class broadcast extends thread { String S = "today's weather is fine, good scenery everywhere! "; Int Port = 5858; // The multicast port. Inetaddress group = NULL; // multicast group Multicastsocket socket = NULL; // multicast socket Broadcast (){

1. Introduction Unicast transfers data to a specific host. If an IP packet is sent to a host, the link layer header is a very specific destination address. For Ethernet, It is the MAC address of the NIC. Broadcast and multicast are only used in UDP. They are very important for applications that need to transmit packets to multiple receivers at the same time. Broadcast is to send packets to all hosts on a network. The network may be a network, a

Broadcast and multicast are only applicable to UDP. Generally, each Ethernet frame is sent only to a single destination host. The destination address specifies a single receiving interface, which is called unicast ). A host sends frames to other hosts on the Internet. This is broadcast. Multicast (multicast) is between unicast and broadcast: Ethernet frames are s