Exploring multicast IP in Linux
MANY LISTENERS
Author(s): TOMASZ BARTCZAK, MACIEJ PIECHOWIAK, TOMASZ SZEWCZYK, and PIOTR ZWIERZYKOWSKI
We show you the practical side of multicasting, including a sample configuration that uses the free XORP routing protocol suite.
IP networks have supported multicast transmission for nearly 20 years, but the technology has only recently entered the realm of widespread use. As the name implies, multicasting is a technique for transmitting data from a single source to a predefined collection of recipients. This concept poses some special challenges that aren’t seen in more conventional transmission techniques, such as broadcasting, in which the message is sent to all computers on a network segment, and unicasting, in which a message passes from a single source to a single recipient.
Efficient use of multicasting can significantly reduce traffic load, especially on networks that support streaming-style multimedia transmissions. Multicasting applications and technologies have received increased attention with the rise of audiovisual technologies; however, multicasting remains a mystery to many software developers, system admins, and end users who might benefit from more extensive use of this promising technique. In this article, we offer a glimpse at the practical side of multicasting, including a sample configuration that uses the free XORP routing protocol suite.
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