IP multicast


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IP multicast

A one-to-many transmission of data over an IP network. It is used for myriad purposes including updating routers, announcing and discovering services and streaming media. IP multicast saves network bandwidth, because packets are transmitted as one stream over the backbone and only split apart to the target stations by the router at the end of the path. See mDNS and multicast.

Multicast Address Range
IP multicast packets are identified by using a destination address in a range from 224.0.0.0 to 224.0.0.255. The addresses within the range are reserved for specific purposes. For example, 224.0.0.1 means all nodes on the subnet, while 224.0.0.2 means all routers on the subnet. The address 224.0.0.251 is reserved for multicast DNS (mDNS), which is used to query devices for their capabilities. For the complete list, visit www.iana.org/assignments/multicast-addresses. See DVMRP, MOSPF and PIM.
References in periodicals archive ?
The new Orem data center will serve as a regional hub for Endavo's national IP Multicast Network and will be managed by the Endavo Ecosystem, which efficiently manages access, operation and accounting of the entire system.
The Inverse Multiplexor and the REDundancy option combined with support for IP Multicast addresses the Broadcast Industry's demand for always on service delivery.
Moreover, when the industry deploys reliable IP multicast solutions, streaming media across the Internet will become sufficiently trustworthy enough for companies to send business-critical messages.
BackWeb's membership in the IP Multicast Initiative (IPMI) is a response to customer interest in real-time, scalable push solutions that complement BackWeb's "polite" delivery of personalized content.
Their value-added features, such as packet filtering, fine granularity rate shaping, rich entries of IP Multicast and processor-based address learning, exceed current Web Smart switch requirements, providing OEMs and ODMs with advanced features without requiring what, up to now, has meant a costly jump to enterprise class silicon.
applications now use IP Multicast, including ones that perform audio and
IP Multicast support is a key requirement for equipment that claim to provide scalable, standards-based delivery of content to subscribers.
This implementation follows a November 2004 announcement of the companies' intention to jointly develop the first nationwide IP Multicast Network across America.
provides managed IP delivery solutions for digital entertainment, data and voice products over a national IP Multicast fiber network and over any last-mile broadband medium (fiber, copper, wireless).
The reliability of the Cisco IP core, Cisco IP multicast, Quality of Service and DPT/RPR technologies and Catalyst 6500 products were important factors in our decision to adopt this model for video content delivery," said Eduardo Belda, CTO, ONO.