![]() That way, the routers can ensure that a single copy of the multicast feed is transmitted on each link, at least most of the time. The routers are the subscription agency, tracking whether any LAN group of readers needs a copy of a particular multicast feed, and where they are. Admittedly, the magazine is being shared around with others. The way I think of multicast is that it is like subscribing to a magazine. ![]() See the links below for other protocols in development, like BGMP. Multicast Address Dynamic Client Allocation Protocol Roleĭistance Vector Multicast Routing Protocol It also introduces the acronyms and names of the protocols we’ll be talking about. The following table should make sure that everyone is equally confused. The course was in part authored by Beau Williamson, author of the Cisco Press book on IP multicast. Firing off IP/TV at the end of the course is a really nifty way to see results! By the way, there is now an enhanced version of the Cisco multicast course for CCIP certification, MCAST. ![]() (Unsolicited plug!)īy the way, if you’re interested in multicast, we cover the basics of PIM (see below) in the Switching course, BCMSN. You do have to buy the hardware and architect your solution to scale, but the actual video administration can probably be done by a PC technician. The sense I get is that people are using it because it just works, with relatively little fuss. Where can you get yourself some multicast for your network? Well, for one thing, there seems to be a surprisingly large number of Enterprise Cisco customers using the IP/TV product to distribute video over IP multicast, usually for training of new low tech employees (which is where the large numbers are). Lately I’ve been hearing about more and more companies working with multicast. See those links for the relevant RFC’s and drafts. I’ve included links to the key IETF working groups at the end of this post. Once we’ve understood how the protocols work together to deliver IP Multicast, then in subsequent articles we’ll be able to go into more detail about each of the protocols. In this article, we’ll examine the various protocols used for IP Multicast, and the roles played by each protocol. I’ve been talking about doing some articles about IP Multicast for a while.
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