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MaxxHeadroom
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Multicast Stream Forwarding

Thu Nov 02, 2017 10:21 pm

Hi all,

I would like to configure a router specifically built to route multicast. There are some articles about PIM and IGMP services here and across the web enough to figure them out. One important aspect of multicast is the constant stream. Constant stream means that the stream keeps coming without any IGMP requests. The articles I have read suggest that constant stream is the opposite of what multicast routing is about. They block multicast unless there is an IGMP request. That being said, I have not been able to figure out how to do constant stream routing of multicast.

Specifically, what I am looking for is encompassed in this example. A router with n ports with addresses 192.168.1.1/24, 192.168.2.1/24 to 192.168.n.1/24. Port 1 is receiving a constant stream of multicast with an address of 226.0.0.226:2222. How would I program this router to always send 226.0.0.226:2222 out of ports 2 and 4?

Thanks for your assistance.
 
pwuk
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Joined: Wed Aug 01, 2012 8:51 pm

Re: Multicast Stream Forwarding

Tue Nov 14, 2017 7:28 pm

So you want to send multicast to subscribers who haven't actually subscribed to it?
 
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docmarius
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Re: Multicast Stream Forwarding

Tue Nov 14, 2017 8:57 pm

The constant streaming idea is referring to stream once the receiving device subscribed to a multicast group. Before that, the stream has no meaning for it and is just consuming bandwidth on that network segment. And of course the multicast source needs to be capable to deliver a constant stream to the multicast router.
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