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SubjectRe: anyone ever done multicast AF_UNIX sockets?
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alan@lxorguk.ukuu.org.uk said:
> On Mon, 2003-03-03 at 00:05, Michael Richardson wrote:
> > First, multicast doesn't really work on loopback. I don't recall
> > why... One symptom of this is that one can't use the multicast transport
> > for User-Mode-Linux when not "online" (i.e. on the train).
>
> You have to specify you want your multicast packet looped back. By
> default multicasts dont loop

Well, that problem is actually that lo and dummy interfaces don't support
multicast. You need something like an eth device for multicast, even if you're
nowhere near a LAN.

Jeff

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