multicast not happy ?

Marko Zec zec at icir.org
Fri Jun 15 22:32:40 UTC 2007


On Saturday 16 June 2007 00:06:12 John Merryweather Cooper wrote:
> Poul-Henning Kamp wrote:
> > In message <46730545.8050005 at yahoo.com>, John Merryweather Cooper 
writes:
> >>> Any ideas ?
> >>
> >> # /sbin/route add -static -net 224.0.0.0 -netmask 240.0.0.0 -iface
> >> sis[1|2]
> >>
> >> I had to do this so my OpenSlp would work.
> >
> > I just got to about the same conclusion, only I used:
> >
> > 	route add -net 224.0.0.0/4 127.0.0.1
> >
> > I'd say this is a bug...
>
> I got the idea from a web page with the instructions for setting up
> OpenSlp on Linux.  I note that mDNS seems to need this too.  To me,
> it makes sense because you need an interface to actually receive/send
> multicast on--and that's what 224.0.0.0/4 is for.

An explicit route to send multicast packets wasn't needed in 4.x days - 
having an interface join the target mcast group was enough.

Marko


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