[c-nsp] Need help with setting up ip multicastrouting

[Gert Doering]

Hi,

On Tue, Oct 12, 2010 at 07:45:10PM +0200, Peter Rathlev wrote:
> I don't know much about multicast, but aren't routed multicast packets
> sent as L2 unicast between multicast routers? 

No.

> I'm just guessing here,
> but I don't see why routed multicast traffic would need to have the L2
> group bit set.

Well, if you only ever have two routers in a subnet, it doesn't need
to...

But what if you have 20 routers in a subnet and want the multicast traffic
to be heard by only those 5 that are interested in it?

gert
-- 
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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