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Date: Wed, 24 Jun 2009 21:32:12 -0700 (PDT) From: david@...g.hm To: Herbert Xu <herbert@...dor.apana.org.au> cc: alex@...riz.org.uk, linux-kernel@...r.kernel.org Subject: Re: When does Linux drop UDP packets? On Wed, 24 Jun 2009, Herbert Xu wrote: > david@...g.hm wrote: >> >> there is only a difference between multicast and broadcast traffic if you >> are spanning subnets. > > Which is always the case if you invest in some intelligent switches. given that each subnet will be a minimum of 4 IP addresses (the network address, two useable, and thr broadcast address), putting each machine on it's own subnet and routing between them on the switch would be very wasteful of addresses. if you use larger subnets, your switch still has the ability to filter things out when they move from port to port, but broadcasts (unless you filter them) still cover the entire subnet. so No, buying intelligent switches doesn't mean that you are always spanning subnets. David Lang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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