Date: Mon, 17 Aug 2009 10:25:20 -0700 From: Chuck Swiger <cswiger@mac.com> To: mike@magicislandtechnologies.com Cc: freebsd-ipfw@freebsd.org Subject: Re: out xmit (demux) pipe bw accounting Message-ID: <F8A438EB-5A73-4E52-AC35-DE1BD5476F1A@mac.com> In-Reply-To: <4A8969FF.2070601@magicislandtechnologies.com> References: <4A8969FF.2070601@magicislandtechnologies.com>
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Hi-- On Aug 17, 2009, at 7:32 AM, Michael Spratt wrote: > Could not find answer to following question. > > Given : > # pipe 1 config bw 1Mbit/sec > # ipfw 1000 add pipe 1 ip from any to any out xmit em0 > > Will the bandwidth limit include layer 2 Ethernet headers or will > only the IP datagram itself be included in the accounting mechanism? IPFW normally processes traffic at layer-3, but you can toggle net.link.ether.ipfw sysctl to on, in which case the above rule would also be run against layer-2 packets including the 802.3 ethernet header. See the diagram in "PACKET FLOW" of "man ipfw".... Regards, -- -Chuck
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