Date: Thu, 3 Feb 2000 15:25:32 -0500 (EST) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: "Matthew N. Dodd" <winter@jurai.net> Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, "Pedro J. Lobo" <pjlobo@euitt.upm.es>, freebsd-net@FreeBSD.ORG Subject: Re: 802.1Q VLANs Message-ID: <200002032025.PAA63379@khavrinen.lcs.mit.edu> In-Reply-To: <Pine.BSF.4.21.0002031454550.479-100000@sasami.jurai.net> References: <200002031847.NAA62013@khavrinen.lcs.mit.edu> <Pine.BSF.4.21.0002031454550.479-100000@sasami.jurai.net>
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<<On Thu, 3 Feb 2000 15:04:29 -0500 (EST), "Matthew N. Dodd" <winter@jurai.net> said: > Humm... Isn't this going to confuse BPF when its receiving normal > ethernet headers? No. If it's listening on the vlan interface, it will get the decapsulated packets. If it's listening on the master interface, it will get everything. tcpdump, at least, understands (or can easily be made to understand) 802.1Q tagging. The libpcap filter compiler doesn't actually know about 802.1Q, but it doesn't know about ifi_hdrlen either! This is important as a debugging facility. > I'm not sure we want to have the drivers always accept large > packets, just because we've compiled a kernel with VLAN devices in it. Not because we've compiled a kernel with VLAN devices in it; because we've compiled a kernel with a NIC driver that supports large packets. -GAWollman To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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