Date: Mon, 1 Dec 2003 22:08:15 -0800 From: Jonathan Mini <mini@freebsd.org> To: Robert Watson <rwatson@freebsd.org> Cc: Bruce M Simpson <bms@spc.org> Subject: Re: ifconfig(8) refactoring -- YACC grammar now online Message-ID: <EB097B13-248D-11D8-BEFA-000A95CD3CF8@freebsd.org> In-Reply-To: <Pine.NEB.3.96L.1031130173735.66375g-100000@fledge.watson.org> References: <Pine.NEB.3.96L.1031130173735.66375g-100000@fledge.watson.org>
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On Nov 30, 2003, at 2:41 PM, Robert Watson wrote: > if_tap is actually quite useful, and in the same general class of > synthetic interfaces as if_tun. I've used both in building tunneling > and > topology-manipulation tools, as well as for debugging routing, etc. > if_tap simulates an 802 device, and if_tun simulates a point-to-point > device. VMware is the only application I know of using if_tap, > although I > have a fair amount of my own code that uses it. Userland ppp uses > if_tun, > as to some of the third party crypto tunneling tools. F5 uses if_tap for management traffic, as our internal framework looks a lot more like an 802 environment than a point-to-point link. Both if_tap and if_tun are quite handy, given different types of projects. -- Jonathan Mini mini@freebsd.org http://www.freebsd.org
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