Date: 19 Aug 2005 08:57:16 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: freebsd.ml@gmail.com Cc: questions <freebsd-questions@freebsd.org> Subject: Re: gif tunnel overhead Message-ID: <448xyyhyoj.fsf@be-well.ilk.org> In-Reply-To: <ded8d717050817184875296eba@mail.gmail.com> References: <ded8d717050817184875296eba@mail.gmail.com>
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FreeBSD MailingLists <freebsd.ml@gmail.com> writes: > about how much (what percent) bandwidth overhead should I expect if I > connect two hosts using a UNENCRYPTED gif tunnel over a 2Mbps > connection? It depends on the kind of packets you're sending. As a corollary to that, the overhead will probably *not* be symmetrical (in both directions). It also depends on how the tunnel is configured. For maximum-size regular Ethernet packets with IPv4 over IPv4, figure a couple of percent of overhead; for minimum-size IP packets, it will be over 30%. The latter case probably isn't a problem, though, because it's unusual to fill a symmetrical-bandwidth link with minimum-size packets.
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