Date: Mon, 25 Mar 1996 12:12:12 +1030 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: andrew@whine.com (Andrew Herdman) Cc: louie@TransSys.COM, taob@io.org, freebsd-hackers@FreeBSD.org Subject: Re: Changing Ethernet frame size to 576 bytes? Message-ID: <199603250142.MAA26791@genesis.atrad.adelaide.edu.au> In-Reply-To: <Pine.BSF.3.91.960324192723.850A-100000@why> from "Andrew Herdman" at Mar 24, 96 07:30:34 pm
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Andrew Herdman stands accused of saying: > > Actually Brian is having a fragment problem, this is from the IRC server > machine which I run the IRC server on: > > ip: > 44034396 total packets received ... > 245769 fragments received ... > 1886 fragments dropped after timeout > 39671 packets reassembled ok ... > Quite a bit really, perhaps Brian should drop it down to 1006. On my > workstation at work I get the following, although not much traffic has > occured since the last boot: Um. Some math : (245769-1186)/39761 ~= 6 fragments/packet (average). For the worst case, where all but one fragment is lost every time, we have 1886/44034396 or 0.004% of the total received packet count lost due to fragment loss. Looking at it from a different angle, 39671/44034393 gives us 0.09% of received packets were fragmented. I'd be rather inclined to call these numbers "marginal", unless you could link them to a specific host or route somewhere, in which case I'd call them "Someone Else's Problem" 8) > Andrew -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[
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