Date: Fri, 29 Jun 2001 08:09:39 -0400 From: Mike Tancsa <mike@sentex.net> To: des@ofug.org (Dag-Erling Smorgrav) Cc: freebsd-net@freebsd.org Subject: Re: fastforwarding? Message-ID: <srrojtgtncn98df6bkt3sl61596ffnronu@4ax.com> In-Reply-To: <SEN.993760413.103708646@news.sentex.net> References: <GPEOJKGHAMKFIOMAGMDICEOJDGAA.deepak@ai.net> <20010626093545.D49992@sunbay.com> <3B3AB4F8.184A2EFE@softweyr.com> <SEN.993760413.103708646@news.sentex.net>
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On 28 Jun 2001 16:33:33 -0400, in sentex.lists.freebsd.net you wrote: >Wes Peters <wes@softweyr.com> writes: >> The description there isn't very forthcoming. fastforwarding caches >> the results of a route lookup for destination addresses that are not >> on the local machine, and uses the cached route to short-circuit the >> normal (relatively slow) route lookup process. The packet flows=20 >> directly from one layer2 input routine directly to the opposing=20 >> layer2 output routine without traversing the IP layer. > >And more importantly, without traversing ipfw or ipfilter. In other >words, don't use this on a firewall. Are there any other caveats ? I seem to recall from way back something about this (or maybe I am thinking of something else) being count sensitive. e.g. that over x amount of routes, its not worth it to enable. ---Mike Mike Tancsa (mdtancsa@sentex.net) =09 Sentex Communications Corp, =09 Waterloo, Ontario, Canada "Given enough time, 100 monkeys on 100 routers=20 could setup a national IP network." (KDW2) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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