Date: Tue, 19 May 1998 07:45:39 -0700 From: David Greenman <dg@root.com> To: Eivind Eklund <eivind@yes.no> Cc: current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/conf files src/sys/net if_ethersubr.c if_fddisubr.c if_ppp.c src/sys/netinet ip_flow.c in.h in_var.h ip_fw.c ip_input.c ip_var.h Message-ID: <199805191445.HAA22203@implode.root.com> In-Reply-To: Your message of "Tue, 19 May 1998 16:37:34 %2B0200." <19980519163734.18175@follo.net>
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>> This is a standard part of FreeBSD, but must be enabled with: >> "sysctl -w net.inet.ip.fastforwarding=1" ...and of course forwarding must > >Why is this? What are the downsides - just that it is temporary code? Because there are several cases where using this might be bad. One of them I mentioned in the commit message - it will have bad behavior if the number of active paths is greater than IPFLOW_MAX (currently 256). It may also interact badly with route changes, although it has code in it to avoid this. Finally, I still consider it somewhat experimental - I don't currently have the hardware resources to give it a thorough shakeout. There is also plenty of room for further optimization, however I intend to discuss this in a different forum (probably freebsd-net). -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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