Date: Fri, 29 Jun 2001 10:19:33 -0700 From: "matt" <matt-l@pacbell.net> To: "Clark Gaylord" <cgaylord@vt.edu>, <freebsd-net@freebsd.org> Subject: Re: fastforwarding? Message-ID: <004801c100bf$c35d9c10$6503c23f@XGforce.com> References: <GPEOJKGHAMKFIOMAGMDICEOJDGAA.deepak@ai.net><20010626093545.D49992@sunbay.com> <3B3AB4F8.184A2EFE@softweyr.com> <20010629075815.N55750@e028121.vtacs.vt.edu>
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So look like the fastforward is done at the either input/output? the so called layer 2? ====================================== WWW.XGFORCE.COM The Next Generation Load Balance and Fail Safe Server Clustering Software for the Internet. ====================================== ----- Original Message ----- From: Clark Gaylord <cgaylord@vt.edu> To: <freebsd-net@freebsd.org> Sent: Friday, June 29, 2001 4:58 AM Subject: Re: fastforwarding? > On Wed, Jun 27, 2001 at 10:39:20PM -0600, Wes Peters wrote: > > Ruslan Ermilov wrote: > > > On Mon, Jun 25, 2001 at 06:47:41PM -0400, Deepak Jain wrote: > > > > ... > > > > What does the fastforwarding option do that the normal forwarding option > > > > doesn't? > > > > > > > See inet(4). > > > > 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 > > directly from one layer2 input routine directly to the opposing > > layer2 output routine without traversing the IP layer. > > I notice the man page points out that this prevents the use of > ipfilter, etc. The first packet(s?) do get forwarded by the usual > process (yes?), so does this imply that at least a "deny X" would > still work (as the first packet would get denied and hence the > cache does not get populated)? What are the limitations to ipfw > and friends working right in conjunction with fastforwarding? > > Clark > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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