Date: Sat, 20 Oct 2007 08:41:55 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Len Gross <sandiegobiker@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Disable Exponential Backoff (retry) on Ethernet? Message-ID: <20071019224155.GI20308@server.vk2pj.dyndns.org> In-Reply-To: <27cb3ada0710172051t536a4d11pfdfdb079ebd98932@mail.gmail.com> References: <27cb3ada0710172051t536a4d11pfdfdb079ebd98932@mail.gmail.com>
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--liOOAslEiF7prFVr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Oct 17, 2007 at 08:51:34PM -0700, Len Gross wrote: >I'm doing some protocol development and it is convenient to start it on >Ethernet. I will need to send a packet to the Ethernet device and only ha= ve >it be sent once, even if there is a colision. I know we've still got some hubs lying around in a backroom at work but I don't know of anything that will let you disable the retry-on-CD. Have you considered simulating the network at a slightly higher lever: Use ipfw pipes or similar to simulate packet loss (either set a queue length of 1 or probabilistically). This could be done either as a bridge or by tunneling your protocol over IP or UDP. --=20 Peter --liOOAslEiF7prFVr Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFHGTKz/opHv/APuIcRArusAJ4pMIwKZcAFLFNwyMU3uZfv44JnzACeNiwh nAGneCdvy3oU4yYbp3MTbVI= =/kAs -----END PGP SIGNATURE----- --liOOAslEiF7prFVr--
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