Date: Thu, 22 Jan 2004 11:13:49 +0200 From: Ruslan Ermilov <ru@freebsd.org> To: Richard Bejtlich <richard_bejtlich@yahoo.com> Cc: freebsd-security@freebsd.org Subject: Re: interface bonding Message-ID: <20040122091349.GF21710@FreeBSD.org.ua> In-Reply-To: <20040121213833.57935.qmail@web60809.mail.yahoo.com> References: <20040121213833.57935.qmail@web60809.mail.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
--lHGcFxmlz1yfXmOs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jan 21, 2004 at 01:38:33PM -0800, Richard Bejtlich wrote: > Hello, >=20 > On 9 Jan 04 I posted a method for bonding interfaces > using netgraph for purposes of sniffing tap outputs as > a single virtual interface. Unfortunately, the method > I posted creates two copies of every packet. >=20 > I have used the following to successfully collect only > one copy of packets sent from the two TX streams of a > network tap: >=20 > #!/bin/sh > # sf2 and sf3 are real interfaces which receive tap=20 > # outputs; ngeth0 is created by ngctl >=20 > # ng_ether must be loaded so netgraph can "see" the=20 > # real interfaces sf2 and sf3 > kldload ng_ether >=20 > # bring up the real interfaces > ifconfig sf2 promisc -arp up > ifconfig sf3 promisc -arp up >=20 > # create ngeth0 and bind sf2 and sf3 to it > ngctl mkpeer . eiface hook ether > ngctl mkpeer ngeth0: one2many lower one > ngctl connect sf2: ngeth0:lower lower many0 > ngctl connect sf3: ngeth0:lower lower many1 >=20 > # bring up ngeth0 for sniffing duties > ifconfig ngeth0 -arp up >=20 > -- >=20 > Sorry for the confusion earlier. I appreciate any > comments on how to improve this method. Please check > my 9 Jan post to see the setup which created the dual > packets. >=20 This seems to work, too. I believe that duplication you observe with the old method where you've attached ng_eiface node instead of ng_ether node may have to do with a bug I've fixed month ago in src/sys/netgraph/ng_eiface.c,v 1.4.2.6, in RELENG_4. Can you check if using this revision and the old method solves the duplication? Cheers, --=20 Ruslan Ermilov FreeBSD committer ru@FreeBSD.org --lHGcFxmlz1yfXmOs Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAD5RNUkv4P6juNwoRAkaKAKCByeC6VL9LF0KhhkLSpC4Hh1tCSgCffshy vVqP15URBFwSUmkQTp8MPTY= =UWyw -----END PGP SIGNATURE----- --lHGcFxmlz1yfXmOs--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040122091349.GF21710>