Date: Tue, 7 Aug 2012 11:37:35 -0400 From: Jason Hellenthal <jhellenthal@dataix.net> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: "net@freebsd.org" <net@freebsd.org> Subject: Re: Send traffic to itself using real NIC Message-ID: <20120807153735.GA98926@DataIX.net> In-Reply-To: <50211DF0.2090607@rdtc.ru> References: <50211DF0.2090607@rdtc.ru>
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--5vNYLRcllDrimb99 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Aug 07, 2012 at 08:53:52PM +0700, Eugene Grosbein wrote: > Hi! >=20 > I'd like to run some stability tests for some L2-transparent > gigabit ethernet network hardware I've got. >=20 > I have one spare FreeBSD 9.1-PRERELEASE with two-ports igb(4) card > and connected both ports using my L2 hardward making a loop. >=20 > Is it possible to configure FreeBSD in such way so it would send > IP traffic for itself not via loopback interface but via igb0/igb1? >=20 > I've tried to utilize multiple FIBs: >=20 > sysctl net.add_addr_allfibs=3D0 > ifconfig igb0 inet 10.0.0.1/24 mtu 9126 > ifconfig igb1 inet 10.0.1.1/24 mtu 9126 > setfib 1 route -q flush > setfib 1 route add 10.0.1.1/32 -iface igb1 > setfib 2 route -q flush > setfib 2 route add 10.0.0.1/32 -iface igb0 >=20 > But "setfib 1 ping -S 10.0.0.1 10.0.1.1" still runs via lo0 (and has no a= nswer). >=20 > The only way I've got working is unidirectional stream of packets > generated with ng_source(4) (patched due to kern/120304) that shows me 10= % packet loss > (using netstat -I to see how many packets got through). >=20 > I would really like using normal TCP/UDP/ICMP streams in addition of ng_s= ource tests. >=20 You could just throw a loopback plug in your adapter. All traffic going out is going to come right back in as fast as its sent out. Another alternative is a crossover cable from igb0 -> igb1. --=20 - (2^(N-1)) JJH48-ARIN --5vNYLRcllDrimb99 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJQITY/AAoJEBSh2Dr1DU7WwXMIAKIeNukM9Mt2U9W3SOpmEWAb x+txwu3KGZaDaWr4EENC/hSdlQnELNQ1YisnJjT83mWz8Pk4pclYcNYY86mDaTeP Ubd/2ADTxLUkXK82r/cEOxjD2SywfjFFCjLay7Q0K2Ne/aO6LpMCB24Ebn38ngbE 4XsxeJjpQVSxiAxpui6rAA/ybJSRTMdjQeeEu9ywFZ9XuYWXa3U2UZB5yMZTyr7q M7bwWlG60m6cps1ADNOaUutIK9iIeRlL+fpYUU1lkWhtbUgi67FeIZ39/a7Dry/Q Pi2/hB/92MG7mGfzhkBW2JyWFG3l10EQKknNE7NrsmuNMQaPS7qkpcfCcyuoCUk= =nkdG -----END PGP SIGNATURE----- --5vNYLRcllDrimb99--
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