From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Richard Croucher" Subject: RE: [ewg] IPoIB to Ethernet routing performance Date: Sun, 26 Dec 2010 10:57:13 -0000 Message-ID: <018d01cba4eb$aa507320$fef15960$@com> References: <20101206112454.76bb85f1@frecb012350.frec.bull.fr> <00d701cb9533$71c5f2e0$5551d8a0$@com> <20101206124023.025c2f88@frecb012350.frec.bull.fr> <00f201cb953e$53f66a00$fbe33e00$@com> <20101206140505.20cfc9e2@frecb012350.frec.bull.fr> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Content-Language: en-gb Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: 'Ali Ayoub' , 'Christoph Lameter' Cc: 'linux-rdma' , 'sebastien dugue' , 'OF EWG' List-Id: linux-rdma@vger.kernel.org The vNIC driver only works when you have Ethernet/InfiniBand hardware gateways in your environment. It is useful when you have external hos= ts to communicate with which do not have direct InfiniBand connectivity. IPoIB is still heavily used in these environments to provide TCP/IP connectivity within the InfiniBand fabric. The primary Use Case for vNICs is probably for virtualization servers, = so that individual Guests can be presented with a virtual Ethernet NIC and= do not lead to load any InfiniBand drivers. Only the hypervisor needs to = have the InfiniBand software stack loaded. I've also applied vNICs in the Financial Services arena, for connectivi= ty to external TCP/IP services but there the IPoIB gateway function is arguab= ly more useful. The whole vNIC arena is complicated by different, incompatible implementations from each of Qlogic and Mellanox. Richard -----Original Message----- =46rom: ewg-bounces-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org [mailto:ewg-bounces-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org] On Behalf Of Ali Ayoub Sent: 26 December 2010 07:43 To: Christoph Lameter Cc: linux-rdma; sebastien dugue; Richard Croucher; OF EWG Subject: Re: [ewg] IPoIB to Ethernet routing performance On Thu, Dec 9, 2010 at 3:46 PM, Christoph Lameter wrote: > On Mon, 6 Dec 2010, sebastien dugue wrote: > >> > The Mellanox BridgeX looks a better hardware solution with 12x 10G= e >> > ports but when I tested this they could only provide vNIC >> > functionality and would not commit to adding IPoIB gateway on thei= r >> > roadmap. >> >> =A0 Right, we did some evaluation on it and this was really a show s= topper. > > Did the same thing here came to the same conclusions. May I ask why do you need IPoIB when you have EoIB (vNic driver)? Why it's a show stopper? _______________________________________________ ewg mailing list ewg-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ewg -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html