From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Hutchings Subject: Re: [E1000-devel] discussion questions: SR-IOV, virtualization, and bonding Date: Fri, 3 Aug 2012 18:49:23 +0100 Message-ID: <1344016163.2610.9.camel@bwh-desktop.uk.solarflarecom.com> References: <501AD33E.5090308@genband.com> <17679.1343939453@death.nxdomain> <501AFEAD.10001@genband.com> <501B0037.1010804@genband.com> <20421.1343948491@death.nxdomain> <501B587E.6040703@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Jay Vosburgh , Chris Friesen , "e1000-devel@lists.sourceforge.net" , netdev To: John Fastabend Return-path: Received: from webmail.solarflare.com ([12.187.104.25]:24767 "EHLO ocex02.SolarFlarecom.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751716Ab2HCRta (ORCPT ); Fri, 3 Aug 2012 13:49:30 -0400 In-Reply-To: <501B587E.6040703@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 2012-08-02 at 21:50 -0700, John Fastabend wrote: > On 8/2/2012 4:01 PM, Jay Vosburgh wrote: [...] > > Still, though, isn't "influence the guest's choice" pretty much > > satisified by having the VF interface go carrier down in the guest when > > the host wants it to? Or are you thinking about more fine grained than > > that? > > > > Perhaps one argument against this is if the hardware supports loopback > modes or the edge relay in the hardware is acting like a VEB it may > still be possible to support VF to VF traffic even if the external link > is down. Not sure how useful this is though or if any existing hardware > even supports it. [...] It seems to me that VF to VF traffic ought to still work. If it doesn't then that's an unfortunate regression when moving from software bridging and virtio to hardware-supported network virtualisation. (But hybrid network virtualisation may help to solve that.) Ben. -- Ben Hutchings, Staff Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked.