One line comment inline. > -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Liang, Cunming > Sent: Tuesday, October 21, 2014 8:33 PM > To: Alex Markuze > Cc: dev at dpdk.org > Subject: Re: [dpdk-dev] nic loopback > > It?s a pain VF can?t set the register directly. > As kernel ixgbe don?t support to set the value, I?m afraid you have to modify > kernel ixgbe. > If your purpose is mainly for testing purpose. > One option is you can just set the register bit value to full 1 during device > initialization. > Another option is you can choose to use DPDK as host PF. > Running testpmd in host, and set such register by interactive command line. > > Ideally it?s better to add a kind of VF to PF mailbox message. > Host PF delegate VF to enable the local pool loopback. > So during runtime, VF can proactive to enable/disable the ability.
[heqing] Such a proposal has been discussed a few times, but the kernel driver does not accept this due to the security concern. > > > From: Alex Markuze [mailto:alex at weka.io] > Sent: Tuesday, October 21, 2014 11:16 PM > To: Liang, Cunming > Cc: dev at dpdk.org > Subject: Re: [dpdk-dev] nic loopback > > How can I set/query this bit (LLE(PFVMTXSW[n]), intel 82599 ) on ESX, or any > other friendlier environment like Linux? > > On Tue, Oct 21, 2014 at 4:18 AM, Liang, Cunming > <cunming.liang at intel.com<mailto:cunming.liang at intel.com>> wrote: > > > > -----Original Message----- > > From: dev > [mailto:dev-bounces at dpdk.org<mailto:dev-bounces at dpdk.org>] > > On Behalf Of Alex Markuze > > Sent: Tuesday, October 21, 2014 12:24 AM > > To: dev at dpdk.org<mailto:dev at dpdk.org> > > Subject: [dpdk-dev] nic loopback > > > > Hi, > > I'm trying to send packets from an application to it self, meaning > > smac == dmac. > > I'm working with intel 82599 virtual function. But it seems that these > > packets are lost. > > > > Is there a software/hw limitation I'm missing here (some additional > > anti-spoofing)? AFAIK modern NICs with sriov are mini switches so the > > hw loopback should work, at least thats the theory. > > > [Liang, Cunming] You could have a check on register LLE(PFVMTXSW[n]). > Which allow an individual pool to be able to send traffic and have it loopback > to itself. > > > > Thanks.
