[Openstack] Neutron support for passthrough of networking devices?

Jiang, Yunhong yunhong.jiang at intel.com
Wed Oct 9 23:16:43 UTC 2013

Several thing in my mind:
a) NIC need more information like the switch, and these information need be managed by nova also. We have basic support, but not fully implemented.
b) How to setup the device, including the mac address or 802.1Qbh etc. Libvirt have several option to support it, need more work to support them, also need consider other virt driver like xenapi etc.
c) How to achieve the isolation of tenants, and how to setup like the router in Neutron. I'm not well on Neutron, but I think others may have more idea on it.


> -----Original Message-----
> From: Chris Friesen [mailto:chris.friesen at windriver.com]
> Sent: Wednesday, October 09, 2013 11:53 AM
> To: openstack at lists.openstack.org
> Subject: Re: [Openstack] Neutron support for passthrough of networking
> devices?
> On 10/09/2013 12:31 PM, Jiang, Yunhong wrote:
> > When we worked on H release, we target for basic PCI support like
> > accelerator card or encryption card etc. I think SR-IOV network
> > support is more complex and requires more effort, in both Nova side
> > and Neutron side. We are working on some enhancement in Nova side
> > now. But the whole picture may need more time/discussion.
> Can you elaborate on the complexities?  Assuming you enable SR-IOV on
> the host, and pass it through to the guest using the normal PCI
> passthrough mechanisms, what's the extra complexity?
> Do we run into the same complexity if we have spare physical NICs on the
> host that get passed in to the guest?
> Thanks,
> Chris
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