[ovs-discuss] SFC using OVN

Ben Pfaff blp at nicira.com
Tue Nov 3 19:57:46 UTC 2015


On Tue, Oct 27, 2015 at 01:14:42AM -0500, V_Dham at Dell.com wrote:
> I am currently exploring Service Function Chaining (SFC)
> implementation using OVN and would like to hear thoughts from the
> community.
> 
> Has anyone implemented Service Function Chaining using OVN project and
> would be willing to share his/her experiences? There are proposals for
> adding NSH header as well as leveraging MPLS headers (interim solution
> for lack of NSH support) for SFC but can someone more experienced in
> this topic share if those modifications are really necessary for real
> world SFC use cases?
> 
> With the native support for L2 overlays and ACLs inherently built into
> OVN, I am wondering if we are better off creating point to point
> overlay networks between the VNFs and using ACLs for traffic
> classification. Or is there more to it than that?

Justin, Russell, Thomas, and I brainstormed together about SFC a bit in
Tokyo.  There was a brief discussion related to the topic on the
openstack-dev list last week as well (see the thread
"[neutron][networking-sfc] API clarification questions").  Thomas built
a strawman prototype, I believe, though as I understand it the
conversation on openstack-dev meant that it implemented an inadequate
model.

I don't know what the immediate plans are, but I expect that there'll be
a place for SFC in OVN.



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