From: "Kyle Mestery (kmestery)" <kmest...@cisco.com> To: Maryam Hanfi <maryam.ha...@xflowresearch.com> Cc: "<discuss@openvswitch.org>" <discuss@openvswitch.org> Date: Fri, 14 Dec 2012 14:59:36 +0000 Subject: Re: [ovs-discuss] GTPv1-U in OVS On Dec 13, 2012, at 11:35 PM, Maryam Hanfi <maryam.ha...@xflowresearch.com> wrote: > > > >Hi All, > > I want to implement GTPv1-U in Open vSwitch. OVS expects inner MAC header after tunnel header. But GTPv1-U expects IP header after GTPv1-U header. Is there > > >any way to modify the OVS tunneling so inner MAC not required anymore? Does tunneling work without inner MAC header? > > > > >There is a thread on the dev list recently where we are discussing this very thing. See here: > >http://openvswitch.org/pipermail/dev/2012-December/023711.html > >We are looking at implementing LISP which has the same >requirement as GTPv1-U. From what Jesse has indicated, this is a >large amount of work at this point. We >would be happy to ?>collaborate with you on these changes however. Unicast me if this >is something you'd like to pursue.
Hey Kyle, I have a suggestion after looking at this patch. In this patch the pre_tunnel work is being tied to the port_ops which makes sense but in most of such cases the pre-tunnel work would depend on the flow itself rather then being associated with the port. Which means that a better hook would be, to allow an interface of this pre_tunneling code to the previous layer of action execution/flow match. e.g a use-case can be, that the pre_tunnel work depends on the nw_dst of the packets. What are you thoughts on this? -- Regards, -Ahmed Talha Khan
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