Hi guys, In the draft, it says: Each network device receives the Path Tracking packet from its upstream device, makes a copy of it and passes the copy to its CPU.
That means the OAM packet will have different data path with the normal packet. The normal packet will not have "copy" action in the datapath. Then how could the OAM packet detect the liveness of the datapath? Did I missed something? Regards Lizhong > -----Original Message----- > From: Tom Herbert [mailto:[email protected]] > Sent: 2015年6月29日 23:37 > To: Deepak Kumar (dekumar) > Cc: [email protected]; Dapeng Liu > Subject: Re: [nvo3] New draft: Path Detection in VXLAN Overlay Network > > On Mon, Jun 29, 2015 at 6:48 AM, Deepak Kumar (dekumar) > <[email protected]> wrote: > > Hi Dapeng Liu, > > > > I support idea of hardware and controller based Path detection and > > tracking where whole network is OAM capable and packet keeps forwarding > in hardware. > > I believe you guys presented this solution in ONS summit also. > > You should explicitly call out in draft that this solution is not > > backward compatible and all switches require to be OAM capable in > > hardware to look at new bit to punt and copy the packet even in underlay. > > > VXLAN-GPE already defines an OAM bit. If all the hardware needs to be > updated anyway, why not just move to that and avoid having to worry about > the compatibility problem? > > Thanks, > Tom > > > Thanks, > > Deepak > > > > From: Dapeng Liu <[email protected]> > > Date: Saturday, June 20, 2015 at 10:04 AM > > To: <[email protected]> > > Subject: [nvo3] New draft: Path Detection in VXLAN Overlay Network > > > > Hello all, > > > > We have submitted a draft for path detection in VXLAN overlay network. > > http://datatracker.ietf.org/doc/draft-pang-nvo3-vxlan-path-detection/ > > > > The draft proposes a method for path detection in VXLAN network and it > > defines the path detection packet format by using one reserve bit in > > the VXLAN header. > > > > Comments & suggestions are welcomed. > > > > > > -- > > Dapeng Liu > > > > > > _______________________________________________ > > nvo3 mailing list > > [email protected] > > https://www.ietf.org/mailman/listinfo/nvo3 > > > _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
