Looks a good slide set - where is it linked from? On Thu, May 3, 2018 at 7:40 AM, Jaime Caamaño Ruiz <[email protected]> wrote:
> Oops, I wanted to write "The slide is probably a bit oudated" > > Jaime > > > -----Original Message----- > From: Jaime Caamaño Ruiz <[email protected]> > Reply-To: [email protected] > To: Vinayak Joshi <[email protected]>, sfc- > [email protected] <[email protected]>, jcaamano@s > use.de > Subject: Re: [sfc-dev] Question on OF pipeline > Date: Thu, 03 May 2018 16:36:41 +0200 > > Hello Vinayak > > The slide is probably a bit updated. > > > Doesn’t this cause a packet loop? > > Classifier service index is higher than SFC service index, so this > can't happen. > We also set a magic value in NSH C1 on ingress classifier, and egress > classifier only acts when this magic value is present. > > > Isn’t this incorrect, packet with NSH should always be forwarded by > > SFC > > services? > > The packet is intercepted and forwarded by the egress SFC classifier > service, to the first SFF. Nevertheless, the egress SFC classifier > needs to know which is the final destination (lport) of the packet, and > thats determined by the remaining ingress services so thats the reason > why the packet is resubmitted to the dispatcher by the ingress SFC > classifier service. > > BR > Jaime. > > -----Original Message----- > From: Vinayak Joshi <[email protected]> > To: [email protected] <[email protected]>, jc > [email protected] > Subject: [sfc-dev] Question on OF pipeline > Date: Thu, 3 May 2018 10:28:00 +0000 > > Hi, > > I have a few questions on the OF pipeline described in Slide 1 at https > ://docs.google.com/presentation/d/1gN8GnpVGwku4mp1on7EBZiE41RI7lZ- > FFmFS2QlUTKk/edit#slide=id.g210ac90bb8_0_78. > Sorry for the long mail. > > Please point out if the scenarios/my packet flows are incorrect. > > Say a regular packet arrives at br-int1 on port P1 from VM1 (i.e. VM1 > is not an SF). > Say the SFC Classifier (ingress) matches ACL ant it stamps NSH into the > packet and resubmits to the ingress-dispatcher. > Now there are two possible scenarios: > Port P1 also has SFC service enabled on it. > i. Packet gets > into Ingress SFC service which sends the packet to egress dispatcher > table. > ii. Egress SFC > Classifier acts on it. Since the packet has NSH and if the fist SFF is > on the same br-int the packet is given packet to Ingress SFC. This is > as per- > > > iii. Question: > Doesn’t this cause a packet loop? > Port P1 does not have SFC service enabled on it. > i. In this case > a packet with NSH would be given to some other service (say L3) which > for forward packet to final destination with NSH. > ii. Question: > Isn’t this incorrect, packet with NSH should always be forwarded by SFC > services? > > Thanks in advance, > Vinayak > > _______________________________________________ > sfc-dev mailing list > [email protected] > https://lists.opendaylight.org/mailman/listinfo/sfc-dev > _______________________________________________ > sfc-dev mailing list > [email protected] > https://lists.opendaylight.org/mailman/listinfo/sfc-dev > _______________________________________________ > sfc-dev mailing list > [email protected] > https://lists.opendaylight.org/mailman/listinfo/sfc-dev >
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