John McDowall <jmcdow...@paloaltonetworks.com> wrote on 07/17/2016 08:18:48 PM:
> From: John McDowall <jmcdow...@paloaltonetworks.com> > To: Ryan Moats/Omaha/IBM@IBMUS > Cc: "dev@openvswitch.org" <dev@openvswitch.org> > Date: 07/17/2016 08:18 PM > Subject: Re: SFC: How about stages in both pipelines? > > Ryan, > > I assume you are thinking about L3 VNF support? > > If so yes I need to think this through – any ideas would be appreciated > > Regards > > John > > From: Ryan Moats <rmo...@us.ibm.com> > Date: Sunday, July 17, 2016 at 6:15 PM > To: John McDowall <jmcdow...@paloaltonetworks.com> > Cc: "dev@openvswitch.org" <dev@openvswitch.org> > Subject: SFC: How about stages in both pipelines? > > John- > > To date, I think we've talked about adding an > SFC stage to the ingress pipeline for logical > switch datapaths and how to enable that via > OpenStack/Neutron. Since OVN doesn't have to > assume OpenStack as the CMS, I think we should > also be adding that stage to the ingress > pipeline of the logical router datapath. > > > Ryan I don't think I'm talking about L3 VNF support (at least not that way I've heard the term used previously). Rather, I'm thinking of how I might support VNFs that work at network edges or boundaries (for example, an IDS/IPS for traffic from the Internet). Since such VNFs would be looking at inter-network traffic only, I don't think it makes since to shoehorn them into the logical datapath associated with a logical switch as that would require making the ACLs more complex to ensure they don't have to handle intra-network traffic. Since inter-network traffic will pass through at least one logical datapath associated with a logical router, I'm thinking adding an SFC stage to the logical router's ingress pipeline would support this scenario fairly cleanly at the OVN level. I admit that I've no ideas yet on how to set up networking-sfc to support such a scenario, but that doesn't mean we can't add the code to OVN to support it. Ryan _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
