Hi,
we really like the idea to address the SFC use-case in Neutron working group.
We would be happy to work with the community to work out the way to consume 
service-chains via standardized neutron-api and provide use-cases and 
blueprints.
Some initial ideas on the use-case can be found in the following etherpad [1].

Keshava, we think that it would be ideal to have two type of use-cases: one 
which you described below (“dynamic” one) with the usage of IETF-defined header 
but also one “static” one where the whole chain can be pre-provisioned by the 
orchestrator via Neutron-API  w/o usage of classifier and header extensions.
[1] https://etherpad.openstack.org/p/kKIqu2ipN6

Kind regards/Mit freundlichen Grüßen
Yuriy Babenko

Von: A, Keshava [mailto:keshav...@hp.com]
Gesendet: Donnerstag, 8. Januar 2015 07:19
An: mest...@mestery.com; OpenStack Development Mailing List (not for usage 
questions)
Betreff: Re: [openstack-dev] [neutron][AdvancedServices] Confusion about the 
solution of the service chaining!

Yes, I agree with Kyle decision.

First we should define what is Service.
Service is within OpenStack infrastructure ? or Service belongs  to NFV 
vNF/Service-VM ?
Based on that its Chaining needs to be defined.
If it is chaining of vNFs(which are service/set of services)  then it  will be 
based on ietf  ‘service header insertion’ at the ingress.
This header will have all the set services  that needs to be executed  across 
vNFV, will be carried in each of the Tennant packet.

So it requires coordinated effort along with NFV/Telco  working groups.

keshava

From: Kyle Mestery [mailto:mest...@mestery.com]
Sent: Wednesday, January 07, 2015 8:25 PM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [neutron][AdvancedServices] Confusion about the 
solution of the service chaining!

On Wed, Jan 7, 2015 at 6:25 AM, 
<lv.erc...@zte.com.cn<mailto:lv.erc...@zte.com.cn>> wrote:
Hi,

I want to confirm that how is the project about "Neutron Services Insertion, 
Chaining, and Steering" going, I found that all the code implementation about 
service insertion、service chaining and traffic steering list in JunoPlan were 
Abandoned .

https://wiki.openstack.org/wiki/Neutron/AdvancedServices/JunoPlan

and I also found that we have a new project about GBP and 
group-based-policy-service-chaining be located at:

https://blueprints.launchpad.net/group-based-policy/+spec/group-based-policy-abstraction

https://blueprints.launchpad.net/group-based-policy/+spec/group-based-policy-service-chaining

so I'm confused with solution of the service chaining.

We are developing the service chaining feature, so we need to know which one is 
the neutron's choice. Are the blueprints about the service insertion, service 
chaining and traffic steering list in JunoPlan all Abandoned ?
Service chaining isn't in the plan for Kilo [1], but I expect it to be 
something we talk about in Vancouver for the Lxxx release. The NFV/Telco group 
has been talking about this as well. I'm hopeful we can combine efforts and 
come up with a coherent service chaining solution that solves a handful of 
useful use cases during Lxxx.

Thanks,
Kyle

[1] 
http://specs.openstack.org/openstack/neutron-specs/priorities/kilo-priorities.html

BR
Alan



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