Re: [vnfpool] Overlap with SFC?

[Zongning <[e-mail]>]

You are more than welcome, Sue. :-)

-Ning

> -----Original Message-----
> From: Susan Hares [mailto:[e-mail]]
> Sent: Wednesday, January 22, 2014 9:15 AM
> To: Zongning; 'King, Daniel'; 'Melinda Shore'; [e-mail]
> Cc: [e-mail]
> Subject: RE: [vnfpool] Overlap with SFC?
> 
> Ning:
> 
> Therefore, some of the mechanisms may be in parallel or serial.  Shall I add
> comments in my use cases to indicate when VNF functions are parallel or
> serial?
> 
> Sue
> 
> -----Original Message-----
> From: vnfpool [mailto:[e-mail]] On Behalf Of Zongning
> Sent: Tuesday, January 21, 2014 7:57 PM
> To: King, Daniel; Melinda Shore; [e-mail]
> Cc: [e-mail]
> Subject: Re: [vnfpool] Overlap with SFC?
> 
> Hi, Dan and Melinda,
> 
> Thanks for your reply.
> 
> Both of you are right in that our proposal here is narrowly focused on
> redundancy mechanism for VNF. This goal is basically complementary to SFC
> charter. Another point I want to add is that vnfpool is not only used in
> "chained service nodes", but applicable to other cases where service nodes
> are not necessarily sequentially connected.
> 
> -Ning
> 
> > -----Original Message-----
> > From: vnfpool [mailto:[e-mail]] On Behalf Of King,
> > Daniel
> > Sent: Wednesday, January 22, 2014 3:24 AM
> > To: Melinda Shore; [e-mail]
> > Cc: [e-mail]
> > Subject: Re: [vnfpool] Overlap with SFC?
> >
> > Hi Again,
> >
> > Thanks Melinda, you are far more succinct than I have been. However,
> > seeing as we may have some additional interest in the vnfpool work, it
> > may be worth summarizing our problem space and some of our discussion
> > thus far for anyone peeking at the list for the first time:
> >
> > A Virtualized Network Function (VNF) (e.g. vBRAS vFirewall,
> > vLoadbalancer) provides the equivalent function as a dedicated
> > hardware platform. These VNF instances are typically instantiated in
> > clusters running on general purpose servers via a variety of
> > virtualization platforms. As per discussions within the SFC Working
> > Group (WG), a user/network service is typically realized by a chain of
> > VNFs (also known as a VNF Forwarding Graph -VNFG)  to deliver function
> > in a deterministic sequence. Whereas SFC WG is tasked with
> > investigating and documenting SFC architecture, and  SFC protocol
> > mechanisms (new or extensions to existing solutions) in order to
> > encapsulate and steer traffic, and convey SFC and Service Function Path
> (SFP) information to function nodes, both virtual and physical.
> >
> > The vnfpool list was initiated to investigate the resilience
> > requirements and solutions  for virtual network functions, running as
> > single, or pools (sets) of VNFs. So clearly some of the vnfpool work
> > may be complimentary to the SFC WG, but I think the majority of work
> > will be in parallel to the SFC WG. Initially this list has scoped the
> > vnfpool work into a problem statement, use cases, architecture and
> > signalling to deploy and manage VNF pool resilience (reliability,
> redundancy, availability, failover), these discussions have included:
> >
> > - Signalling between VNF pools for transition (e.g. state change,
> > scaling, moving) management, notification, backup, performance
> > monitoring and announcements;
> >
> > - Service state management (e.g. synchronizing method, state data
> > format, location and mechanism to access state data);
> >
> > - Obtaining underlying network information (e.g., this is where we
> > expect cooperation with existing working groups - ALTO, I2RS);
> >
> > - Mechanisms for instance deployment reflecting resilience requirements
> (e.g.
> > distribution of instances across different VMs or hypervisors);
> >
> > - Explore and document requirements for reliable transport of traffic
> > and security mechanisms between VNF pools, and reliable and secure
> > control of VNF pools.
> >
> > We have established that for some use cases (Virtualisation of Mobile
> > Core Network and IMS (vEPC & vIMS), Virtualisation of the Home
> > Environment (vHome), Virtualisation of Content Distribution Network
> > (vCDN)) there will also be specific resilience requirements, when
> > relevant to the SFC WG, i.e., traffic steering between (virtual)
> > network function nodes, these application specific requirements may
> > require co-operation (via requirements or problem statement I-Ds between
> vnfpool and SFC WG).
> >
> > Br, Dan.
> >
> > -----Original Message-----
> > From: vnfpool [mailto:[e-mail]] On Behalf Of Melinda
> > Shore
> > Sent: 21 January 2014 18:39
> > To: [e-mail]
> > Cc: [e-mail]
> > Subject: Re: [vnfpool] Overlap with SFC?
> >
> > Hi, Adrian:
> >
> > The vnfpool proposal is quite narrowly focused on redundancy
> > mechanisms for virtualized network functions.
> >
> > Melinda
> >
> >
> > --
> > Melinda Shore
> > No Mountain Software
> > [e-mail]
> >
> > "Software longa, hardware brevis."
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