Re: [Mip4] Re: FW: Comments on VPN Problem Statement Draft

[Henrik Levkowetz <henrik@levkowetz.com>]

Hi Gopal,

So you see this scenario as one of the possible problem scenarios we
potentially would need to solve?

	Henrik

Wednesday 27 August 2003, Gopal wrote:
> Farid and Henrik,
> 
> It would make sense to  add the scenario that jayshree was bringing 
> up.   This was what I was bringing up during the initial discussion.
> 
> -Gopal
> 
> 
> At 12:15 PM 8/26/2003 +0200, Henrik Levkowetz wrote:
> >Hi,
> >
> ><co_chair_hat>
> >
> >         I'm picking up this thread and putting it onto the main mip4 list.
> >Please remove the mip-vpn design team list address from future replies.
> >
> >I would like to see this draft sent up to the IESG for consideration
> >ASAP. In case we get (unexpected) pushback, it would be good to get it
> >before the solutions draft is complete...
> >
> >Please respond to Farid's query below, so we can wrap this up. If any
> >other minor adjustments are needed as a result of the WG last call, I'd
> >like them done and an updated draft out soon; at which point we will
> >send it to the ADs. If there are no adjustments to be done, we'll send
> >up the current draft ( -03 ).
> >
> >Let's get's this one shipped, shall we?
> >
> ></co_chair_hat>
> >
> ><wg_member_hat>
> >
> >As Section 2 of the draft explicitly discusses possible placements of HA
> >vs. VPN-GW, and (as we discussed in the design team) the co-location of
> >an FA with the VPN-GW is a possible optimization feature of a solution
> >to the problems posed, rather than a separate problem scenario, my
> >viewpoint is that we should not put this in the problem statement draft.
> >
> >It should be described properly in a vpn-traversal optimization draft,
> >though.
> >
> ></wg_member_hat>
> >
> >         Regards,
> >                 Henrik
> >
> >
> >
> >
> >
> >On Tuesday, 12 Aug 2003, Farid wrote:
> > > Hello All,
> > > What do you think about Jayshree's request to add a new scenario to
> > > the problem statement draft?
> > > BR,
> > > Farid
> > >
> > > -----Original Message-----
> > > From: Jayshree Bharatia [mailto:jayshree@nortelnetworks.com]
> > > Sent: Wednesday, August 06, 2003 12:13 PM
> > > To: Adrangi, Farid
> > > Cc: mip4@ietf.org
> > > Subject: RE: Comments on VPN Problem Statement Draft
> > >
> > > Hello Farid,
> > >
> > > Please see my reply below.
> > >
> > > Thanks,
> > > Jayshree
> > > -----Original Message-----
> > > From: Adrangi, Farid [mailto:farid.adrangi@intel.com]
> > > Sent: Sunday, August 03, 2003 11:50 PM
> > > To: Bharatia, Jayshree [RICH1:2H13:EXCH]
> > > Cc: mip4@ietf.org
> > > Subject: RE: Comments on VPN Problem Statement Draft
> > >
> > >
> > > > Hello Jayshree,
> > > > Thanks for following up on this.  You, Gopal, and I had a very brief
> > > > conversation on this during IETF-57 - but I am not sure if we
> > > > derived any conclusion on whether or not we should include this
> > > > scenario.  To be frank, I don't quite understand the point behind
> > > > adding this scenario because,
> > > > -       It seems to present a solution to a specific deployment
> > > > model rather than a deployment scenario
> > >
> > > [JB] My understanding is different from yours so please elaborate what
> > > you mean by deployment model vs deployment scenario in this particular
> > > context.
> > >
> > > > -       I don't quite see the advantages of  a combined VPN+FA if it
> > > > does not support FA traversal and it does not avoid IPsec
> > > > renegotiation when MN moves from one subnet to another - perhaps you
> > > > can elaborate on this?
> > >
> > > [JB] I think regardless this scenario has any advantages or not, it is
> > > one of the probable scenario which has potential issues (as you have
> > > indicated earlier).
> > >
> > > > -       Furthermore, Scenarios in section 2 of the problem statement
> > > > draft represents combinations of MIPv4 HA and VPN gateway placement
> > > > - adding this scenario is going to change semantics of the section
> > > > 2.
> > >
> > > [JB] I am not sure what you mean by semantics change here. Do you
> > > think documenting this in new subsection (2.6) is a problem?
> > >
> > > > I have no problem adding this scenario to the draft - I just wanted
> > > > to make sure that we clearly understand the reasons for adding this
> > > > scenario to the problem statement draft.  Design team members and
> > > > interested individuals are welcome to express their opinion on this.
> > > >
> > > >
> > > > Best regards,
> > > > Farid
> > >
> > >
> > >
> > >
> > >
> > >  The   following   sub-sections   introduce   five   representative
> > >    combinations of MIPv4 HA and VPN gateway placement.
> > >
> > > -----Original Message-----
> > > From: Jayshree Bharatia [mailto:jayshree@nortelnetworks.com]
> > > Sent: Thursday, July 31, 2003 1:44 PM
> > > To: Adrangi, Farid
> > > Cc: 'mip4@ietf.org'
> > > Subject: RE: Comments on VPN Problem Statement Draft
> > >
> > > Hello Farid,
> > >
> > > As per our earlier discussion during IETF-57, my understanding is that
> > > you will include the scenario of co-existed FA with the VPN gateway in
> > > the VPN Problem Statement draft.
> > >
> > > I agree that this particular scenario has problems and it won't work
> > > if the MN is behind an FA in the foreign subnet. But again, this is a
> > > problem statement draft. Hence, I believe that this is the appropriate
> > > document for
> > > mentioning this scenario.
> > >
> > > Thanks,
> > > Jayshree
> > >
> > > -----Original Message-----
> > > From: Adrangi, Farid [mailto:farid.adrangi@intel.com]
> > > Sent: Monday, April 07, 2003 2:58 PM
> > > To: Bharatia, Jayshree [RICH1:2H13:EXCH]
> > > Cc: 'mobile-ip@sunroof.eng.sun.com'
> > > Subject: RE: Comments on VPN Problem Statement Draft
> > > Hello Jayshree
> > > This is a good point - I knew someone was to bring this up!  At the
> > > time of writing these scenarios, we (the design team) actually
> > > discussed this and concluded this scenario would fall into a solution
> > > space.  Maybe we did not make the right decision and we should rethink
> > > this.  But, before we take this discussion further please allow me to
> > > ask you a few questions about the details of the scenario (VPN+FA)
> > > that you have in mind .  Are you thinking to broadcast FA
> > > advertisements through the IPsec tunnel to the MN?  If so, how will
> > > this work if MN is already behind an FA in the foreign subnet? Or, If
> > > you had something different in mind, perhaps you can elaborate on
> > > that. Best regards,
> > > Farid
> > >
> > >
> > > -----Original Message-----
> > > From: Jayshree Bharatia [mailto:jayshree@nortelnetworks.com],
> > > Sent: Friday, April 04, 2003 3:14 PM
> > > To: 'farid.adrangi@intel.com'
> > > Cc: 'mobile-ip@sunroof.eng.sun.com'
> > > Subject: Comments on VPN Problem Statement Draft
> > >
> > > Hello Farid,
> > > This draft (draft-ietf-mobileip-vpn-problem-statement-req-01)
> > > currently misses one scenario were the FA is co-existed with the VPN
> > > Gateway. I would think that there are no technical issues supporting
> > > this scenario. It will be good if you can add this scenario in the
> > > draft (perhaps as section 2.6?) for completeness.
> > > Thanks,
> > > Jayshree
> > >
> >
> >
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> 
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