Re: [netext] LMA initiated flow mobility scenario in I-D draft-bernardos-netext-pmipv6-flowmob

Stefano Faccin <sfaccin@rim.com> Tue, 16 August 2011 18:13 UTC

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From: Stefano Faccin <sfaccin@rim.com>
To: "Basavaraj.Patil@nokia.com" <Basavaraj.Patil@nokia.com>, "netext@ietf.org" <netext@ietf.org>
Thread-Topic: [netext] LMA initiated flow mobility scenario in I-D draft-bernardos-netext-pmipv6-flowmob
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Date: Tue, 16 Aug 2011 18:14:35 +0000
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Subject: Re: [netext] LMA initiated flow mobility scenario in I-D draft-bernardos-netext-pmipv6-flowmob
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Raj,
This sounds like a sensible approach and I fully support it.
Cheers,
Stefano Faccin

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-----Original Message-----
From: netext-bounces@ietf.org [mailto:netext-bounces@ietf.org] On Behalf Of Basavaraj.Patil@nokia.com
Sent: Tuesday, August 16, 2011 8:17 AM
To: netext@ietf.org
Subject: [netext] LMA initiated flow mobility scenario in I-D draft-bernardos-netext-pmipv6-flowmob


Hello,

One of the issues that has been raised (by Julien) is about the capability
that allows an LMA to initiate flow switching.
The I-D states:
"
   A second possible scenario is the following.  A multi-interfaced
   mobile node is attached to a PMIPv6-Domain and the LMA, at a given
   moment, decides to move a flow.  The LMA can decide to move a flow as
   a result of a policy change or upon receiving a trigger either based
   on network status or based on an event detected at the mobile node
   and transported via old or new MAG.  How this decision is taken is
   out of scope of this specification.

"

One of the possible consequences of such an action would be packets being
sent into a void because the MN may be no longer attached to that MAG
through the specific interface. There has not been a good solution that
has been presented to the WG. This issue has been considered as being a
fundamental flaw.

In view of the criticality of this flaw, I would recommend that the LMA
initiated flow mobility capability be removed from the I-D prior to it
being accepted as the WG doc. If WG members feel strongly about having
this feature, it can be included at a later time when a reasonable
solution to address the above concern has been presented and accepted.

-Raj

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