Re: WGLC #2 for draft-ietf-dmm-ondemand-mobility-05

Hi,

Thanks for the support.

I agree with your comment; the text might be misleading.
The general principle is to maintain the old behavior (prior to OnDemand support) when one entity is  legacy. According to this principle, if a legacy application is executed, it should experience the same behavior as if it would have been executed with a legacy IP stack and legacy network. The problem is however, that the behavior of the network in terms of IP address type allocation is not define.

So I am thinking of changing the text from C
"New IP stacks must continue to support all legacy operations. If an
application does not use On-Demand Mobility feature, the IP stack
must respond in a legacy manner.

If the network infrastructure supports On-Demand Mobility feature,
the IP stack may still request specific types of source IP address
transparently to legacy applications. This may be useful for
environments in which both legacy and new applications are executed.

The definition of what type of addresses to request and how they are
assigned to legacy applications are outside of the scope of this
specification."

To (the red text is new, the strikethrough text will be deleted)C
" New IP stacks must continue to support all legacy operations. If an
application does not use On-Demand Mobility feature, the IP stack
must respond in a legacy manner.

If the network infrastructure supports On-Demand Mobility feature,
the IP stack should act according to the application request: If the
application requests a specific address type, the stack should forward
this request to the network. If the application does not request a specific
address type, the IP stack must not request an address type and leave
it to the network's default behavior to choose the type of the allocated
IP address. If an address was already allocated to the host, the IP stack
should use this address and not request a new one from the network.
may still request specific types of source IP address
transparently to legacy applications. This may be useful for
environments in which both legacy and new applications are executed.

The definition of what type of addresses to request and how they are
assigned to legacy applications are outside of the scope of this
specification."

Is that OK?

Thanks,
                /Danny

-----Original Message-----
From: dmm [mailto:[email protected]] On Behalf Of Seil Jeon
Sent: Tuesday, June 21, 2016 12:52
To: [email protected]
Cc: '"刘大鹏(鹏成)"'
Subject: Re: [DMM] WGLC #2 for draft-ietf-dmm-ondemand-mobility-05

Hi,

I have read and checked the updates in -03 version.
And I support this draft to move forward, if the following is clearly resolved.


"4.2. IP Stack in the Mobile Host

...


If the network infrastructure supports On-Demand Mobility feature, the IP stack may still request specific types of source IP address  transparently to legacy applications."


As this draft is based on the application-driven API selection idea, if no explicit request is given by an application, the type should be selected by default, though the default behavior could be regulated by the network operator. My comment is putting "based on a default havior" in a proper place in the sentence would be exact, leaving no misunderstanding as if the IP stack has the selection capability of source IP address type, instead of the application.

One minor comment is [I-D.ietf-dmm-requirements] in the reference should be replaced by RFC7333.


Regards,
Seil Jeon


-----Original Message-----
From: dmm [mailto:[email protected]] On Behalf Of Jouni
Sent: Thursday, June 16, 2016 2:16 AM
To: [email protected]<mailto:[email protected]>
Cc: "刘大鹏(鹏成)"
Subject: [DMM] WGLC #2 for draft-ietf-dmm-ondemand-mobility-05

Folks,

This email starts the WGLC #2 for draft-ietf-dmm-ondemand-mobility-05. Post your comment to the mailing list and also add your issues/correction requests/concerns etc into the Issue Tracker.

   WGLC #2 Starts: 6/15/2016
   WGLC #2 Ends: 6/29/2016 EOB PDT

Regards,
   Jouni & Dapeng
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