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[DNA] Question about Make before Break



Dear DNA WG,

 

I have a question regarding the draft

http://www.ietf.org/internet-drafts/draft-hong-dna-if-l2-00.txt

 

Chapter 3.4 describes the Make before Break approach for Multiple Interfaces and contains the following statement:

 

…To support the make before break method on multiple interfaces, each link-layer technology must be the same.

 

I guess that this is not the case for mobile terminals which have more than one wireless interface for different bearer technologies, e.g., WLAN, GPRS and UMTS.

Especially for seamless roaming in overlay networks you will need access to different link-layer technologies.

 

What is the idea behind this statement in the draft?

 

Regards,

Stefan

 

-----

 

Universität Bremen / University of Bremen

FB 1 - ikom/ComNets

Dipl.-Ing. Stefan Aust

Otto-Hahn-Allee NW1

28359 Bremen - Germany

 

Tel: +49 421 218 8264

Fax: +49 421 218 3601

Mail: aust@comnets.uni-bremen.de

Web: www.comnets.uni-bremen.de/~aust