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Doc.: IEEE 802.11-11/0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 1 IP Address Assignment in FIA Date: 2011-05-10 Authors: NameCompanyAddressPhoneemail.

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Presentation on theme: "Doc.: IEEE 802.11-11/0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 1 IP Address Assignment in FIA Date: 2011-05-10 Authors: NameCompanyAddressPhoneemail."— Presentation transcript:

1 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 1 IP Address Assignment in FIA Date: Authors: NameCompanyAddressPhone Robert Moskowitz Verizon Business Sutherland, Oak Park, MI 48237, USA

2 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 2 Abstract This document presents an approach to assigning IP addresses during the ASSOCIATION phase in link establishment.

3 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 3 Agenda Problem statement Solution overview Conclusions

4 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 4 Problem Statement Why Fast Address Assignment? –STA always 'knows' at link establishment if an IP address is needed for the link, and for which IP version(s). –IP address assignment is a MAC supported function. Ultimate goal: –Can we shorten the time for address assignment?

5 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 5 Problem Statement IP addressing Methodologies –DHCP – v4 and v6 AP as DHCP server AP as MAC bridge with DHCP server 'behind it' AP as DHCP relay –IPv6 Neighbor Discovery Router Announcements AP as Router AP as MAC bridge with RA server 'behind it' AP acting as RA 'relay'

6 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 6 Problem Statement AP as MAC bridge will NOT allow for IP addressing during ASSOCIATE –AP MUST have some direct support for DHCP or IPv6 RA RA 'relay' is a 'simple' caching mechanism –DHCP relay service MAY result in ASSOCIATION RESPONSE timing challenges Are there any timing considerations for the ASSOCIATE RESPONSE? –Not in , but claims there are in WiFi certification (5 ms) –If address is not available within time window, ASSOCIATE with 'no address yet'. STA then uses 'standard' datagram method? What to do with DHCP response when it finally comes?

7 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 7 Problem Statement To get an IP address as part of ASSOCIATE, the STA MUST ask for it in the REQUEST Should ASSOCIATE RESPONSE timing be loosened if REQUEST contained a request for an IP address? –If so, how much time is 'reasonable'?

8 doc.: IEEE /0756r0 Submission May 2011 Robert Moskowitz, VerizonSlide 8 Conclusions It is possible, and in many cases practical, to deliver an IP address during ASSOCIATE This is a clear layer violation, but can save time for Link Setup Thank you!


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