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Doc.: IEEE 802.11-14/0093r2 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKAAllied Telesis R&D Center 2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001.

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Presentation on theme: "Doc.: IEEE 802.11-14/0093r2 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKAAllied Telesis R&D Center 2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001."— Presentation transcript:

1 doc.: IEEE 802.11-14/0093r2 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKAAllied Telesis R&D Center 2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001 JAPAN +81-92-771-7630 hmorioka@root-hq.com May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 1 Removing FILS IP Address Configuration Date: 2014-05-12 Authors:

2 doc.: IEEE 802.11-14/0093r2 Submission May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 2 Abstract This document describes the reason why I intend to remove the FILS IP Address Configuration. The related CIDs are 4502 and 4429.

3 doc.: IEEE 802.11-14/0093r2 Submission CID4502 Comment –FILS IP Address Configuration is not required. Because the HLP encapsulation can perform all functions supported by the FILS IP Address Configuration. The duplication will make confusion. Proposed Change –Remove clause 10.44.3.2, 8.4.2.181 and 8.6.24. And modify rerated part in other clauses. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 3

4 doc.: IEEE 802.11-14/0093r2 Submission FILS IP Address Configuration FILS specific IP address configuration mechanism. No IP address continuity between APs. –Each AP has its own IP address pool. –Existing WLAN network has IP address continuity in a ESS. The IP address of the non-AP STA is assigned by the AP, not by the DHCP server. The request and response are carried by Association/Reassociation frames. The information carried by the mechanism is –IP address and netmask of non-AP STA –IP address and MAC address of the gateway –IP address (and MAC address if it’s in the same network) of the DNS server May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 4

5 doc.: IEEE 802.11-14/0093r2 Submission Benefit of FILS IP Address Configuration FILS IP Address Configuration is used to reduce the overhead caused by using the DHCP for the IP address assignment. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 5

6 doc.: IEEE 802.11-14/0093r2 Submission CID4429 Comment –what overhead is reduced? It looks just a personal opinion and meaningless. Proposed Change –Remove the sentence "FILS IP Address Configuration is used to recude the overhead caused by using the DHCP for tha IP address assignment." May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 6

7 doc.: IEEE 802.11-14/0093r2 Submission Performance FILS IP Address Configuration –Configuration can be done in 1-roundtrip between STA and AP. –IP address assignment is fast because the IP address assignment function is in the AP. DHCP in HLP encapsulation –Configuration can be done in 1-roundtrip between STA and AP with RCO. –IP address assignment can be fast (equivalent to FILS IP Address Configuration) with the DHCP server located in the AP. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 7

8 doc.: IEEE 802.11-14/0093r2 Submission Configuration Parameters FILS IP Address Configuration –IP address and netmask of the STA –IP address and MAC address of the gateway –IP address (and MAC address if it’s in the same network) of the DNS server DHCP in HLP encapsulation –IP address and netmask of the STA –IP address of the gateway –IP address of the DNS servers –And any other DHCP options Gratuitous ARP in HLP encapsulation –MAC address of the gateway –MAC address of any node in the same network, not limited to DNS servers. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 8

9 doc.: IEEE 802.11-14/0093r2 Submission Sequence May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 9 STA AP Association Request FILS IP Address Request Association Response FILS IP Address Rsponse FILS IP Address Configuration STA AP Association Request DHCPDISCOVER w/RCO Association Response DHCPACK w/RCO Gratuitous ARP HLP encapsulation

10 doc.: IEEE 802.11-14/0093r2 Submission Operation (single AP) May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 10 AP FILS DHCP Pool ai STA ai STA non-ai STA non-ai STA AP DHCP Pool ai STA ai STA non-ai STA non-ai STA FILS IP Address ConfigurationHLP encapsulation

11 doc.: IEEE 802.11-14/0093r2 Submission Existing Typical WLAN Network Consider to replace the APs to ai-capable APs. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 11 AP DHCP Server DHCP Server

12 doc.: IEEE 802.11-14/0093r2 Submission Replacing with HLP encapsulation AP Just replace. Mixture of ai APs and non-ai APs is not a matter. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 12 ai AP non-ai AP non-ai AP DHCP Server DHCP Server ai AP non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP

13 doc.: IEEE 802.11-14/0093r2 Submission Replacing with FILS IP Address Configuration AP May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 13 non-ai AP non-ai AP DHCP Server DHCP Server ai AP Pool non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP non-ai AP DHCP server must remain to support non-ai AP non-ai STA DHCP server must remain to support non-ai AP non-ai STA IP address pool may be modified. Assign new IP address pool. DHCP Server DHCP Server ai AP Pool DHCP server must remain to support non-ai STA DHCP server must remain to support non-ai STA ai AP Pool ai AP Pool ai AP Pool ai AP Pool ai AP Pool Manage the IP address pools of all APs and DHCP server. If the operator assumes 100 STAs connect to the network, the operator should assign at least 100 IP addresses to each IP address pool.

14 doc.: IEEE 802.11-14/0093r2 Submission Conclusion I could not find any technical benefits of FILS IP Address Configuration. I propose to remove FILS IP Address Configuration from the draft. –Remove clause 10.44.3.2, 8.4.2.181 and 8.6.24. And modify related part in other clauses May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 14

15 doc.: IEEE 802.11-14/0093r2 Submission Questions & Comments May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 15

16 doc.: IEEE 802.11-14/0093r2 Submission Motion Move to remove FILS IP Address Configuration from TGai draft. Moved: Seconded: Result (Y/N/A): May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 16

17 doc.: IEEE 802.11-14/0093r2 Submission IPv6 IPv6 specification has autoconfiguration mechanisms. We should use these mechanisms, because –Both ai and non-ai devices (including wired devices) are attached to the same network. –Non-ai devices use IPv6 autoconfiguration including DAD. –How to avoid conflict? –IPv6 specification is still improving. –How can we guarantee that ai specification never confilict with IPv6 specification in the future? HLP encapsulation can carry any higher layer packets, such as RA and DHCPv6. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 17

18 doc.: IEEE 802.11-14/0093r2 Submission Implementation FILS IP Address Configuration –New IP address configuration function must be implemented from scratch for both server and client. HLP encapsulation –Modify existing DHCP client. DHCP server modification will not be required if RCO is already implemented or RCO is not used. –Or, new ai-optimized DHCP client and server can be implemented from scratch as same as FILS IP Address Configuration if you want. I think it’s not good way. May 2014 Hitoshi Morioka, Allied Telesis R&D CenterSlide 18

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