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Submission doc.: IEEE 802.11-11/1124r0 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 1 Example of IP address assignment using Generic Upper.

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Presentation on theme: "Submission doc.: IEEE 802.11-11/1124r0 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 1 Example of IP address assignment using Generic Upper."— Presentation transcript:

1 Submission doc.: IEEE 802.11-11/1124r0 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 1 Example of IP address assignment using Generic Upper Layer Message IE Date: 2011-08-16 Authors: NameAffiliationsAddressPhoneemail Hiroki NakanoTrans New Technology, Inc. Sumitomo Seimei Kyoto Bldg. 8F, 62 Tukiboko-cho, Shimogyo, Kyoto 600-8492 JAPAN +81-75-213-1200cas@trans-nt.com

2 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 2 Principles Keep the layered network architecture. IEEE802 network is running under various upper layer protocols. IEEE802 should be a generic framework of link layers for upper layers. Upper layers are responsible for their own addressing architectures. For example, IETF is still extending DHCPv4/v6 protocols. Should we catch up their discussion forever?? Therefore, a mission of TGai is to provide a framework enabling upper layer (e.g. IPv4) to use their own protocol. (e.g. DHCPv4)

3 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 3 Generic Upper Layer Message IE The IE is proposed in order that management frames convey upper layer messages. This proposal solves problems: Multiple upper layers (IPv4, IPv6 etc.) bigger messages than maximum IE size (255) See 11-11-1003-02-00ai-upper-layer-data-on- management-frames for the detail.

4 Submission doc.: IEEE 802.11-11/1124r0 TGai Simplified Ideal Scenario August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 4 Association Request Association Response STA AP Beacon How about IPv4/IPv6?

5 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 5 IPv4’s case IPv4 uses DHCPv4 for IP address assignment. RFC4039 “Rapid Commit Option for the Dynamic Host Configuration Protocol version 4 (DHCPv4)” enables 2-message exchange. Only DHCPDISCOVER and DHCPACK are used. DHCPOFFER and DHCPREQUEST are omitted. TGai should not define IP address management process: Lease time management Behavior of renewing lease Error recovery … all other things DHCP does There are reasons TGai should not be involved in upper layer discussion: IPv4 has another minor methods like RARP, PPPoE…

6 Submission doc.: IEEE 802.11-11/1124r0 IPv4’s case using RFC4039 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 6 Association Request Association Response STA AP Beacon DHCPDISCOVER with Rapid Commit Option (RFC4039) tells that STA needs IP address. DHCPACK tells that DHCP server assigns IP address. TGai-capable dhcp process starts. dhcp process sends a packet via MLME interface, not a normal interface.

7 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 7 IPv6’s case IPv6 has two major methods: Stateless Address Autoconfiguration aka SLAAC (RFC4862) DHCPv6 (RFC3315) There are lot of reasons TGai should not be involved in upper layer discussion: ‘SLACC attack’ is a famous problem. DHCPv6 is being extended actively in IETF DHC WG.

8 Submission doc.: IEEE 802.11-11/1124r0 IPv6’s case using SLAAC (RFC4862) August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 8 Association Request Association Response STA AP Beacon Router Solicitation tells that STA needs configuration data. Router Advertisement tells configurations of this network. Router Advertisement tells that STA should use SLAAC.

9 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 9 TGai Evaluation TGai can assume an ideal IPv4 environment for TGai system evaluation. AP has DHCP server function. AP’s IEEE802.11 function cooperates with its DHCP server. IETF and each manufacturer can make effort to apply TGai to various environments. Management of IP address pool? New configuration options?

10 Submission doc.: IEEE 802.11-11/1124r0 Additional Example: Complex case 1 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 10 Association Request Association Response STA AP Beacon DHCPDISCOVER tells that STA needs IP address DHCPACK tells that DHCP server assigns IP address DHCP Server DHCPDISCOVER DHCPACK

11 Submission doc.: IEEE 802.11-11/1124r0 Additional Example: Complex case 2 August 2011 Hiroki Nakano, Trans New Technology, Inc.Slide 11 Association Request Association Response STA AP Beacon DHCPDISCOVER tells that STA needs IP address DHCPACK tells that DHCP server assigns IP address Action DHCPOFFER. Some reason makes DHCP choose 4-way handshake… DHCPREQUEST This should be a decision of upper layer’s designer.

12 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 12 Conclusion Keep the layered architecture. TGai should provide generic framework for upper layers. TGai should not define parameters for upper layers. TGai should not be involved in discussion about upper layer’s problems, solutions and developments. TGai can provide Generic Upper Layer Message IE for IP address assignment. This presentation also shows how Generic Upper Layer Message IE is used for IPv4/v6 address assignment. IPv4/v6 already has almost enough function for our purpose.

13 Submission doc.: IEEE 802.11-11/1124r0August 2011 Hiroki Nakano, Trans New Technology, Inc. Slide 13 Discussion

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