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Supplemental Information for HLCF

Supplemental Information for HLCF. Authors:. Date: 2012-05-17. Abstract. This presentation shows some example sequenses of HLCF as a supplemental information of 11-12/273r9. DHCPv4. DHCP Client. DHCP Server. DHCP Client. DHCP Server.

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Supplemental Information for HLCF

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  1. Supplemental Information for HLCF Authors: • Date: 2012-05-17 Hitoshi Morioka, Allied Telesis R&D Center

  2. Abstract • This presentation shows some example sequenses of HLCF as a supplemental information of 11-12/273r9. Hitoshi Morioka, Allied Telesis R&D Center

  3. DHCPv4 DHCP Client DHCP Server DHCP Client DHCP Server • With Rapid Commit Option (RCO), DHCPv4 can complete IP layer configuration in 1 round-trip packet exchange. DHCPDISCOVER DHCPDISCOVER w/RCO DHCPOFFER DHCPACK w/RCO DHCPREQUEST DHCPACK Hitoshi Morioka, Allied Telesis R&D Center

  4. IPv6 Stateless Address Autoconfiguration Host Router (Router Solicitation) Router Advertisement Neighbor Solicitation (for DAD) • Duplicate Address Detection (DAD) is mandatory. • IPv6 Stateless Address Autoconfiguration can configure only IP address and default gateway. • It cannot configure other items such as DNS server addresses. Hitoshi Morioka, Allied Telesis R&D Center

  5. DHCPv6 Host Router Host Router (Router Solicitation) • Duplicate Address Detection (DAD) is mandatory. • Host determines whether DHCP to be used or not by the flag in RA. • DHCPv6 cannot carry default gateway address. • So DHCPv6 must be used with RA. (Router Solicitation) Router Advertisement Router Advertisement DHCP Server DHCP Server DHCP Solicit w/RCO DHCP Solicit DHCP Reply w/RCO DHCP Advertise DHCP Request Neighbor Solicitation(for DAD) DHCP Reply Neighbor Solicitation(for DAD) Hitoshi Morioka, Allied Telesis R&D Center

  6. IPv6 configuration issues • In both case (stateless autoconfiguration and DHCPv6), IPv6 configuration cannot complete in 1 round-trip packet exchange which initiated by STA. • Modifying IPv6 configuration mechanism is not our business. • So we have no choice but to give up 1 round-trip higher layer configuration for IPv6 at this time. (without modification of IPv6 configuration mechanism) Hitoshi Morioka, Allied Telesis R&D Center

  7. Per STA Information • AP keeps the following information per STA during association. • HLCF message • Higher Layer Configuration packet(s) piggybacked by Association Request. • HLCF state • State of the HLCF, for example • Wait for authentication • Transmitted to server (wait for reply) • Received from server • Transmitted to STA Hitoshi Morioka, Allied Telesis R&D Center

  8. Hitoshi Morioka, Allied Telesis R&D Center Authentication Success & DHCPv4 w/RCO in time AS DHCP Server STA AP FILS Assoc. Req. (Inform dot11AssociationResponseTimeOut) (piggyback DHCP) Auth. Req. AP Keeps DHCP Message Auth. Resp. VLAN Setup < dot11AssociationResponseTimeOut DHCPOFFER w/RCO AP Keeps HLCF State DHCPACK w/RCO FILS Assoc. Resp. (piggyback DHCP) Association Completes

  9. Hitoshi Morioka, Allied Telesis R&D Center Authentication Success & DHCPv4 w/RCO not in time AS DHCP Server STA AP FILS Assoc. Req. (Inform dot11AssociationResponseTimeOut) (piggyback DHCP) Auth. Req. AP Keeps DHCP Message Auth. Resp. VLAN Setup < dot11AssociationResponseTimeOut DHCPOFFER w/RCO AP Keeps HLCF State FILS Assoc. Resp. (piggyback DHCP) Association Completes DHCPACK w/RCO (as normal data frame)

  10. Hitoshi Morioka, Allied Telesis R&D Center Authentication Success &IPv6 stateless address autoconfiguration STA AP AS Router FILS Assoc. Req. (Inform dot11AssociationResponseTimeOut) (piggyback ICMPv6 RS) Auth. Req. AP Keeps RS Auth. Resp. VLAN Setup < dot11AssociationResponseTimeOut ICMPv6 RS AP Keeps HLCF State ICMPv6 RA FILS Assoc. Resp. (piggyback ICMPv6 RA) Association Completes DAD by Data Frames

  11. Hitoshi Morioka, Allied Telesis R&D Center Authentication Success &IPv6 stateful address autoconfiguration STA AP AS Router FILS Assoc. Req. (Inform dot11AssociationResponseTimeOut) (piggyback RS) Auth. Req. AP Keeps RS Auth. Resp. VLAN Setup < dot11AssociationResponseTimeOut ICMPv6 RS AP Keeps HLCF State ICMPv6 RA FILS Assoc. Resp. DHCP Server (piggyback ICMPv6 RA) Association Completes DHCP by Data Frames

  12. Hitoshi Morioka, Allied Telesis R&D Center Authentication Failure AS STA AP FILS Req. (Inform dot11AssociationResponseTimeOut) (piggyback DHCP) Auth. Req. AP Keeps HLFC Message Auth. Resp. (fail) AP Keeps HLCF State FILS Resp. (fail)

  13. References • 11-12/273r8: SFD Text for Upper Layers • RFC2131: Dynamic Host Configuration Protocol • RFC4039: Rapid Commit Option for DHCPv4 • RFC4862: IPv6 Stateless Address Autoconfiguration • RFC3315: Dynamic Host Configuration Protocol for IPv6 Hitoshi Morioka, Allied Telesis R&D Center

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