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IPv6 over 802.16 IPv6CS

IPv6 over 802.16 IPv6CS. B. Patil, JH. Choi, B. Sarikaya, F. Xia, S. Madanapalli November 7, 06. What the I-D specifies:. Addressing and Operation of IPv6 over the IPv6 convergence sublayer of 802.16 Recommends the assignment of unique prefix(es) for each host

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IPv6 over 802.16 IPv6CS

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  1. IPv6 over 802.16 IPv6CS B. Patil, JH. Choi, B. Sarikaya, F. Xia, S. Madanapalli November 7, 06

  2. What the I-D specifies: • Addressing and Operation of IPv6 over the IPv6 convergence sublayer of 802.16 • Recommends the assignment of unique prefix(es) for each host • Based on a point-to-point link between the host and the AR

  3. The IPv6 convergence sublayer • The 802.16 MAC is connection oriented • The CS is a part of the MAC • Multiple variants of service specific CS’ exist • IPv6 CS, IPv4 CS and Eth CS are types of Packet CS • IPv6 runs directly over the 802.16 MAC (I.e over the IPv6 CS part of the MAC)

  4. Network model A BS/IPv6 AR IPv6Host Transport Connection (CID) B BS IPv6Host CIDx CIDy IPv6 AR IPv6Host

  5. IPv6 Link Host BS IPv6 AR IPv6 IPv6 IPv6 IPv6 IP-CS IP-CS GRE GRE LNK MAC MAC IP IP LNK LNK PHY PHY PHY PHY PHY IPv6 link • On completion of the network entry procedure (.16 specific): • A transport connection is established between the host and BS • In case the AR is separate a L2 tunnel mapped to the transport connection is created between the BS and AR • The host can now send/receive IP packets (RA/RS, DHCP, ND) - IPv6 link up

  6. Prefix assignment • Each MS is on a separate subnet as a result of the point-to-point link. One or more /64 prefixes should be assigned to a link which consists of only an AR and an MS • A unique prefix(es) is allocated for a host • The prefix is advertised in a Router Advertisement (RA) message with standard Prefix Information Option

  7. Neighbor Discovery • Neighbor Discovery is performed as per RFC 2461. • Router Discovery • After host attachment, it may send an RS and an AR would reply with a suitable RA. Or the AR may send an RA to the host upon IPv6 link establishment. The AR may send unsolicited RAs periodically. • Prefix Discovery • Prefix is recommended to be advertised with L-bit set to facilitate DNA operation.

  8. IPv6 addressing • Interface Identifier • The MS has a 48-bit MAC address as specified in 802.16. With the MAC address, the MS generates the 64 bit interface identifier (IID) as per RFC2464 for address autoconfiguraiton. • For addresses based on privacy extensions, the MS may generate random IIDs as specified in RFC3041. • Duplicate address detection • DAD is performed as per RFC2461 and RFC2462.

  9. IPv6 addressing • Stateless address autoconfiguration is performed as per RFC 2461, 2462. • Obtaining the IPv6 address through stateful address autoconfiguration method is as per the details in RFC3315

  10. WG LC Issues • Harmonize terminology with the PS doc • Reference to RFC3314 as the precedent to be modified and the link model discussion referenced instead • MTU value to be used from RA • Reference DNA I-D instead of RFC4135 • Reference RFC 3633 as a means for obtaining the prefixes to be assigned

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