IPV6 TOP LEVEL AGGREGATION IDENTIFIER ASSIGNMENTS TLA Identifier Assignments -------------------------- TLA Identifiers are defined in [RFC2374] and are assigned from the Format Prefix (FP) 001 (binary) in [RFC2373]. TLA ID assignments are listed below. Binary Value Hex Value IPv6 Prefix Assignment ---------------- --------- ----------- ------------------ 0 0000 0000 0000 0x0000 2000::/16 Reserved 0 0000 0000 0001 0x0001 2001::/16 Sub-TLA Assignments [RFC2450] 0 0000 0000 0010 0x0002 2002::/16 "6to4" [RFC3056] 1 1111 1111 1110 0x1FFE 3FFE::/16 6bone Testing [RFC2471] 1 1111 1111 1111 0x1FFF 3FFF::/16 Reserved Note: Hex values are right justified. All TLA ID values not listed above are reserved. Sub-TLA Identifier Assignments ------------------------------ Sub-TLA Identifiers are defined in [RFC2450] and are assigned out of TLA ID 0x0001. Note that use of the Reserved field to create the Sub-TLA field is specific to TLA ID 0x0001. It does not affect any other TLA ID. As specified in [RFC2450], Sub-TLA ID assignments are done in blocks. The initial Sub-TLA ID assignments to IP address registries are in blocks of 64 Sub-TLA IDs. These assignments are listed below. Binary Value IPv6 Prefix Range Assignment ---------------- ------------------------------- ------------------- 0000 000X XXXX X 2001:0000::/29 - 2001:01F8::/29 IANA 0000 001X XXXX X 2001:0200::/29 - 2001:03F8::/29 APNIC 0000 010X XXXX X 2001:0400::/29 - 2001:05F8::/29 ARIN 0000 011X XXXX X 2001:0600::/29 - 2001:07F8::/29 RIPE NCC 0000 100X XXXX X 2001:0800::/29 - 2001:09F8::/29 (future assignment) 0000 101X XXXX X 2001:0A00::/29 - 2001:0BF8::/29 (future assignment) 0000 110X XXXX X 2001:0C00::/29 - 2001:0DF8::/29 (future assignment) 0000 111X XXXX X 2001:0E00::/29 - 2001:0FF8::/29 (future assignment) 0001 000X XXXX X 2001:1000::/29 - 2001:11F8::/29 (future assignment) . . . . . . . . . 1111 111X XXXX X 2001:FE00::/29 - 2001:FFF8::/29 (future assignment) Where "X" indicates "0" or "1". All other Sub-TLA ID values not listed above are reserved. When a registry has assigned all of the Sub-TLA IDs in their block they can request that the IANA provide another block. The blocks assigned to a registry do not have to be contiguous. The block of Sub-TLA IDs assigned to the IANA (i.e., 2001:0000::/29 - 2001:01F8::/29) is for assignment for testing and experimental usage to support activities such as the 6bone, and for new approaches like exchanges. References ---------- [RFC2471] Hinden, R., R. Fink, J. Postel, "IPv6 Testing Address Allocation", RFC2471, December 1998. [RFC2373] Hinden, R., "IP Version 6 Addressing Architecture", RFC2373, July 1998. [RFC2374] Hinden, R., Deering, S., O'Dell, M., "An Aggregatable Global Unicast Address Format", RFC2374, July 1998. [RFC2450] Hinden, R., "Proposed TLA and NLA Assignment Rules", RFC2450, December 1998. [RFC3056] Carpenter, B., K. Moore, "Connection of IPv6 Domains via IPv4 Clouds without Explicit Tunnels", RFC 3056, February 2001. [Last updated 15 February 2001]