Stateless automatic IPv4 over IPv6 Tunneling (SA46T)

Transcription

1 Stateless automatic over IPv6 Tunneling () draft-matsuhira-sa46t-spec-01.txt Naoki Matsuhira Fujitsu Limited Maastricht, July

2 Configuration Backbone : Stateless Automatic over IPv6 Tunneling 2

3 Function of (1) Encapsulation / Decapusulation of packet IPv6 IPv6 (1-1) Return ICMP Packet too big message (if exceed MTU) Backbone (2) Route Advertisement of 3

4 address architecture and routing IP address of inner header 32bits address IP address of outer IPv6 header ( address) /24 128bits address prefix network plane ID address /120 Locator (IPv6) 4 Locator () Identifier

5 Example of address format IPv6 Global Unicast Address Format(RFC3587) 3 45bits 16bits 64bits 001 global routing prefix subnet ID Interface ID allocated from ISP Select by organization EUI-64 address (64bit MAC) address Use part of global address space (e.g. one subnet) 001 global routing prefix subnet ID network plane ID address address prefix 2 32 =about 4.3 billions networks space 5

6 Src: Dst: Route Advertisement Src: <prefix>: Dst: <prefix>: Src: Dst: IPv <prefix>: /120 <prefix>: / / / /24 Backbone <prefix>: / / / / / / /24 <prefix>: 001+global routing prefix + subnet ID + network plane ID 6

7 Stacking Multiple s (Using same Address, i.e. private address) Src: Dst: / /24 Src: Dst: / /24 IPv6 (plane#1) Src: <prefix#1>: Dst: <prefix#1>: <prefix#1>: /120 IPv6 Backbone <prefix#2>: /120 (plane#2) (plane#1) <prefix#1>: /120 Src: <prefix#2>: Dst: <prefix#2>: (plane#2) <prefix#2>: / /24 Src: Dst: / /24 Src: Dst: /

8 Configuration of Only one line per Three information needed, can represent in one line address prefix + network plane ID /Prefix Length N numbers of s in a One line per x N = N lines in the network static tunneling require N(N-1) Adding new Configure one line to new No change needed to existing s 8

9 Host Configuration in Configuration Server with DHCP Server Request (MAC Address) Host in Response plefix+v4planeid/prefix Allocatable address block Protocol (TBD) ~ DHCP Request DHCP Response DHCP Protocol 9

10 Applicability of (draft-matsuhira-sa46t-applicability-00.txt) IPv6 only Campus / Enterprise / ISP Backbone Possible transition scenario, edge based solution VPNs over IPv6 backbone Pure L3 solution, can mix different L2 (wire and wireless) Over 4096 possible, 4.3 billion with 32bits plane ID Inter AS VPN with Global address address reuse ( address sharing) Possible solution for Global address running out Can reuse Net10 in each plane 4.3 billion plane with 32bits plane ID Possible Option of Tunneling technology for DS-Lite? 10

11 Access with address reuse v4nat + IPv6 plane #1 Dual Stack(NAT less) Dual Stack IPv6 Global Private The Internet v4nat + IPv6 v4nat + IPv6 v4nat + IPv6 plane #2 Access plane #3 plane #n : as DS-Lite Tunneling Technologies Home 11

12 Current Status and Next Step Current Status Initial I-Ds (spec & gaddr) submitted in Feb 2010 Presentation at v6ops WG, 77th Anaheim meeting Suggested continuing in softwire wg update spec and gaddr I-Ds and applicability I-D submitted in July 2010 Next Step Implementation Experiment in testbed network Planning to report both implementation and experiment at next IETF meeting Interests? WG documents? 12

13 (1) Reduce operation cost by IPv6 only (2) Reallocate addr from B.B. to Stub Summary (4) No special protocol (3)Less configuration plane#1 plane#2 plane#n Backbone : : : (6) Stacking Private networks (8)Provide Redundancy (5)No dependence with L2 (7)Easy stop operation (just remove ) 13

14 s as IPv6 application provided by 14

15 Prepare for questions 15

16 Route # of route is same as # of route Total # of route (both IPv6 and ) is remain the same with Dual Stack operation Route aggregation may possible same manner with route aggregation Default route may used prefix / 96 is example of default route Can reduce # of route 16

17 Enterprise / Campus Section Section Section Corporate IT Backbone Section Section Section Section 17

18 ISP Backbone Customer Customer Customer ISP Backbone Customer Customer Customer Customer 18

19 VPN service by ISP A.com ( only) A.com ( only) B.com (Dual Stack) B.com ( only) C.com (Dual Stack) ISP Backbone A.com ( only) A.com (Dual Stack) B.com ( only) B.com (Dual Stack) C.com ( only) plane #A plane #B plane #C 19

20 Configuration without Global address Backbone Backbone Stub Stub (Dual Stack) Stub Stub (Dual Stack) 20

21 Configuration with Global address Backbone Backbone Stub Stub (Dual Stack) Stub Stub (Dual Stack) 21