1. IPv6 at the University of Wisconsin Hopefully 79,228,162,514,264,337,593,543,950,336 IP addresses will be enough for a while. A subset of the UW IPv6 Task Force: Dale W. Carder - DoIT Network Svcs. Bob Plankers - DoIT Sys Engineering Steve Barnet - IceCube 2008-09-26

2. Agenda Quick overview & introductions –Jurgen IPv6 Networking Crash Course –Dale Technology issues –Bob End-User issues –Steve Questions –Jurgen or Al, moderator

3. Why are we here? -IPv4 resources, shared by campus, are running out. -IPv4 address space, shared by the world, is running out. - The need for the true, global, unencumbered, end-to-end connectivity we have today will continue to exist.

4. What is this IPv6 thing? “Just another protocol” –(remember appletalk, decnet, ipx, etc?) A Method to continue to give all internet endpoints a globally unique address in the future. Not a drop-in replacement for IPv4. In fact, it’s natively incompatible with IPv4! (FAIL)

5. Addressing Structure “96 more bits, no magic” IPv4 address – 32 bits – “dotted quad” format – 128.104.181.26 IPv6 address – 128 bits – hexadecimal format – 2607:f388:e:100:217:f2ff:fe0a:bdf6 No Native Compatibility between the two.

6. IPv6 Subnet features All Subnets are the same, fixed size, supporting a nearly “unlimited” number of hosts. UW holds an ISP-size allocation, which allows for theoretically 4 billion subnets. This means we can give “a lot” UW entities “a lot” of subnets. One Example method: 2607:f388:0143:1001:0217:02ff:fe0a:bdf6 UWDept ID Host ID Dept subnet ID

7. IPv6 host addressing features Automatic address, based on MAC address – MAC: 00:17:f2:0a:bd:f6 – IPv6: 2607:f388:e:100:217:f2ff:fe0a:bdf6 Static assigned addresses -2607:f388:ab:2ef::53 “Privacy” addresses - clients change address every day Shorthand notation 2607:f388:ab:2ef::1 equals 2607:f388:00ab:02ef:0000:0000:0000:0001

8. IPv6 / IPv4 coexistence Did I mention they are incompatible? - However, you can run both at the same time. This is called “Dual Stack”. An IPv6 enabled host checks DNS and prefers using IPv6 when it can > dig ricotta.doit.wisc.edu any ricotta.doit.wisc.edu. 14340 IN AAAA 2607:f388:e:100:217:f2ff:fe0a:bdf6 ricotta.doit.wisc.edu. 10341 IN A 144.92.67.161

9. IPv4 / IPv6 Coexistence (cont) The most reasonable deployment model for campus would be to run dual stack. Hosts will need to run v6 to get around NAT, or talk to regions of the world without v4. This will be critical for servers. Hosts will need to run v4 indefinitely to talk to “legacy” v4-only hosts, applications, lab equipment, etc.

10. DHCP & DNS in v6 Hosts don’t have to use DHCP, although it’s still useful to get DNS server info via DHCP DHCP can still be used for static host assignment. Since host IPv6 addresses are messy, DNS will become more important. You may want to consider using dynamic dns from the dhcp server.

11. IPv6 on the UW network today We have our address space, and a preliminary allocation plan. Core routers are running v6 today. Some testing has occurred. Firewalling is a weak link. Integration into AANTS will take some time.

12. End of dale’s content The next slides are stuff I had lying around toss them or make new ones whatever

13. Why UW must adopt IPv6 at some point IPv6 will be the only method left for true end- to-end connectivity Collaboration with entities beyond North America To be competitive Business Continuity

14. IPv6 timeline Right now there are a few people trying to reach us via IPv6. At some point, there will be people who will only be able to reach us via IPv6. IPv6 will probably be the only way to ensure global reachability. Campus Backbone Ready

15. IPv6 Roadblocks 3rd Party Application Support Numerous Backend Systems Legacy Systems Staff Training Transition Issues Need to make IPv6 a Requirement on all new Software/System acquisitions.

16. IPv6 Planning Task force stuff

17. Other stuff Host support - native support in MacOS, Vista, Unixen - it’s there, but not on by default in XP

18. Security OMFG, really?

19. Steal more content from the Michaels http://net.doit.wisc.edu/~dwcarder/HAR E-v6%202008-08-27.pdf