1. IPv6 at UCAR Pete Siemsen 1/14/2014

2. What is IPv6? Next generation of the Internet Protocol. Design started in 1993 First standards: 1998 2

3. What ’ s wrong with IPv4? Address exhaustion Routing tables getting large (400k+) Improved end-to-end connectivity (no NAT) 3

4. Features of IPv6 Ugly 128-bit addresses – Old: 128.117.63.6 – New: 2001:468:503:3f::94eb Co-exists with IPv4, called “dual-stack” Can auto-configure end hosts (we won’t) Minor new things: Anycast, Mobile, Security 4

5. IPv6 at NCAR today Not much demand We’ve had limited IPv6 for years Test VLANs exist at ML and FL Very little traffic Works well 5

6. IPv6 Future at NCAR NETS leading, with NCAB oversight Will convert existing VLANs to dual-stack Gradual, division-by-division, when asked to Wireless too NETS is testing IPv6 DNS/DHCPv6/IPAM servers Won’t use auto-configuration 6

7. Impact of IPv6 at NCAR We expect little negative user impact More network complexity More security complexity Better reachability to IPv6-capable sites 7

8. Questions? 8 siemsen@ucar.edu