Introduction to Ipv6

Introduction to IPv6

ISP/IXP Workshops

ISP Workshops

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Early Internet History

 Late 1980s

Exponential growth of the Internet

 Late 1990: CLNS proposed as IP replacement  1991-1992

Running out of “class-B” network numbers Explosive growth of the “default-free” routing table Eventual exhaustion of 32-bit address space

 Two efforts – short-term vs. long-term

More at “The Long and Windy ROAD” http://rms46.vlsm.org/1/42.html

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Early Internet History

 CIDR and Supernetting proposed in 1992-3

Deployment started in 1994

 IETF “ipng” solicitation – RFC1550, Dec 1993  Direction and technical criteria for ipng choice – RFC1719 and RFC1726, Dec 1994  Proliferation of proposals:

TUBA – RFC1347, June 1992 PIP – RFC1621, RFC1622, May 1994 CATNIP – RFC1707, October 1994 SIPP – RFC1710, October 1994 NIMROD – RFC1753, December 1994 ENCAPS – RFC1955, June 1996

ISP Workshops © 2010 Cisco Systems, Inc. All rights reserved.

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Early Internet History → 1996

 Other activities included:

Development of NAT, PPP, DHCP,… Some IPv4 address reclamation The RIR system was introduced

 → Brakes were put on IPv4 address consumption  IPv4 32 bit address = 4 billion hosts

HD Ratio (RFC3194) realistically limits IPv4 to 250 million hosts

ISP Workshops

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Recent Internet History The “boom” years → 2001

 IPv6 Development in full swing

Rapid IPv4 consumption IPv6 specifications sorted out (Many) Transition mechanisms developed

 6bone

Experimental IPv6 backbone sitting on top of Internet Participants from over 100 countries

 Early adopters

Japan, Germany, France, UK,…

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Recent Internet History The “bust” years: 2001 → 2004

 The DotCom “crash”

i.e. Internet became mainstream

...