IPV6, a 1,000 foot view

  • Has full time IPSEC
  • Eliminates the need for broadcast.
  • Uses UNICAST (one to one)
  • Uses MULTICAST FF01: (one to many)
  • Uses ANYCAST (one to closest)
    • Eliminates the need for HSRP/VRRP
  • NAT is not longer used
  • No more private addresses (the old v6 unique site local address is eliminated)
  • Uses Global scope address 2000::/3 (internet2 address 2001::/16)
  • Uses Link Local FE80: layer 2 auto generated
    • Think 169.254.0.0
  • (MAC – FFFE – MAC) = last 64 bits (48 bit MAC Address + 16 bit FFEE IPV6 )
  • Smaller Harder size ( more secure)
  • No need for a DHCP (uses auto generated prefix from the router)
  • Easier localhost address ::1 oppose to V4’s 127.0.0.1
  • IPv6 has eight blocks of 16 bits for a total of 128 (called hextets)

IPV4 RFC 791, September 1981 http://tools.ietf.org/pdf/rfc791.pdf
IPV6 Original RFC 1884, December 1995 (Now obsolete) http://tools.ietf.org/pdf/rfc1884.pdf
Revised July 1998 RFC 2373 (Now obsolete) http://tools.ietf.org/pdf/rfc2373.pdf
Revised April 2003 RFC 3513 (Now obsolete) http://tools.ietf.org/pdf/rfc3513.pdf
Current RFC 4291, February 2006 RFC 4291 http://tools.ietf.org/pdf/rfc4291.pdf

V 4’s 4.2 billion address pales in comparison to what V6 offers.
V6 has 340,282,366,920,938,463,463,374,607,431,768,211,456 available numbers

Three hundred and forty undecillion, two hundred and eighty-two decillion, three hundred and sixty-six nonillion, nine hundred and twenty octillion, nine hundred and thirty-eight septillion, four hundred and sixty-three sextillion, four hundred and sixty-three quintillion, three hundred and seventy-four quadrillion, six hundred and seven trillion, four hundred and thirty-one billion, seven hundred and sixty-eight million, two hundred and eleven thousand, four hundred and fifty-six.

http://www.thefreedictionary.com/undecillion < hear the pronunciation here.

Pasted from <http://itknowledgeexchange.techtarget.com/whatis/ipv6-addresses-how-many-is-that-in-numbers/>

The above is meant as a reference, information is not static.

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About Ron Staples

Ron has been working in the data, voice technologies field for over 15 years, he obtain his CCNA in 1999 and has worked for several fortune 500 companies. Since then he has re certified his CCNA and earned the following additional certifications, CCNA Voice and CCRMS.

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