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Cisco Public © 2013 Cisco and/or its affiliates. All rights reserved. 1.

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Presentation on theme: "Cisco Public © 2013 Cisco and/or its affiliates. All rights reserved. 1."— Presentation transcript:

1 Cisco Public © 2013 Cisco and/or its affiliates. All rights reserved. 1

2 Cisco Public 2 IPv6 Address Notation Rule 1: Leading 0’s Rule 2: Double colon :: Network Prefixes

3 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 3  IPv6 addresses are 128-bit addresses represented in: One Hex digit = 4 bits 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64

4 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 4  IPv6 addresses are 128-bit addresses represented in:  Eight 16-bit segments or “hextets” (not a formal term) One Hex digit = 4 bits 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits 1 2 3 4 5 6 7 8

5 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 5  IPv6 addresses are 128-bit addresses represented in:  Eight 16-bit segments or “hextets” (not a formal term)  Hexadecimal (non-case sensitive) between 0000 and FFFF One Hex digit = 4 bits 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits 1 2 3 4 5 6 7 8

6 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 6  IPv6 addresses are 128-bit addresses represented in:  Eight 16-bit segments or “hextets” (not a formal term)  Hexadecimal (non-case sensitive) between 0000 and FFFF  Separated by colons One Hex digit = 4 bits 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits 1 2 3 4 5 6 7 8

7 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 7  How many addresses does 128 bits give us? 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits

8 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 8  How many addresses does 128 bits give us?  340 undecillion addesses or … 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits

9 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 9  How many addresses does 128 bits give us?  340 undecillion addesses or …  340 trillion trillion trillion addresses or … 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits

10 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 10  How many addresses does 128 bits give us?  340 undecillion addesses or …  340 trillion trillion trillion addresses or …  “IPv6 could provide each and every square micrometer of the earth’s surface with 5,000 unique addresses. Micrometer = 0.001 mm or 0.000039 inches” or…. 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits

11 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 11  How many addresses does 128 bits give us?  340 undecillion addesses or …  340 trillion trillion trillion addresses or …  “IPv6 could provide each and every square micrometer of the earth’s surface with 5,000 unique addresses. Micrometer = 0.001 mm or 0.000039 inches” or….  “A string of soccer balls would wrap around our universe 200 billion times!” 2001:0DB8:AAAA:1111:0000:0000:0000:0100/64 2001 : 0DB8 : AAAA : 1111 : 0000 : 0000 : 0000 : 0100 16 bits

12 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 12 2001.1111.2222.3333.4444.5555.6666.7777 No, hextets are separated by a colon 2001:AAAA:BBBB:CCCC:DDDD:EEEE:FFFF:GGGG No, G is not a hexadecimal number 2001:FACE:ACE0:CAFE:1111:2222:3333:4444:5555:6666 No, number of bits is more than 128 bits 2001:1111:2222:3333:44444:55555:6666:7777 No, hextet can only contain maximum of 4 hexadecimal digits

13 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 13  Two rules for reducing the size of written IPv6 addresses  Leading 0’s  Double Colon ::

14 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 14  Leading zeroes in any 16-bit segment do not have to be written 3ffe : 0404 : 0001 : 1000 : 0000 : 0000 : 0ef0 : bc00 3ffe : 0000 : 010d : 000a : 00dd : c000 : e000 : 0001 ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500

15 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 15  Leading zeroes in any 16-bit segment do not have to be written 3ffe : 0404 : 0001 : 1000 : 0000 : 0000 : 0ef0 : bc00 3ffe : 404 : 1 : 1000 : 0 : 0 : ef0 : bc00 3ffe : 0000 : 010d : 000a : 00dd : c000 : e000 : 0001 ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500

16 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 16  Leading zeroes in any 16-bit segment do not have to be written 3ffe : 0404 : 0001 : 1000 : 0000 : 0000 : 0ef0 : bc00 3ffe : 404 : 1 : 1000 : 0 : 0 : ef0 : bc00 3ffe : 0000 : 010d : 000a : 00dd : c000 : e000 : 0001 3ffe : 0 : 10d : a : dd : c000 : e000 : 1 ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500

17 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 17  Leading zeroes in any 16-bit segment do not have to be written 3ffe : 0404 : 0001 : 1000 : 0000 : 0000 : 0ef0 : bc00 3ffe : 404 : 1 : 1000 : 0 : 0 : ef0 : bc00 3ffe : 0000 : 010d : 000a : 00dd : c000 : e000 : 0001 3ffe : 0 : 10d : a : dd : c000 : e000 : 1 ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500 ff02 : 0 : 0 : 0 : 0 : 0 : 0 : 500

18 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 18 2001:0000:0000:0000:0000:0000:0000:0000 Answer - 2001:0:0:0:0:0:0:0 2001:1000:1001:1010:1100:0001:0101:0011 Answer - 2001:1000:1001:1010:1100:1:101:11 0010:1010:1020:0001:1000:0A0A:00FF:FF00 Answer - 10:1010:1020:1:1000:A0A:FF:FF00

19 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 19 2001:0:10:100:1000:AA:FF:101 Answer - 2001:0000:0010:0100:1000:00AA:00FF:0101 0:1:10:100:1000:CC:CC0:CCC Answer - 0000:0001:0010:0100:1000:00CC:0CC0:0CCC FF:0:0:0:0:0:0:A Answer - 00FF:0000:0000:0000:0000:0000:0000:000A FE8:0:0:0:0:0:0:1 Answer - 0FE8:0000:0000:0000:0000:0000:0000:0001

20 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 20  The second rule can reduce this address even further  Any single, contiguous string of one or more 16-bit segments consisting of all zeroes can be represented with a double colon ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500

21 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 21  Any single, contiguous string of one or more 16-bit segments consisting of all zeroes can be represented with a double colon. ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500 ff02 : : 500 Second RuleFirst Rule

22 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 22  Any single, contiguous string of one or more 16-bit segments consisting of all zeroes can be represented with a double colon ff02 : 0000 : 0000 : 0000 : 0000 : 0000 : 0000 : 0500 ff02 : : 500 Second RuleFirst Rule

23 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 23  Only a single contiguous string of all-zero segments can be represented with a double colon 2001 : 0d02 : 0000 : 0000 : 0014 : 0000 : 0000 : 0095

24 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 24  Only a single contiguous string of all-zero segments can be represented with a double colon  Both of these are correct… 2001 : 0d02 : 0000 : 0000 : 0014 : 0000 : 0000 : 0095 2001 : d02 :: 14 : 0 : 0 : 95 or 2001 : d02 : 0 : 0 : 14 :: 95

25 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 25  Using the double colon more than once in an IPv6 address can create ambiguity because of the ambiguity in the number of 0’s 2001:d02::14::95

26 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 26  Using the double colon more than once in an IPv6 address can create ambiguity because of the ambiguity in the number of 0’s 2001:d02::14::95 2001:0d02:0000:0000:0014:0000:0000:0095 2001:0d02:0000:0000:0000:0014:0000:0095 2001:0d02:0000:0014:0000:0000:0000:0095

27 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 27 2001:1111:0000:0000:1111:2222:1111:A1A1 Answer - 2001:1111::1111:2222:1111:A1A1 3001:0000:0000:0000:0000:0000:0000:1111 Answer - 3001::1111 3001:0000:0000:0000:1111:0000:0000:1111 Answer - 3001::1111:0:0:1111 FF02:0000:0000:0000:0000:0001:FF00:0001 Answer - FF02::1:FF00:1

28 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 28 2001:0101::A:B Answer - 2001:0101:0000:0000:0000:0000:000A:000B FF02::1:FF12:1 Answer - FF02:0000:0000:0000:0000:0001:FF12:0001 FE80::1 Answer - FE80:0000:0000:0000:0000:0000:0000:0001 ::1 Answer - 0000:0000:0000:0000:0000:0000:0000:0001 :: Answer - 0000:0000:0000:0000:0000:0000:0000:0000

29 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 29  IPv4, the prefix—the network portion of the address—can be identified by a dotted decimal netmask or bitcount 255.255.255.0 or /24

30 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 30  IPv4, the prefix—the network portion of the address—can be identified by a dotted decimal netmask or bitcount 255.255.255.0 or /24  IPv6 prefixes are always identified by bitcount (prefix length)

31 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 31  IPv4, the prefix—the network portion of the address—can be identified by a dotted decimal netmask or bitcount 255.255.255.0 or /24  IPv6 prefixes are always identified by bitcount (prefix length)  Prefix length notation: 3ffe:1944:100:a::/64

32 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 32  IPv4, the prefix—the network portion of the address—can be identified by a dotted decimal netmask or bitcount. 255.255.255.0 or /24  IPv6 prefixes are always identified by bitcount (prefix length).  Prefix length notation: 3ffe:1944:100:a::/64 16 32 48 64 bits

33 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 33 2001:DB8:CAFE:1111::1/64 Answer - network bits = 64, host bits = 64 Network Portion = 2001:DB8:CAFE:1111 Host Portion = 0000:0000:0000:0001 2001::1/96 Answer: network bits = 96, host bits = 32 Network Portion = 2001:0:0:0:0:0 Host Portion = 0:1

34 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 34 2001:1/80 Answer - network bits = 80, host bits = 48 Network Portion = 2001:0:0:0:0 Host Portion = 0:0:1 2001::1/16 Answer – network bits = 16, host bits = 112 Network Portion = 2001 Host Portion = 0:0:0:0:0:0:1

35 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 35 2001::1/8 Answer – network bits = 8, host bits = 120 Network Portion = 20 Host Portion = NN01:0:0:0:0:0:0:1 2001:1/4 Answer – network bits = 4, host bits = 124 Network Portion = 2 Host Portion = N001:0:0:0:0:0:0:1

36 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 36 2001:1/3 Answer - 3 bits for the network part and 125 bits for the host part Lets write the first Hextet 2001 in binary 0010 0000 0000 0001 (This is in binary) The first three bits are network part and the remaining bits are host part 0010 0000 0000 0001 001 in hex is 2 2 is the network part and the remaining bits are host bits

37 © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 37 FE80/10 Answer:The first 10 bits are network bits and the rest 118 bits are Host bits Lets write the first Hextet(FE80) in binary 1111 1110 10 00 0000 The first 10 bits (FE8 in Hex) is the network part 1111 1110 10 00 0000 10 bits (FE8) are network bits and the remaining are host bits

38 Cisco Public © 2013 Cisco and/or its affiliates. All rights reserved. 38

39 Thank you

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