7、 Next generation Internet IPv6

IPV4 Problems and improvements

IPV4 32 position IPV6 128 position

IPV6 Integrate IPSec, Support multi header nesting ,MTU Find out

IPV4 The first one 20B  13 Field

IPV6 The first one 40B  8 Field , Reduced Baotou , Speed up processing .

edition 4 position 0110   Load length 16 position Jump limit 8 position

The first extended header is 0 Hop by hop options

IPV6 128 position   Colon separated hexadecimal （ Four binaries represent a hexadecimal ）

0123 It can be abbreviated as 123. 0000 Shorthand for ;;

Such as   8000：：123：0：CDEF

IPV4 The compatible address is written as ：：192.168.10.1

Address classification

IPV6 The format prefix of the address FP Used to represent Address type or subnet address .

1、 Unicast address

Uncertain address 0;0;0;0;0;0;0;0.   Return address 0;0;0;0;0;0;0;1

can gather Global unicast address ： amount to IPV4 Public address Prefix 001

chain Road local address ： Communication between adjacent nodes of the same link 1111 1110 10 combination MAC Address Automatic generation

standing Click local address ： amount to IPV4 Private network address Prefix 1111 1110 11

2、 Anycast address ： Route the closest interface

Only for IPV6 host , Can only be assigned to IPV6 Router

Cannot be the source address , Can only be used as a destination address .

3、 Multicast address IPV6 Format prefix of multicast address 1111 1111

Routing protocol OSPFv3、 BGP4+、 DHCPv6 、ICMPv6

Transition technology

Tunnel technology IPV6-IPV4-IPV6

Dual stack technology IPV4-IPV6

Translation technology

NAT-PT pure IPV6 And IPV4 Communication between nodes