文档介绍：ZyXEL Confidential Address Autoconfiguration Feng Zou SW2 munications Corp. 04/11/2006 ZyXEL Confidential Outline ? Why We Need Address Autoconfiguration? ? IPv6 Address Structure Review ? How to Autoconfiguration? ? Autoconfiguration Process ? Autoconfigured Address States ? Types of Autoconfiguration ? Q&A ZyXEL Confidential Why We Need Address Autoconfiguration? ? The size of an address in IPv6 is 128 bits ? Each interface have multiple IPv6 addresses ? It’ s difficult to configure those IP addresses manually MAC: 00-B0-D0-23-47-33 FE80:: 2B0:D0FF:FE23:4733 (link-local address) FEC0::F282: 2B0:D0FF:FE23:4733 (site-local address) 3FFE:2900:D005:F282: 2B0:D0FF:FE23:4733 (global address) FF02::1:FF 23:4733 (solicited-node address) Host A ZyXEL Confidential IPv6 Address Structure Review ? Link-local address ? FE80 :: XXXX:XXXX:XXXX:XXXX (Fixed Prefix) (Interface ID) 1111 1110 10 Interface ID 10 bits 64 bits 000 . . . 000 54 bits ZyXEL Confidential IPv6 Address Structure Review ? Site-local address ? FEC0 :: SSSS : XXXX:XXXX:XXXX:XXXX (Fixed) ( ID) Prefix (Interface ID) 1111 1110 11 Interface ID 10 bits 64 bits 000 . . . 000 38 bits ID 16 bits ZyXEL Confidential IPv6 Address Structure Review ? Aggregatable global address ? Prefix + Interface ID TLA ID Interface ID 13 bits 64 bits SLA ID 24 bits 001 NLA ID 16 bits Res 8 bitsZyXEL Confidential IPv6 Address Structure Review ? Solicited-node address ? FF02::1:FF XX:XXXX (Fixed Prefix) (last 24 bits of Interface ID) 104 bits Interface ID 64 bits Unicast prefix 64 bits FF02: 24 bits :1:FF 0:0:0:0 XX:XXXX ZyXEL u xxxxxxxx xxxxxxxx xxxxxxxx 11111111 11111110 0xFF 0xFE EUI-64 u 24 bits 24 bits xxxxxxxx xxxxxxxx xxxxxxxx IEEE 802 Address (MAC) U 64 bits 11111111 11111110 xxxxxxxx xxxxxxxx xxxxxxxx Interface ID ZyXEL Confidential How to Autoconfigure Address IPv6 address: Prefix + Interface ID Interface ID is converted from MAC ? Link-local address ? Prefix FE80:: is fixed ? Can be deter