IPv6 Addressing

More documents

Recommendations

Info

The IPv6 Address Space• 128-bit address space• 2 128 possible addresses• 340,282,366,920,938,463,463,374,607,431,768,211,456 addresses (3.4 x 10 38 )• 6.65*1023 address for every square meter• 128 bits were chosen to allow multiplelevels of hierarchy and flexibility indesigning hierarchical addressing androuting• Typical unicast IPv6 address:• 64 bits for subnet ID, 64 bits for interface IDUnderstanding IPv6 Slide: 3• Address scope• Link local• Site local• Global• Address have lifetime• Basic Address Types• Unicast• Address of a single interface• For one-to-one comm.• Multicast• Address of a set of interfaces• For one-to-many comm.• Anycast• Address of a set of interfaces• For one-to-nearest comm.• Nearest is defined as being closest interm of routing distanceGlobalLink LocalSite LocalUMMAAM•No more broadcast addressesA
Current AllocationFormatFraction ofAllocation Prefix address spaceReserved 0000 0000 1/256NSAP Allocation 0000 001 1/128Aggregatable Global Unicast 001 1/8Link-Local Unicast 1111 1110 10 1/1024Site-Local Unicast 1111 1110 11 1/1024Multicast 1111 1111 1/256Understanding IPv6 Slide: 5IPv6 Address Syntax• IPv6 address in binary form:00100001110110100000000011010011000000000000000000101111001110110000001010101010000000001111111111111110001010001001110001011010• Divided along 16-bit boundaries:0010000111011010 0000000011010011 0000000000000000 00101111001110110000001010101010 0000000011111111 1111111000101000 1001110001011010• Each 16-bit block is converted tohexadecimal and delimited with colons:21DA:00D3:0000:2F3B:02AA:00FF:FE28:9C5A• Suppress leading zeros within each 16-bit block:21DA:D3:0:2F3B:2AA:FF:FE28:9C5AUnderstanding IPv6 Slide: 6
Page 1: IPv6 AddressingUnderstanding IPv6 S
Page 5 and 6: Address type PrefixesAddress typeIP
Page 7 and 8: Local-Use Unicast Addresses• Link
Page 9 and 10: Compatibility Addresses• IPv4-com
Page 11 and 12: Anycast IPv6 Addresses• Assigned
Page 13 and 14: • Company ID• Extension ID• U
Page 15 and 16: Conversion of an IEEE 802 Address t

IPv6 Addressing

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?