IPv6

1
IPv6

• Ashish Kapoor
• EE 548

2
Addressing

• 128 Bits Long
• Over 40 undecillion 401036 addresses
• QUOTE IPv6 is capable for any imagined demand
  Famous last words or .

3
Address Notation

• 8 groups of 4 hex characters separated by a colon
• Examples
• fe800000000000000200e8fffe61e92b
• fe80000200e8fffe61e92b
• fe80200e8fffe61e92b

4
Notation Contd.

• IPv4 address 121.16.4.6
• IPv6 versions of same address
• 00000ffff121.16.4.6
• ffff121.16.4.6
• Just added prefixes

5
Literal Addresses in URLs

• http//esus.cs.montana.edu/kapoor/index.php
• IPv4
• http//153.90.199.47/kapoor/index.php
• IPv6
• http//abcd153.90.199.47/kapoor/index.php
• RFC 2732, Hinden et al.

6
Address Types

• Unicast
• Assigned to one and only one node
• Every IPv6 node has at lest one unicast address
• Multicast
• Assigned to a group
• Every node in group receives incoming data
• Anycast
• Assigned to a group
• Sufficient that one node receives incoming data

7
Aggregatable Global Unicast Address Structure
RFC 2347

• 3 13 8 24 16 64 bits
  
• --------------------------------------------
  --------------
• FP TLA RES NLA SLA
  Interface ID
• ID ID ID
  
• --------------------------------------------
  --------------
• FP Format Prefix (001)
• TLA ID Top-Level Aggregation Identifier
• RES Reserved for future use
• NLA ID Next-Level Aggregation Identifier
• SLA ID Site-Level Aggregation Identifier
• INTERFACE ID Interface Identifier

8
Transition

• Goals for migrating to IPv6
• Co-existence of IPv4 and IPv6
• Independent, widespread IPv6 mechanisms
• Seamless and painless

9
Transition Dual Stacks

• Nodes will have both IPv4 and IPv6 stacks.
• Communication will take place depending upon the
  capabilities of the receiving node.
• DNS will maintain both protocol addresses where
  applicable.

10
Transition Automatic Tunneling

• IPv4 compatible addressing will be used to carry
  IPv6 data.
• IPv4 address will be extracted and IPv4 headers
  will be created