>INTRODUCTION<OF

IPv6

IPV6HEADER FORMAT

IPv6 EXTENSIONRouting:Fragmentation:Authentication: Encapsulation: Hop-by-Hop Options: Destination Options:

IPV6 ADDRESSING

UNICASTANYCASTMULTICAST

Comparison b/w

IPv6 &ipv4

Version IHL Type of Service Total Length

Identification Flags Fragment Offset

Time to Live Protocol Header Checksum

Source Address

Destination Address

Options Padding

Version Traffic Class Flow Label

Payload Length Next Header Hop Limit

Source Address

Destination Address

IPv4 header

IPv6 header

Larger address space

IPv4

32 bits or 4 bytes long

4,200,000,000 possible addressable nodes.

IPv6

128 bits or 16 bytes: four times the bits of IPv4

3.4 * 1038 possible addressable nodes

340,282,366,920,938,463,374,607,432,768,211,456

5 * 1028 addresses per person

TEXT representation

IPV6 ROUTING Provider Selection

(based on policy,performance, cost, etc.)

Host Mobility (route to current location)

Auto-Readdressing (route to new address)

IPv6 CapabilitiesImportant to support applications that require some degree of consistent throughput, delay, and/or jitter.Its applications are commonly described as "multi-media" or "real-time" applications.

IPv6 Security Different user communities have different security needs.IPv6 Authentication Header.IPv6 Encapsulating Security Header.

Transitioning from IPv4 to

IPv6How will the public Internet, which is based on IPv4, be transitioned to IPv6 ?

DUAL-STACK APPROACHTUNNELINGHEADER TRANSLATION

METHODs

A DUAL-STACK APPROACH

HEADER TRANSLATION

IPv6 packet is received with an IPv4-mapped IPv6 address. Translation exists for the incoming packet The payload is untouched, with the exception of ICMP and DNS packets. The resulting IPv4 packet is routed into an IPv4 cloud.If there is no IPv6 fragment header (fragmented packets are not supported in this release), the IPv6 header is translated into an IPv4 header :

From ipv6 to tpv4

When NAT-PT receives a packet addressed to a destination that lies outside of the attached IPv4 realm, the IPv4 header is translated to an IPv6 header.If there are no IPv4 fragments in the header (fragmented packets are not supported in this release), the IPv4 header is translated into an IPv6 header

from ipv4 to IPV6

Inaccuracies &

Speculation

There is no shortage of v4 space

The only people who ask about IPv6 are people who have heard something about it

IPv6 exhibits no added functionality over IPv4 + NAT.

lack of demand

IPv6 routing will change drastically before it becomes production

Routing is still a big problem in IPv6

IPv6 allocations and routing are cidr based; massive aggregation through new allocations; <12k origin AS’s for explicit policy

- only problem is providers punching holes in their aggregates

routing

FUTURE OF IPV6We may conclude that in the

future,we can expect to see changes in the Internet's network layer.

But these changes will likely occur

on a time scale that is much slower than the changes that will occur at the application layer.

IPv6 will make its way to the Internet, but it takes time.

ANY QUESTIONS

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