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Welcome to Module 1 of the ipv6 MIBs seminar from InterWorking Labs.

In this one we will be discussing some of the background for ipv6 itself.

The documents are listed in the following two slides.

The first slide are the normative references. These describe the actual workings of the protocol, and must be adhered to.

The second set are some extra information that describes useful things to go along with the protocol but for our particular purposes they are not normative.

For the MIBs themselves, the first ones are the controlling authorities and the others just provide additional information.

IPv6 is a response to a problem discovered in roughly 1992 where we were starting to run out of IPv4 addresses.

Two to the 32nd does not really provide quite enough addresses for a completely global network.

If you think about the number of people in the world, there's just not quite enough.

So IPv6 went to a much larger address scheme, 2 to the 128th.

IPv6 also took the opportunity to add things that had been looked into for IPv4, and maybe added on the side or not fully implemented.

IPv6 brought them into the main protocol.

This included things such as local and global addresses, so that you could have one address that had only local scope, and would be restricted to one area, and global

addresses that would cover the entire network.

It also added the security option at the IP layer.

This was something that had been worked out in IPv4, but was actually made a requirement in IPv6.

Autoconfiguration, where you can just plug a box into the network, and it will pick up much of its information from the network itself, in particular from router announcements, and then be able to operate.

This doesn't work for all possible combinations of things, but it works for relatively simple stuff.

You would be able to plug a printer into your network and it would be able to be on the network and start working. Other systems learning of the printer might require some other effort, but the printer itself would be able to interoperate.

It also switched to using multicast instead of broadcast for many things.

This will provide a much better performance on the network where you don't have broadcast storms.

Instead of one system trying to find another and interfering with everybody, it will be able multicast and limit the amount of traffic on the network.

Lastly there's Neighbor Discovery, which has been referred to as "ARP on steroids".

This allows one system to learn about another to translate an IP address into a MAC address.

It includes some other stuff in terms of figuring out duplicate addresses and is a somewhat more robust version than ARP actually was.

This concludes Module 1.


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