IPv6 design, deployment, standards, and best practices.
Xeneth
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Question about IPv6 addressing

Mon Mar 12, 2012 1:47 pm

In IPv4, the first ip must be left out to be the network ID. Is the same true for IPv6?

For example, an an individual host be assigned the ip 2000:0:0:0:0:0:0:0? Some will ask what subnet, but just like IPv4 10.0.0.0, it's going to be the first no mater the slash notation.
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Reggle
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Re: Question about IPv6 addressing

Tue Mar 13, 2012 3:21 am

I believe according to the standards, you can use the first address in IPv6. A Cisco router allows configuration of it. I've met some applications making a problem out of it though.
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mellowd
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Re: Question about IPv6 addressing

Tue Mar 13, 2012 5:35 am

Not sure, but it's not like we are short of addresses so why even bother?

Xeneth
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Re: Question about IPv6 addressing

Sat Mar 17, 2012 6:29 am

True we are not in danger of running out, I just want to understand the addressing scheme. Better understanding. IPv6 is something I'm wanting to get into, so just looking around. I am going for CCNA in a couple of weeks, and this caught my eye.

Additional Question:
With the MAC to EUI-64 conversion, the second bit in the left byte is changed. All examples show "0000 0000 to 0000 0010", but is that added or flipped? so would "0000 0010" become "0000 0000" or "0000 0100"?
As I am told what I am meant for, I listen.
As I am shown what to do, I watch.
As I am expected to obey without question, I walk away.

Xeneth
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Re: Question about IPv6 addressing

Sat Mar 17, 2012 6:46 am

Going by http://www.silmor.de/ipaddrcalc.html, it's just flipped. If I can get a confirmation? It's not a known site.
As I am told what I am meant for, I listen.
As I am shown what to do, I watch.
As I am expected to obey without question, I walk away.

Reggle
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Re: Question about IPv6 addressing

Sun Mar 18, 2012 6:12 am

It's flipped, other bits are not affected.
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Xeneth
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Re: Question about IPv6 addressing

Mon Mar 19, 2012 1:52 pm

Thanks I'm going to study IPv6 on my own for a bit after getting CCNA, and this will make understanding easier.
As I am told what I am meant for, I listen.
As I am shown what to do, I watch.
As I am expected to obey without question, I walk away.

The Beard
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Re: Question about IPv6 addressing

Tue Mar 20, 2012 9:01 am

the flip is just for global links right?

Xeneth
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Re: Question about IPv6 addressing

Fri Mar 30, 2012 6:30 am

From what I understand, it flips every time the MAC is used with EUI-64 conversion for IPV6.
As I am told what I am meant for, I listen.
As I am shown what to do, I watch.
As I am expected to obey without question, I walk away.

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