# IPV6 Training Books

Roman nurul at apnic.net
Tue Apr 5 01:07:13 UTC 2011

```Best book on IPv6 (My personal opinion)

http://www.amazon.com/Migrating-IPv6-Practical-Implementing-Networks/dp/0471498920/ref=sr_1_16?ie=UTF8&qid=1301965365&sr=8-16

Roman

On 5/04/11 10:59 AM, Mark Andrews wrote:
> In message<690D7D20D2507C44BA8066926B2009890867FA at ES1002.ic-sa.com>, Michael R
> uiz writes:
>> Hello All,
>>
>>                  I am looking for some good reading material to get a better=
>>   understanding of IPV6.  I know how to convert HEX into decimal format.  Wh=
>> at I am looking for is how to under the CIDR notation and break them out in=
>> to subnets.   Thank you in advance.
>
> If you think in hex its straight forward to do CIDR in IPv6.  There
> are only three groupings on a non nibble boundaries.  You also
> display the entire 128 bits with the least significant bits set to
> zero.  The :: notation is used to shorten the displayed address.
>
> e.g for a /57, /58 and /59 with leading bits of 2001:23bc:fe8d:b200::/56
> you would have.
>
> /57	{0,1,2,3,4,5,6,7} {8,9,a,b,c,d,e,f}
> 	2001:23bc:fe8d:b200::/57
> 	2001:23bc:fe8d:b280::/57
> /58	{0,1,2,3} {4,5,6,7} {8,9,a,b} {c,d,e,f}
> 	2001:23bc:fe8d:b200::/58
> 	2001:23bc:fe8d:b240::/58
> 	2001:23bc:fe8d:b280::/58
> 	2001:23bc:fe8d:b2c0::/58
> /59	{0,1} {2,3} {4,5} {6,7} {8,9} {a,b} {c,d} {e,f}
> 	2001:23bc:fe8d:b200::/59
> 	2001:23bc:fe8d:b220::/59
> 	2001:23bc:fe8d:b240::/59
> 	2001:23bc:fe8d:b260::/59
> 	2001:23bc:fe8d:b280::/59
> 	2001:23bc:fe8d:b2a0::/59
> 	2001:23bc:fe8d:b2c0::/59
> 	2001:23bc:fe8d:b2e0::/59
>
> Note the last nibble before the :: is 0 and is there so that the
> final bits are all zeros.  The following all represent the same
> cidr block.
>
> 	2001:23bc:fe8d:b2e0::/59
> 	2001:23bc:fe8d:b2e0:0000:0000:0000:0000/59
> 	2001:23bc:fe8d:b2e0:0:0:0:0/59
>
> Normally you just assign /64 subnets and delegate address blocks
> on nibble boundaries to end customers, e.g. /48, /52, /56 or /60.
> This means that end customers don't need do deal with cidr block
> if they don't want to.  They can just route individual /64.
>
>> MAR.
>>

--
----------------------------------------------------------------------
Nurul Islam Roman                      email:         nurul at apnic.net
Internet Resource Analyst, APNIC       sip:       nurul at voip.apnic.net
http://www.apnic.net                   phone:         +61 7 3858 3100
direct:        +61 7 3858 3190

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