nanog mailing list archives
Re: IPV6 Training Books
From: Roman <nurul () apnic net>
Date: Tue, 05 Apr 2011 11:07:13 +1000
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 () 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 () apnic net Internet Resource Analyst, APNIC sip: nurul () voip apnic net http://www.apnic.net phone: +61 7 3858 3100 direct: +61 7 3858 3190
Current thread:
- IPV6 Training Books Michael Ruiz (Apr 04)
- Re: IPV6 Training Books Niclas Zeising (Apr 04)
- RE: IPV6 Training Books Stefan Fouant (Apr 04)
- RE: IPV6 Training Books Michael Ruiz (Apr 04)
- Re: IPV6 Training Books Mark Andrews (Apr 04)
- Re: IPV6 Training Books Roman (Apr 04)
- Re: IPV6 Training Books Owen DeLong (Apr 04)
- Re: IPV6 Training _links_ Vesna Manojlovic (Apr 05)
- Re: IPV6 Training _links_ Justin Wilson (Apr 05)
- Re: IPV6 Training _links_ Mike Oliver (Apr 06)