On Thu, May 26, 2011 at 10:36:27AM +0200, Marco Hogewoning wrote:
on our side we use /126 for P2P links. I've heard some others using /64 or /127. Some allocate a /64 but configure a /126 to always have :1 and :2 in order to avoid mistakes by calculating the good hosts ip addresses.
Curious, why did you pick /126 ? What do you do with ::0 and ::3 ?
Marco
I understand that you asked (and in fact we use /31 for IPv4 P2P links). The fact is that when I decided the addressing plan, I was looking for implementation stories from others and based on what I've read, we decided to go on /126. No real reasons. We're always open to look deeper and make changes if necessary. We had to make a decision at this time and we went to /126 over /127 mainly because of RFC3627. Our main goal was to deploy IPv6 and tried to quickly find a good way to subnet our block. Regards, -- Pierre-Yves Maunier AS8218 IP/Project Engineer tel +33 1 49 97 07 45 mob +33 6 30 92 18 36 fax +33 1 49 97 07 30 pymaunier@neotelecoms.com Neotelecoms 21 rue La Boétie, 75008 Paris, France