Hi Lasse, We use /64s. ::1 for one end, ::2 for the second end. Using /126s or /127s (or even /120s) is a result of going with the v4 mindset of conservation. With a /32 you have 65536 /48s, and then 65536 /64s. Guess you only need 1 /48 for all the p-to-p links, no? Regards, Carlos (portuguese NREN, 6deploy.eu project partner) On Mon, 24 Jan 2011, Lasse Jarlskov wrote:
Hi all.
While reading up on IPv6, I've seen numerous places that subnets are now all /64.
I have even read that subnets defined as /127 are considered harmful.
However while implementing IPv6 in our network, I've encountered several of our peering partners using /127 or /126 for point-to-point links.
What is the Best Current Practice for this - if there is any?
Would you recommend me to use /64, /126 or /127?
What are the pros and cons?
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Best regards,
Lasse Jarlskov
Systems architect - IP
Telenor DK