IPv6: numbering of point-to-point-links

Lasse Jarlskov laja at telenor.dk
Mon Jan 24 06:48:57 CST 2011

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?




Best regards,

Lasse Jarlskov

Systems architect - IP

Telenor DK

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