Using /126 for IPv6 router links

Mathias Seiler mathias.seiler at
Sat Jan 23 12:52:21 UTC 2010


In reference to the discussion about /31 for router links, I d'like to know what is your experience with IPv6 in this regard.

I use a /126 if possible but have also configured one /64 just for the link between two routers. This works great but when I think that I'm wasting 2^64 - 2 addresses here it feels plain wrong.

So what do you think? Good? Bad? Ugly? /127 ? ;)


Mathias Seiler

MiroNet GmbH, Strassburgerallee 86, CH-4055 Basel
T +41 61 201 30 90, F +41 61 201 30 99

mathias.seiler at

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