[c-nsp] IPv6 subnets for point-to-point links

David Freedman david.freedman at uk.clara.net
Mon May 9 12:12:17 EDT 2005


Tell me, what is wrong with /128?

Dave.

Marcel Lammerse wrote:
> Dear all,
> 
> according to the documentation I'm reading, it is not recommended to  
> assign /127 subnets on IPv6 point-to-point links since it breaks some  
> IPv6 mechanisms. An example is duplicate-address-detection (dad),  which 
> uses a subnet-router anycast address, that would conflict with  one of 
> the two available address on the link. However, the same  documentation 
> mentions that it was popular practice on the 6bone.
> 
> This confuses me.
> 
> Is it or is it not safe practice to use /127  instead of the  
> recommended /64 and waste a lot of address? What are people typically  
> using?
> 
> Thanks,
> Marcel
> 
> -- 
> Sponges grow in the ocean. That just kills me. I wonder how much  deeper 
> the ocean would be if that didn't happen
>                                                                         
>                Steven Wright
> 
> Marcel Lammerse
> lammerse at xs4all.nl
> 
> 
> 
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> 
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