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

Randy Bush randy at psg.com
Sat May 7 15:41:21 EDT 2005


>>> 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?
>> Don't do it.  If you want to use shorter prefixes, I suggest doing 
>> something like /112 or whatever.
> Ah, but *why* should you not do it?

/127 gets you in trouble with *cast.  use /126 or longer.

randy



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