It's Ars Tech's turn to bang the IPv4 exhaustion drum

Randy Bush randy at
Tue Aug 19 12:50:14 CDT 2008

> In practice, many routers require the packet to go twice in the hardware if
> the prefix length is > 64 bits, so even though it is a total waste of space,
> it is not stupid to use /64 for point-to-point links and even for loopbacks!

some of us remember when we thought similarly for /24s for p2p links,
especially when using rip.

and consider matsuzaki-san's dos vulnerability on a /64 p2p link.  the
prudent operational advice today is to use a /127.


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