nanog mailing list archives

RE: Internet Edge Router replacement - IPv6 routetablesizeconsiderations


From: "George Bonser" <gbonser () seven com>
Date: Thu, 10 Mar 2011 20:34:05 -0800

=
Of course, it does - you may have many content farms/instances, and
taking down point-to-point links can DoS your entire set of
farms/instances, whereas an attack against a given endpoint access
network doesn't necessarily mean that your other
properties/networks/services are being attacked, as well.

And I say taking down 10 such farms is no bigger problem than taking
down 10 /64 backbone links.  Same challenge. A /64 is a /64, seen one
you've seen them all. 


There is no good reason to use /64s on point-to-point links.  It is
wasteful (please, no more about the supposed infinitude of IPv6
addresses; some of us reject this as being shortsighted and
insufficiently visionary concerning eventual one-time-uses of IPv6
addresses at nanoscale) and turns your routers into sinkholes.  It is
a
Very Bad Idea.

I wouldn't say it is wasteful so much as it is unnecessary but the
difference is that everything is pretty much known to work as expected
with a /64 subnet.  Anything broken with a /64 is really broken and the
vendor would be expected to get right on it.  If something breaks while
using a /127, the doctor might tell you to stop sticking the spoon in
your eye.




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