IPv6 Newbie

Wed Apr 7 15:13:18 UTC 2010

Ricky Beam wrote (on Apr 06):
> On Tue, 06 Apr 2010 03:20:26 -0400, shake righa <ssrigha at gmail.com> wrote:
> >Can one subnet to include /127 for point to point connections?
> 
> That's the equiv of a /31 in IPv4.  Do you use /31's for p-t-p links
> in your IPv4 network(s)?
> 
> (Yes, I've used /31's before, but only to represent 2 /32's.  And
> even that was silly.)

We use /31 (v4) and /127 (v6) for internal PtPs in our mostly-vendor-C network with no special tweaks or odd behaviour. YMMV.

There was a talk at the Austin NANOG on this. I asked the audience in a straw-poll what their PtP v6 netmask preferences were - resoundingly audience support was for /127's.

Chris.