Re: Using /31 for router links

[Chris Costa <ccosta () cenic org>]

We recently did a backbone router upgrade and the vendor surprisingly  
didn't support /31's.  We had to renumber all those interconnects and  
peering sessions to /30's.  That wasn't fun!


On Jan 22, 2010, at 4:53 PM, Seth Mattinen wrote:

> Joe Provo wrote:
> > On Fri, Jan 22, 2010 at 04:08:28PM -0800, Seth Mattinen wrote:
> > > In the past I've always used /30's for PTP connection subnets out  
> > > of old habit (i.e. Ethernet that won't take unnumbered) but now  
> > > I'm considering switching to /31's in order to stretch my IPv4  
> > > space further. Has anyone else does this? Good? Bad? Based on the  
> > > bit of testing I've done this shouldn't be a problem since it's  
> > > only between routers.
> > rfc3021 is over 9 years old, so should be no suprise that it works  
> > well.  :-)
>
>
> I'm never surprised anymore by something that should work turning  
> out to have some obscure quirk about it, so I figured it was worth  
> asking. ;)
>
> ~Seth