Using /31 for router links
Chris Costa
ccosta at cenic.org
Sat Jan 23 01:00:22 UTC 2010
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
>
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