nanog mailing list archives

Re: Using /31 for router links


From: "Tony Varriale" <tvarriale () comcast net>
Date: Fri, 22 Jan 2010 19:23:15 -0600

Shouldn't be any issues...it's 2010 :)

And, your IP allocation utilization will love you.

tv
----- Original Message ----- From: "Seth Mattinen" <sethm () rollernet us>
To: "nanOG list" <nanog () nanog org>
Sent: Friday, January 22, 2010 6:08 PM
Subject: Using /31 for router links


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.

~Seth



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