nanog mailing list archives
Re: Using /31 for router links
From: Florian Weimer <fw () deneb enyo de>
Date: Sat, 23 Jan 2010 11:06:34 +0100
* Seth Mattinen:
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?
Bad. For some systems, such tricks work to some degree only due to lack of input validation, and you get failures down the road (ARP ceases to work, packet filters are not applied properly and other fun). And now is not the time to conserve address space. You really should do everything you can to justify additional allocations from your RIR.
Current thread:
- Re: Using /31 for router links, (continued)
- Re: Using /31 for router links Nathan Ward (Jan 22)
- RE: Using /31 for router links George Bonser (Jan 22)
- Re: Using /31 for router links Nathan Ward (Jan 22)
- Re: Using /31 for router links Joe Provo (Jan 22)
- Re: Using /31 for router links Seth Mattinen (Jan 22)
- Re: Using /31 for router links Chris Costa (Jan 22)
- Re: Using /31 for router links Jens Link (Jan 23)
- RE: Using /31 for router links Erik L (Jan 22)
- Re: Using /31 for router links Seth Mattinen (Jan 22)
- Re: Using /31 for router links kris foster (Jan 22)
- Re: Using /31 for router links Richard A Steenbergen (Jan 22)
- Re: Using /31 for router links Tony Varriale (Jan 22)
- Re: Using /31 for router links Florian Weimer (Jan 23)
- Re: Using /31 for router links Tony Varriale (Jan 23)
- Re: Using /31 for router links Florian Weimer (Jan 23)
- Re: Using /31 for router links Jens Link (Jan 23)
- Re: Using /31 for router links Tony Varriale (Jan 23)
- Re: Using /31 for router links Michael Sokolov (Jan 22)
- Re: Using /31 for router links Mark Smith (Jan 22)
- Re: Using /31 for router links Stephen Sprunk (Jan 23)
- Re: Using /31 for router links Michael Sokolov (Jan 23)
- RE: Using /31 for router links Erik L (Jan 23)
- Re: Using /31 for router links Robert Glover (Jan 23)
- Re: Using /31 for router links Brielle Bruns (Jan 23)