nanog mailing list archives
Re: IPv6: numbering of point-to-point-links
From: Tim Durack <tdurack () gmail com>
Date: Tue, 25 Jan 2011 10:25:56 -0500
On Tue, Jan 25, 2011 at 9:44 AM, Lasse Jarlskov <laja () telenor dk> wrote:
Thank you all for your comments - it appears that there is no consensus on how this should be done.
The best piece of advice I received when asking similar questions in the past is to allocate a /64 for every network regardless of it's potential size. Loopbacks, point-to-point, hosting VLANs etc. Then assign whatever size you are currently comfortable with. We've used /128s for loopbacks, safe in the knowledge that we can expand them all to /64s without renumbering (in case someone comes up with a good idea why /64s on loopbacks are necessary.) We've gone unnumbered on point-to-points, as a way of deferring that particular decision. Admittedly this reduces useful diagnostics available from traceroutes, although I quite like seeing loopbacks in traceroutes anyway. Unnumbered does reduce control-plane address space surface, which might be seen as a useful benefit (I'm sure someone will tell me why that's a bad idea.) My point is, if you do your number plan right, you should have some flexibility to make changes in the future without pain. -- Tim:>
Current thread:
- Re: IPv6: numbering of point-to-point-links, (continued)
- Re: IPv6: numbering of point-to-point-links Blake Hudson (Jan 31)
- Re: IPv6: numbering of point-to-point-links Randy Bush (Jan 31)
- Re: IPv6: numbering of point-to-point-links Gary Buhrmaster (Jan 31)
- Re: IPv6: numbering of point-to-point-links Seth Mattinen (Jan 31)
- RE: IPv6: numbering of point-to-point-links Ronald Bonica (Jan 24)
- Re: IPv6: numbering of point-to-point-links Skeeve Stevens (Jan 24)
- Re: IPv6: numbering of point-to-point-links Skeeve Stevens (Jan 24)
- Re: IPv6: numbering of point-to-point-links Ray Soucy (Jan 24)
- Re: IPv6: numbering of point-to-point-links ML (Jan 26)
- Re: IPv6: numbering of point-to-point-links Lasse Jarlskov (Jan 25)
- Re: IPv6: numbering of point-to-point-links Tim Durack (Jan 25)