nanog mailing list archives
Re: Flexible OTN / fractional 100GbE
From: "Radu-Adrian Feurdean" <nanog () radu-adrian feurdean net>
Date: Fri, 31 May 2019 10:00:32 +0200
On Thu, May 30, 2019, at 09:41, Jérôme Nicolle wrote:
Yup. Should it hard-drop ? Buffer ? Both are unthinkable in OTN terms (is that a cultural thing ?). It's what packet networks are made for. And that's why an alien device, with support for Ethernet, OTN and programmable pipelines, could bridge the gap, allowing for a more efficient use of optical bandwidth.
Hi Jerome, When you buy the kind of services that end-up being delivered on OTN, you expect to have a capacity that is dedicated to you, and only to you, and if you don't "use" it nobody else will. And you agree with the constraints that come with that (not protected, or protection is an extra paid option). Than comes the fact that Ethernet is *NEVER* "fractional". It is either 0 (ZERO) or line-rate. It's the amount (in time) of ZERO present over several microseconds (often "several" == "several millions") that gives (by doing an average) the "sub-rate" bandwidth. So no, hard-drop or buffer on OTN are not only "cultural issues", their absence is technically part of the OTN promise. If you are willing to accept to share unused bandwidth, then MPLS based services are the way to go, and you have that choice in a vast majority of the cases. You loose the hard guarantee of bandwidth availability and you usually get some trace of jitter.
Current thread:
- Flexible OTN / fractional 100GbE Jérôme Nicolle (May 28)
- Re: Flexible OTN / fractional 100GbE Jason Lixfeld (May 28)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 28)
- Re: Flexible OTN / fractional 100GbE Brandon Martin (May 29)
- Re: Flexible OTN / fractional 100GbE Mitcheltree, Harold B (May 29)
- Re: Flexible OTN / fractional 100GbE Brandon Martin (May 29)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 30)
- Re: Flexible OTN / fractional 100GbE Brandon Martin (May 30)
- RE: Flexible OTN / fractional 100GbE adamv0025 (May 31)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 31)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 28)
- Re: Flexible OTN / fractional 100GbE Radu-Adrian Feurdean (May 31)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 31)
- Re: Flexible OTN / fractional 100GbE Jason Lixfeld (May 28)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 29)
- Re: Flexible OTN / fractional 100GbE Tom Hill (May 29)
- Re: Flexible OTN / fractional 100GbE Jérôme Nicolle (May 29)