More likely everyone bought IRUs out of the same ILEC’s single cable. Or they just all go through the same single raceway to enter the building, etc.
-Ben. - Ben Cannon, AS15206 > On Dec 19, 2018, at 9:41 AM, Rod Beck <rod.b...@unitedcablecompany.com> wrote: > > Some of it is due to lazy buyers purchasing two IP ports from distinct > companies without considring that two ports both located at the site are > vulnerable to shared risers or entrance facilities. > > - R. > > > From: NANOG <nanog-boun...@nanog.org <mailto:nanog-boun...@nanog.org>> on > behalf of Mike Hammett <na...@ics-il.net <mailto:na...@ics-il.net>> > Sent: Wednesday, December 19, 2018 3:12 PM > To: Mehmet Akcin > Cc: nanog@nanog.org <mailto:nanog@nanog.org> > Subject: Re: How to choose a transport(terrestrial/subsea) > > If people start spot-checking this stuff more regularly, perhaps the > companies being verified will take delivering the correct product the first > time more seriously. > > Some of it boils down to a lack of data quality about what they actually have. > > > > ----- > Mike Hammett > Intelligent Computing Solutions <http://www.ics-il.com/> > <https://www.facebook.com/ICSIL> > <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> > <https://www.linkedin.com/company/intelligent-computing-solutions> > <https://twitter.com/ICSIL> > Midwest Internet Exchange <http://www.midwest-ix.com/> > <https://www.facebook.com/mdwestix> > <https://www.linkedin.com/company/midwest-internet-exchange> > <https://twitter.com/mdwestix> > The Brothers WISP <http://www.thebrotherswisp.com/> > <https://www.facebook.com/thebrotherswisp> > <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> > From: "Mehmet Akcin" <meh...@akcin.net <mailto:meh...@akcin.net>> > To: "James Breeden" <ja...@arenalgroup.co <mailto:ja...@arenalgroup.co>> > Cc: nanog@nanog.org <mailto:nanog@nanog.org> > Sent: Tuesday, December 18, 2018 12:17:42 PM > Subject: Re: How to choose a transport(terrestrial/subsea) > > That's a great example. Thank you James for sharing. I have done so many > "GROUND TRUTH" visits where randomly selected certain physical points to > validate physical diversity. Have seen several places where dual risers in > the building were present or multiple building entries were available but not > used. Ground truth events are certainly important and can be eye opening. It > does not necessarily scale as you can't really walk all the fiber A-Z > everywhere.. i know. > > On Tue, Dec 18, 2018 at 6:49 AM James Breeden <ja...@arenalgroup.co > <mailto:ja...@arenalgroup.co>> wrote: > I can't stress enough the importance of controlling your own route and even > cable diversity. Require KMZs of the routes for any services you take > (especially single path Wave type services). Put them in the contracts if you > can. > > I've had at least 1 situation where we had vendor diversity and what was > supposed to be route diversity- 3 separate waves coming south and southeast > out of a datacenter to 3 separate cities. Imagine my surprise when we took a > outage one day that severed all 3 circuits. Yes all 3 circuits, going to 3 > separate cities, on 3 separate carrier/s DWDM platforms, all happened to show > up in the same sheath of cable at one location that happened to experience > backhoe fade. Was not a good day.... > > > James W. Breeden > Managing Partner > > > Arenal Group: Arenal Consulting Group | Acilis Telecom | Pines Media > PO Box 1063 | Smithville, TX 78957 > Email: ja...@arenalgroup.co <mailto:ja...@arenalgroup.co> | office > 512.360.0000 | cell 512.304.0745 | www.arenalgroup.co > <http://www.arenalgroup.co/> > From: NANOG <nanog-boun...@nanog.org <mailto:nanog-boun...@nanog.org>> on > behalf of Brandon Martin <lists.na...@monmotha.net > <mailto:lists.na...@monmotha.net>> > Sent: Monday, December 17, 2018 4:59:44 PM > To: nanog@nanog.org <mailto:nanog@nanog.org> > Subject: Re: How to choose a transport(terrestrial/subsea) > > On 12/17/18 3:51 PM, Mehmet Akcin wrote: > > > > One question, how much people care about vendor diversity? I do and did > > care. I don’t want to put all my eggs in one basket. Do you care? Thank you > > There are advantages and disadvantages to vendor diversity. > > As advantages, you won't be subject to complete loss of connection > because of a single dispute or provisioning/control plane issue with > that one vendor. You can also more easily pit vendors against each > other for pricing if you are already vendor-diverse. > > As a disadvantage, not only does vendor diversity obviously not imply > route diversity, but it will completely put the onus on you to ensure > route diversity if you want it. With a single vendor, you can demand > that your circuits have route diversity and, assuming you trust them, > they have all the information they need to make that happen for you. > -- > Brandon Martin
