nanog mailing list archives
Re: NAP/ISP Saturation WAS: Re: Exchanges that matter...
From: "William Allen Simpson" <wsimpson () greendragon com>
Date: Fri, 20 Dec 96 17:00:32 GMT
From: Jim Van Baalen <vansax () atmnet net> I have a question that fits this topic. Why does everybody seem to be so sold on Gigaswitch based Xchange points?
A pretty good reason: it worked a lot better than everything else tried! As a bit of history, the only NAP that worked was with ethernet, which seemed a lot faster to most folks than the T1 links coming into the NAPs. But, the implementation was terribly flaky as a MAN technology. Then, ethernet got too congested, and folks moved to FDDI. Then, FDDI got congested and GigaSwitches were put in. They were the only thing available, and they made everything work better. My guess is that the next step will toss the LAN/MAN model for exchange GigaRouters directly connected by OC-3c/STM-1 and OC-12c/STM-4 WAN links -- but that's only a guess. It seems to be working. We are driven by things that actually work.
Based on membership and traffic it appears that there is still a stigma associated with Xchanges (PBnap and AADS for example) that have chosen different architectures. It was also my impression that people were much more critical of these "other" NAPS at the recent NANOG than SprintNAP and the MAEs.
That's because the ATM NAPs were started at the same time as MAE-East, but didn't work! They all took more than an extra year to get working. Oh, yeah, they cost a lot of money for some projects that really couldn't afford it, and it all went down the drain. Folks have a tendency to be critical of stuff with a history of failure.
In addition, with new line cards due out early next year, the BPXs will support ABR and, relatively speaking, huge buffers at high density OC3 and 2 port OC12.
Well, since they don't exist, why would anyone bank on deploying them? Let us know how well they work in a year or two. Meanwhile, PPP/SONET has been deployed for over 6 months at these speeds, and we are already getting experience with it. Yep, needs bigger buffers on those Ciscos, and PMC-Sierra didn't follow the SONET spec exactly, but ... experience is a much better teacher than promises. WSimpson () UMich edu Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32 BSimpson () MorningStar com Key fingerprint = 2E 07 23 03 C5 62 70 D3 59 B1 4F 5E 1D C2 C1 A2 - - - - - - - - - - - - - - - - -
Current thread:
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter..., (continued)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Alec H. Peterson (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... David Schwartz (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Nathan Stratton (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 19)
- RE: NAP/ISP Saturation WAS: Re: Exchanges that matter... David Schwartz (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Jim Van Baalen (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... alex (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Jim Van Baalen (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... alex (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Jim Van Baalen (Dec 20)
- Re: NAP/ISP Saturation WAS: Re: Exchanges that matter... Tony Li (Dec 20)