nanog mailing list archives
Re: value of co-location
From: hwb () upeksa sdsc edu (Hans-Werner Braun)
Date: Sat, 20 Jan 1996 10:57:12 -0800 (PST)
Religious arguments aside, we are getting superb performance across the OC3 vBNS ATM network nationally for quite some time already, though big buffers had been architected in there from the beginning. Check on www.vbns.net and www.nlanr.net. Can't beat Jon's workstation performance yet, unless we talk about bandwidth*miles. ;) Then again, that may change some time as well. Stay tuned.
At 04:57 PM 1/19/96 -0800, Paul A Vixie wrote:... The telcos have really screwed the pooch with ISDN, SMDS, and ATM. I'm not sure why F-R has worked well without years of delay, but it's a real anomoly. I have little if any confidence that I will be able to buy OC3 speed ATM and use it to contact 200 (or even 20) metro-area NAP partners any time this century. ISP's who practice conservative engineering (i.e., safe sex) will continue to buy the fastest telco pipes they can get _among_those_which_actually_work_ and this is probably going to be raw fibre before it starts to be 155Mb ATM. I'm not in love with the idea of a barn full of routers all hooked up to a GIGAswitch milking machine, but I have to prefer the config that works.Religious arguments aside, the obstacle for TCP/IP performance over ATM has been due to two factors, small buffers and no explicit flow control. The new switches have large buffers. TCP works well with these switches. Explicit flow control will allow more flexible bandwidth management. That applies to TCP as well as ATM. Check out the price of an ATM circuit (considering overhead, etc) and if you perceive value for the BW then buy it. No apology needed, just purchase orders. :-) If you find that you prefer raw bandwidth over optical fiber and lots of cisco interfaces, fine, but if you like network level switching, shared network bandwidth and the price for that, buy switched services. --Kent
Current thread:
- Re: value of co-location, (continued)
- Re: value of co-location Dorian Kim (Jan 19)
- Re: value of co-location postel (Jan 19)
- Re: value of co-location Mike O'Dell (Jan 20)
- Re: value of co-location George H. Clapp (Jan 19)
- Re: value of co-location Andrew Partan (Jan 20)
- Re: value of co-location Warren K. Williams (Jan 20)
- Re: value of co-location Paul Ferguson (Jan 20)
- Re: value of co-location Dave Siegel (Jan 20)
- Re: value of co-location Nathan Stratton (Jan 20)
- Re: value of co-location Kent W. England (Jan 20)
- Re: value of co-location Hans-Werner Braun (Jan 20)
- Re: value of co-location Mike O'Dell (Jan 21)
- Re: value of co-location Joseph Lawrence (Jan 22)
- Re: value of co-location Bilal Chinoy (Jan 22)
- Re: value of co-location Stephen Stuart (Jan 22)
- Re: value of co-location Dennis Ferguson (Jan 21)
- Re: value of co-location Hans-Werner Braun (Jan 21)
- Re: value of co-location Dennis Ferguson (Jan 21)
- Re: value of co-location Fletcher Kittredge (Jan 22)
- Re: value of co-location Paul A Vixie (Jan 21)