nanog mailing list archives
Re: MCI [ATM overhead]
From: Wolfgang Henke <wolfgang () whnet com>
Date: Wed, 20 Mar 1996 08:38:08 -0800 (PST)
johnc () msc edu (John Cavanaugh) writes:
You can find a paper that addresses this question at http://www.msci.magic.net/docs/magic/overhead.ps or fte:ftp.magic.net/pub/magic/overhead.ps It covers OC-3c, OC-12c, 100 and 140 Mbps TAXI, and DS3 framing, and gives the effective bandwidth at each layer.
Thank you for the reference. I will certainly check it out. Here is a little table which I hope will help ISPs planning to upgrade bandwidth: SONET (Synchronous Optical Network) speeds given in Mbps nominal w/o Sonet ATM TCP/IP overhead OC-3 STS-3c 155.520 149 122 137 future net backbone OC-12 STS-12c 622.080 599 488 549 OC-48 STS-48c 2488.32 2396 1953 2197 current telco backbone OC-192 STS-192c 9953.28 9585 7813 8788 on single mode fiber or multi mode fiber or CATV 75 ohm coax (the lower speeds) Additions and corrections are welcome. Wed Mar 20 07:56:41 PST 1996 http://www.whnet.com/wolfgang/sonet.html
John Cavanaugh EMail: johnc () msc edu Minnesota Supercomputer Center, Inc. johnc () cray com 1200 Washington Ave. S Phone: +1 612 337-3556 Minneapolis, MN 55415 FAX: +1 612 337-3400
Wolfgang Wolfgang Henke wolfgang () whnet com . http://www.whnet.com/wolfgang/ WH Networks ... ftp.whnet.com /pub/wolfgang 2672 Bayshore Parkway Suite 503 ....... +1 415 390 9316 Mountain View CA 94043 ................... fax +1 415 390 9317
Current thread:
- Re: MCI [ATM overhead] Jeff Ogden (Mar 19)
- Re: MCI [ATM overhead] Gordon Cook (Mar 19)
- Re: MCI [ATM overhead] Gary R Wright (Mar 19)
- Re: MCI [ATM overhead] Jim Forster (Mar 19)
- <Possible follow-ups>
- Re: MCI [ATM overhead] Paul Ferguson (Mar 19)
- Re: MCI [ATM overhead] Wolfgang Henke (Mar 19)
- Re: MCI [ATM overhead] John Cavanaugh (Mar 20)
- Re: MCI [ATM overhead] Wolfgang Henke (Mar 20)
- Re: MCI [ATM overhead] Paul Ferguson (Mar 20)
- Re: MCI [ATM overhead] Mark A. Luker (CISE/NCRI) (Mar 22)
- Re: MCI [ATM overhead] Vadim Antonov (Mar 20)
- Re: MCI [ATM overhead] Shikhar Bajaj (Mar 20)
- Re: MCI [ATM overhead] Tim Salo (Mar 20)
- Re: MCI [ATM overhead] Jon Zeeff (Mar 21)
- Re: MCI [ATM overhead] William Allen Simpson (Mar 21)
- Re: MCI [ATM overhead] Shikhar Bajaj (Mar 21)
- Re: MCI [ATM overhead] Shikhar Bajaj (Mar 21)
- Re: MCI [ATM overhead] Tim Salo (Mar 21)
(Thread continues...)
- Re: MCI [ATM overhead] Gordon Cook (Mar 19)