D.max and FDDI configuration

Article View: comp.dcom.lans.fddi

Article #164

Back to comp.dcom.lans.fddi Previous Next

#164

From: murakami
Date: Thu, 03 Sep 1992 23:58

20 lines
1184 bytes

Hello,

I have a question about FDDI limits in its configuration. FDDI
spec assumes D_max(ring latency) is 1.617ms as a basis to define
various parameters. It allows up to 1000 physical links and 200km
fiber length. (200 * 5085ns + 1000 * 600ns) In the case of dual
ring, it allows up to 500 physical links and 100km.

So, here is my question. If we have a small number of nodes
compared to the assumed (1000 links), it seems we can have longer
distance than 2000km. Is it right? I'm confused by the relationship
between D_max and allowed variance of FDDI configuration.

Thanks in advance.

-Ken

Ken Murakami
NTT Laboratories
Tokyo, Japan

Technical Details

Message-ID: <48073410@Vanadium.NTT.JP>

Path:

arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!sun-barr!sh.wide!wnoc-tyo-news!ccut!wsclark!lab!murakami.V

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!sun-barr!sh.wide!wnoc-tyo-news!ccut!wsclark!lab!murakami.V
From: murakami@ntt-20.ntt.jp
Newsgroups: comp.dcom.lans.fddi
Subject: D.max and FDDI configuration
Message-ID: <48073410@Vanadium.NTT.JP>
Date: 3 Sep 92 23:58:02 GMT
Sender: news@lab.ntt.jp
Reply-To: murakami@ntt-20.ntt.jp
Distribution: comp
Organization: NTT Basic Research Laboratories NUE Group
Lines: 20
Posting-Front-End: TAO/ELIS Znews, Version 0.13, 9-May-91; Vanadium.NTT.JP