[25495] in North American Network Operators' Group
Re: IP-Internets
daemon@ATHENA.MIT.EDU (jeanlou.dupont@na.marconicomms.com)
Fri Oct 15 09:51:36 1999
From: jeanlou.dupont@na.marconicomms.com
To: Alan Hannan <alan@globalcenter.net>
Cc: nanog@merit.edu
Message-ID: <8525680B.00441D15.00@notes.relteccorp.com>
Date: Fri, 15 Oct 1999 08:24:58 -0400
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BTW, the vast majority of SONET/SDH equipments achieve sub-50ms path protection
switching. (Requirement in BellCore/Telcordia states that SONET equipment must
detect a failure within 10ms and perform protection switching in no more than
50ms.)
Also, the mechanisms by which fast restoral happens in MPLS are usually tied to
SONET/SDH signals like:LOS (Loss Of Signal) and SD/SF (Signal Degrade/Signal
Fail).
cheers.
jld.
Alan Hannan <alan@globalcenter.net> on 10/14/99 07:27:06 PM
To: Bulent Yener <yener@research.bell-labs.com>
cc: nanog@merit.edu (bcc: Jeanlou Dupont/RMQ/RELTECCORP)
Subject: Re: IP-Internets
3 bits of clarification:
> Some stick MPLS in the middle ala IP/MPLS/HDLC or IP/MPLS/SONET.
This was dumb. I meant, ala IP/MPLS/HDLC or IP/MPLS/PPP.
A couple of folks mailed me to state that MPLS as a transport
technology was in the future, isn't it? In fact, 2 networks
including our own have deployed large [mostly ubiquitous]
MPLS deployments, where most traffic runs on it, one all over,
another in certain regions/areas.
Finally, I was 'reminded' that MPLS convergence will actually
surpass SONET w/ restoral times, on the order of << 50 ms. Really
real soon now.
-alan
