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Re: IP-Internets
- From: jeanlou.dupont
- Date: Fri Oct 15 09:53:37 1999
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
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