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Cell Relay Retreat>MPLS-OPS Archive>month:2002-Nov> msg00101



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ATM and MPLS

  • From: "JACK RODRIGUEZ" <jack_r33@hotmail.com>
  • Date: Wed, 27 Nov 2002 15:09:21 +0000
  • Resent-Date: Wed, 27 Nov 2002 11:41:07 -0500
  • To: mpls-ops@mplsrc.com
  • X-OriginalArrivalTime: 27 Nov 2002 15:09:21.0791 (UTC) FILETIME=[F71298F0:01C29626]
  • X-Originating-IP: [198.26.119.84]

I have been doing a lot of reading on MPLS and how it would fit into a network and I have yet to figure out concrete advantages over ATM.  It seems that it is trying to do everything ATM already does.  Okay, so MPLS can do VPNs but so does ATM (LANE).  Traffic Engineering = SPVCs/Virtual circuits.  It seems that ATM could use some enhancements to make it better but why use MPLS?  Why not enhance ATM switches to listen to ISIS-TE/OSPF-TE information and map new virtual circuits as needed?  In other words, why not enhance ATM?  The only disadvantage in ATM is the SAR process (fastest sar processor is OC-192).  I don't want to start a debate, but I am looking for justification for why a carrier should go to MPLS?  Instead of looking at multiservice routers/switches and look for enhancements to ATM (work with our vendors to make ATM switches smarter).  M! aybe I'm missing something....Thanks

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