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Cell Relay Retreat>MPLS-OPS Archive>month:2001-Jun> msg00371



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RE: ATM Label stack processing

  • From: "John Black" <john_black66@hotmail.com>
  • Date: Thu, 28 Jun 2001 11:39:07 -0000
  • Resent-Date: Thu, 28 Jun 2001 08:37:36 -0400
  • To: javier.antich@telindus.es, mpls-ops@mplsrc.com
  • X-OriginalArrivalTime: 28 Jun 2001 11:39:07.0753 (UTC) FILETIME=[F0F46590:01C0FFC6]
  • X-Originating-IP: [212.111.64.89]



>
>ATM-LSRs have routing intelligence, that it, they have IP addresses, run 
>IGP
>routing protocol (OSPF, ISIS) and run a label distribution protocol (i.e.
>LDP). By means of the IGP and the Label Distributio Protocols they know
>where to send each cell comming with a certain VPI/VCI pair, and swaping it
>to which VPI/VCI pair. That is the only thing they do, no matter if there
>are other labels inside the frame.
>
1.Does it mean that i cannot perform source routing of ATM cells since
ATM LER will compute the route over ATM cloud by itself?
2.What about seting up end-to-end TE tunnel?
Will my RSVP-TE path msg end up at ingress ATM LER, which will initiate its 
own TE setup over MPLS cloud that I cannot control?

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