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Cell Relay Retreat>List Archive>month:1996-Mar> msg00174



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EE Times on IP over ATM

  • From: onvural@vnet.ibm.com
  • Date: Tue, 26 Mar 96 13:15:03 EST

*** Resending note of 03/26/96 10:43                                           
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 From:                                                                         
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Subject: Re: EE Times on IP over ATM                                           
                                                                               
The second would be more "frame-oriented" ATM switches, giving the             
advantages                                                                     
of "cut through" while allowing merging of input VCIs onto one output VCI      
(without cell-interleaving; by keeping state).  This goes a long way to        
solving the scaling problem (with or without RSVP), but i don't know o   f any 
announced ATM switches with this behaviour.                                    
                                                                               
>this is what i have been thinking too as a possible solution.  we             
>already have switches that keep state when they do early packet discard.      
>with similar logic it would be possible to schedule cells out from those      
>incoming vcis that already have full frames in the (shared memory)            
>buffer.  that would allow implementing mp-p without an application (=ip)      
>layer multicast server.juha                                                   
                                                                               
   As have been discussed a number of times before, this is the                
   most trivial way of immitating IP framed based features over                
   ATM and simplest to implement. Solves a lot of problems and                 
   has minor disadvantages only. Can also be done at the multicast             
   servers very easily solving more problems than it introduces.               
   Raif