The MPLS-OPS Archive

[Irwin Lazar <ilazar@mplsrc.com>]

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Irwin

At 09:12 AM 6/24/2001 -0700, Tarek Gad wrote:

>Hi,
>
>
>
>I was wondering if there is a news group for the different routing protocols.
>
>Thank you..
>
>Tarek
>
> >From: GAlmaalouf@aol.com
> >To: mpls-ops@mplsrc.com
> >Subject: general questions
> >Date: Sun, 24 Jun 2001 09:47:27 EDT
> >
> >
> >I am writting a paper about Goodput in the ATM network and I need some 
> help.
> >I am still confused with the concept of Frame and cell at the ATM level.
> >
> >In the ATM , all cells are of equal sizes (e.g., 53 bytes), but a given 
> frame
> >my contains many cells. The question is who decide how many cells a given
> >frame will have?. As an example can I say the following:
> >
> >Let's assume we are sending 1Mbps from one point to the other through 
> the ATM
> >network. Are we saying that 1Mbps/53 bytes is the size of the data 
> stream at
> >any given ime, or the ATM switch may put several cells and call them frame?
> >
> >if this is possibel what is the maximum size of the frame (how many 
> cells can
> >we put in a frame)?
> >
> >Who determine the sizes of the frame?
> >
> >I was told that EPD/PPD would help the ATM network in the case of 
> congestion,
> >but also this mechanism will help frame integrity, becuase if a cell is
> >corrupted in a given frame, the whole frame has to be retransmitted and 
> this
> >would created more traffic and more congestion in the network.
> >
> >However, I am unable to find information to confirm what is the frame size,
> >we only know that the cell size is 53 bytes.
> >
> >If any one could help.
> >
> >million thanks to all.
> >
> >Best Regard,
> >
> >Jamil
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
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