The MPLS-OPS Archive

["Tarek Gad" <tgad2000@hotmail.com>]

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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