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Traffic "appearance" on an ATM/LANE network--Frame/Cell

  • From: bdonalds <bdonaldsNObdSPAM@hotmail.com.invalid>
  • Date: Fri, 21 Apr 2000 08:49:05 -0700
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  • Organization: http://www.remarq.com: The World's Usenet/Discussions Start Here
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I am a bit confused as to the way ATM switches handle or
see traffic in a LANE environment.  My understanding (in my
particular architecture) is that as frame traffic reached
the ingress switch, a SAR is performed, and the traffic
proceeds into the cloud as cell traffic, which then gets
SARed again at the egress switch, and proceeds to the end
device as frame.  (assuming both nodes are on the same
ELAN)  My question is, what then are the configuration
settings on pure ATM switches regarding frame size/buffer,
MTU etc reflecting?  Wouldn't everything in the ATM cloud
be a 53 byte cell?  What concept am I not grasping?


              |<-------ATM Cloud------->|
   X---Eth---X--ATM--X---ATM---X---ATM---X---Eth---X
Host A    switch   switch    switch    switch    Host B
        (ingress)                     (egress)


Thanks,

Bryan





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