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Cell Relay Retreat>List Archive>month:2001-Mar> msg00031



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Re: CR: Collision avoidance/detection for atm??

  • From: Afroz Lateef <afroz.lateef@fnc.fujitsu.com>
  • Date: Wed, 14 Mar 2001 08:22:09 -0600
  • Organization: Fujitsu Network Corporation

The calls are setup on a first come first served basis. (I guess this is rather vednor dependent).
But since the resources (at the device driver and chip level) have to be provisioned by the Stack,
more commonly this is done on a first come first serve basis.
I guess you may be confused in the number of SVC connections that the Node may be able to process.
Say the calls can be established of upto 50 per second. And say the capacity of the link is OC12, then as long as CAC permits and the resources are available, the calls can keep getting established until the resources (BW, QoS, VPI/VCI) are no longer available.
This can mean 4K connections or 64K connections (again this is based upon the implementation).

Afroz Lateef

Steven Lau wrote:

> Hi,
>
> In ATM, if every station sends message to one destination (e.g. router).. then how would atm prioritize which station can setup the call connection first (using SVC)??.. if every station were to queue up and wait until the other releases its connection, how would the delay affect the entire network??..
> In ethernet, CSMA/CD is used. What bout in ATM??
>
> thank you very much.
>
> Regards,
> Steven
> gunnerstkd@mailcity.com
>
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