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Cell Relay Retreat>List Archive>month:1998-Jun> msg00083



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Re: failure detection & delay

  • From: "Scott Brunstrom" <sbrunstr@fore.com>
  • Date: Fri, 12 Jun 1998 15:14:13 -0400

Some workstation to switch failures can be detected very quickly.  Sonet LOS
is one for example.

Also, some switches use OAM cells to report failures which also are detected
quickly.


| Scott Brunstrom            |
| Federal Systems Engineer   |
| FORE Systems Federal, Inc. |



Kyoung-Joo,Yi wrote in message <3580CD17.21E@netdelta.sogang.ac.kr>...
>Hi,
>
>If hardware failure occures,it can be detected very fast.
>But logical failures(for example, workstation(destination) is down or
>abnormal.
>Link between ATM switch and workstation is normal.),it cannot be
>detected rapidly
>like hardware failure
>
>>Is it possible that logical failures occur in ATM switch?
>
>Transfer delay consists of queueing delay and fixed delay(propagation
>and processing...).
>I know that the large amount of transfer delay is queueing delay in ATM
>networks.
>
>>Is it reasonalbe that transfer time between destination and
switch(destination attached to)
>is very short compared with transfer delay of network?
>
>Thank you for reading my questions.  Any comment help me.