Solved

ATM calculations

Posted on 2003-12-01
5
2,663 Views
Last Modified: 2013-12-14
I am trying to wrap my head around some ATM calculations.

transfer burst <= 7 frames
1 frame = 2048 bytes of data
mean time between bursts = 80ms
bandwith required = 2.048 Mbps

calculate:
peak cell rate
maximum burst size
sustainable cell rate
0
Comment
Question by:Genet
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
5 Comments
 
LVL 5

Expert Comment

by:ZiaTioN
ID: 10678859
I wrote a small perl script to convert from ATM cells to IP packets and vise versa. You can find that program at http://www.perlskripts.com/scripts/converter/IP-2-ATM . That should help you with your issues. I also wrote a command line one designed to run on any Unix.Linux machine if that would better serve your purpose. I used Tk for the gui building on this one so it will run on any platoform that runs perl.

Basically all you need to do is calculate the Peak Cello Rate then you can adjust for Sustained Cell Rate and Mximum Burst Size yourself. For an IP bandwidth of 2.048 MB/s that would equate to 4,830 cps (Cells Perl Second) PCR. That is your max data transfer to set your SVC or SPVC for. Now for SCR usually around 80% of your PCR is a good percentage to go with. so around 3,500 cps for SCR maybe even 4,000 if you want to go a little higher. As for MBS you will usually set this to 50 no matter what the data transfer is. The Max Burst Size is simply the amount of cells you will allow to burst at PCR. So if your SVC burst from SCR to PCR you tell your circuit to allow this for 50 cells and then to back it back down.
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 11093684
PAQed - no points refunded (of 20)

Computer101
E-E Admin
0
 
LVL 5

Expert Comment

by:ZiaTioN
ID: 11101796
Hmm, it seems that maybe the only person who answered the question should have recieved the points. I would have posted this objection sooner but was unaware of the status of the question.
0
 
LVL 5

Expert Comment

by:ZiaTioN
ID: 12086212
I must update the link above. I have since moved the script being referenced and you can no longer find it at the link above. The new location is: http://www.perlskripts.com/cgi-bin/showscript.cgi?IP-to-ATM=show
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

    Over the past few years, small business and home owners have become so dependent on internet that a need for redundancy has arisen.    What happens when your small business or home / home office loses its internet connection?  The results c…
Sometimes you have to pull out old tricks to get a new firewall to work… While we were installing a new Sonicwall at a customers site we found that sites they were able to visit before were not working.  It seemed random and we could not understa…
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
Suggested Courses

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question