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Community Member

Max performance ATM OC3

What's the max performance an ISR 3800 can get with an ATM OC3 module?

Is 155Mbps?

Thanks in advance!

4 REPLIES
Hall of Fame Super Gold

Re: Max performance ATM OC3

First of all, you have atm overhead, makes a 155 mbps to be really 120 mbps or so.

http://sd.wareonearth.com/~phil/net/overhead/

Secondly, a 3845 might get close to max circuit utilization, but with significant CPU usage.

A 3825 would probably melt much before.

hope this helps, please rate post if it does!

Community Member

Re: Max performance ATM OC3

I really appreciate your effort, but i found it in a presentation on CEC; ISR are CPU based so it could reach higher performance, but basically the answer was yes.

Thanks!!! have a greate weekend!

Hall of Fame Super Gold

Re: Max performance ATM OC3

Here's attached "your" official numbers.

As you see for smaller packet size linerate cannot be reached. So in general don't count on a 3825 to be able "to fill the pipe" and still have CPU to spare. It won't.

Community Member

Re: Max performance ATM OC3

Thanks for the attached file is very helpfull.

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