Max performance ATM OC3

mmasis · ‎05-15-2008

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

Is 155Mbps?

Thanks in advance!

paolo bevilacqua · ‎05-15-2008

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!

mmasis · ‎05-16-2008

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!

paolo bevilacqua · ‎05-16-2008

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.

mmasis · ‎05-19-2008

Thanks for the attached file is very helpfull.