[c-nsp] OC3 Throughput

[Garry]

Paul Stewart wrote:
> A few people hit me offline stating that it's not nice to hold back the
> answers and that they were curious... right you are - sorry about that...;)
> 
> The general answer has been 110-120Mb/s considering ATM overheads etc. on a
> 5 minute graph average - beyond that you are really pushing your luck.  We
> have one such circuit today that is hitting 110 regularily and sometimes
> hits 120 for short peaks - my concerns are now staring at me on a graph....

In general (at least speaking from an ISP's point of view) when
utilizing a link beyond 90% peak or beyond 75% average, it's time to
upgrade ... otherwise it's just a question of time when the link
capacity is causing quality degradation for the users ... (unless the
peaks are caused by batch-only traffic).

Take the usage graph to your boss and tell him you need another link or
an OC12 upgrade ;)

-garry