[ale] OT: Starting an ISP and analyzing capabilities...

[Drag0n]

some quick links found on searching google.

	
http://hsb.baylor.edu/ramsower/ais.ac.97/papers/elnicki.htm

	"so you want to become an ISP?"
http://members.colis.com/~jamaican/howtobeanisp.htm

these might be a ggod starting place.

Drag0n
dragon at atlantacon.org

On Sun, 2002-11-03 at 17:55, John Wells wrote:
> Guys,
> 
> I have a friend who owns a company that recently acquired a dedicated
> OC-12 SONET. He's considering starting an ISP with this bandwidth (and
> wishes to make it entirely linux based), and in passing
> asked me how to determine the users this could support.
> 
> I've never attempted at calculating network load like this, so I
> informed him that he'd be better off speaking with a network expert.
> 
> Either way, not knowing how to do this bothers me, and I'd still like to
> provide him with a rough estimate.  How would you go
> about calculating the total number of users this could support?  My
> feable attempt was to get the total capacity (listed in a book of mine
> as 594.43 Mbps user data), multiply by 1024 to get kbps, and then divide
> by 56 (assuming everyone connected at once and was using the full
> possible bandwidth allocated to them...56k).
> 
> This looks like:
> 594.43 * 1024 = 608696.32
> 608696.32 / 56 = 10869.58
> 
> This suggests that at any given time, the bandwidth could support 10,869
> users connected (and max'ing their connections) at 56k.
> 
> I know this is way too simplistic, so I ask anyone with experience in
> these matters to show me where I'm wrong and how to correctly derive the
> estimates.
> 
> Also, in typical ISP operations I'm sure they don't allocate 56k per user
> exclusively, rather it would seem they would allocate on demand, thereby
> freeing the unused bandwidth when user activity drops off.  Is this
> assumption correct?
> 
> Finally, are there any good books out there that cover this sort of
> analysis?  What about any books out there that would describe how to set
> up a modem bank and allow users to connect?
> 
> Thanks very much for your help.
> 
> John
> 
> 
> 
> 
> 
> 
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