Re: First step of network optimization

[Valdis.Kletnieks () vt edu]

On Sun, 02 Oct 2005 15:47:22 +0800, Joe Shen said:

> Is there a common sense on the target of network
> optimization? or is there common startup line of such
> work? What should be the model of a optimized ISP
> network ( or PoP site) ? 

You want to optimize for the lowest monetary cost network that still allows you
to meet all the SLA's you've negotiated.  And this depends on what you
negotiated - for instance, if the SLA specifies 3 9's of reliability, spending
money to build a 4 9's network is cutting into your profits.  Of course, if the
SLA's are biased towards latency or bandwidth, you'll have to consider those.

And remember that there usually isn't one right answer for anything but the
most simple problems - almost always, some constraint will be placed on the
solution. Often it's of the form "The salesdroid just promised XYZ", also known
as the "Don't let your mouth write no check your router can't cash" syndrome.
If it isn't that, it's a financial issue inside the company - there's always the
network you *want* to build, which is almost never the network that your
revenue stream will allow you to build....

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