From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Tue Dec 17 2002 - 14:11:42 GMT-3
At 10:18 PM +0800 12/17/02, Fan Shan wrote:
>?How to decide the metric value? Is that very important?
>I feel on most cases that you can decide it as you wish, do I need
>to calculate precisely ? and if so,how can I calculate it? Can
>someone give some docs on it?
>.
What protocol?
What routing policy are you trying to enforce?
Is it a hierarchical network?
In other words, what problem are you trying to solve? Most commonly,
metrics in modern protocols are based on bandwidth, but there can be
good reasons to assign less than the physical bandwidth. They may be
delay based. They may reflect completely administrative values to
prefer certain circuits independent of bandwidth.
Now, in real networks rather than the lab, the hierarchy is often
more important than the metric.
.
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