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I install and configure mrtg, now what do I need to do to use it to
collect data from switches/routers. Each time I ran it, it onl;y
display sample data. Thanks.

check out http://eradman.com/article/mrtg1

"Merv" <> wrote in message
news: oups.com...
> check out http://eradman.com/article/mrtg1
>

Or check PRTG, it's easier to use.

Did you defined any interface for data collection.