[COLUG] Ethernet monitoring tools

[Scott Merrill]

Jody McCluggage said:
> Hello all,
>
> I know this may be a little off topic.  I am looking for a good Ethernet
> monitoring tool.  I know Etherpeek is usually highly recommended
> (although it is a little pricey).  Does anyone have any suggestions or
> recommendations?  I am looking for something that runs on either Linux
> or Windows (or both).

The usual suspects I see mentioned are:
http://www.snort.org/
http://www.ethereal.org/
http://etherape.sourceforge.net/

I'm not familiar with Etherpeek -- does it do something that these three
don't/can't?