tlug: WAN network traffic measurment

["Andrew S. Howell" <andy@example.com>]

Hello,

	Does anyone know of a tool that will summarize network
traffic? In particular, I want to find out what makes up the traffic
going through a certain router.

I can get a _very_ rough idea with:

tcpdump gateway my-router

What I would like is something that shows a graph of traffic broken
down by various protocols over some specified time frame. Any ideas?

Thanks,

	Andy
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