You can try ipcad,
i use it for quite some time, and it works very good.
It emulates a cisco router ip accounting, and you can query it's data
with rsh as you can do this with a cisco.
It has also "show interface ***", which gives 5 minute interval averages,
packet and byte counters.
The only problem is that i've never tested it under netbsd.
But after it works flawlesly under free&open and linux it should work under
net too.

--
Cheers,
Niki

----- Original Message -----
From: "Erik E. Fair" <fair@clock.org>
To: <tech-net@netbsd.org>
Sent: Wednesday, March 05, 2003 8:19 AM
Subject: NetBSD & router metrics


> I'm using an Alpha PC164 with two Adaptec ANA-62044 quad 10/100
> Ethernet interfaces as a router. A fine little box, so far.
>
> One frustration I have is the lack of tools (so far as I have been
> able to find) that will tell me what the instantaneous bandwidth
> consumption is through each interface, e.g. similar to what the Cisco
> "show interface" command shows. I know that we collect byte & packet
> counts per interface, so it should be a simple set of changes to
> netstat or systat to show bytes/sec or packets/sec measured over some
> interval (or since boot, since we do have the data...), plus error
> rates.
>
> Is this useful enough to the community at large that I should dive
> into either (or both) of those programs and write the code?
>
> surveying,
>
> Erik <fair@clock.org>
>