In message <8C70C51D997FEC2-2E0-14FCC@mblk-r42.sysops.aol.com>, davef1624@aol.c
om writes:
>Are there any networking tools available (even 3rd party) that will 
>collect & display
>the tcp/udp/ip statistics (e.g., packets sent, packets received, 
>errored packets, etc.)
>on a per-interface level?     I'm trying to analyze some USB networking 
>problems from
>a host-to-host link (running UDP/IP over the USB), and need some way of 
>monitoring
>for networking errors across this link.
>

Netstat(1) has counters; will these do the trick?  Beyond that, look at 
pkgsrc/net/ntop.

		--Prof. Steven M. Bellovin, http://www.cs.columbia.edu/~smb