Re: Too Much ARP-ing

Joel D. Kraft (kraft@alpha.CES.CWRU.Edu)
Sun, 26 Jan 97 23:17:31 EST

>Not to be stating the obvious, but tcpdump puts the card into
>promiscuous mode when you run it. Or are you snooping the net on a
>seperate interface and/or machine?

I'm snooping on the same interface. If I was really in promiscuous mode,
then I'm assuming I would see a lot more traffic than I am seeing (this
is a very busy net segment). According to the man pages for tcpdump,
though, I can keep it from going into promiscuous mode (which is what I

-p Don't put the interface into promiscuous mode.
Note that the interface might be in promiscuous for
some other reason; hence, `-p' cannot be used as an
abbreviation for `ether host {localhost} or broad-

As far as it already being in that mode, should I not believe ifconfig?

 Joel D. Kraft    | Case Western Reserve University                ____ | Department of Computer Engineering & Science   \  /