Penetration Testing mailing list archives

Re: unswitched behavior of a switched network...


From: Jon Hart <jhart () spoofed org>
Date: Mon, 16 Oct 2006 14:53:38 -0700

On Mon, Oct 16, 2006 at 03:55:43PM -0400, Buz Dale wrote:
I can think if a couple of possibilities.  1) This is
broadcast/multicast traffic. 2) The mac addresses are unknown to the
switch (So it will flood to find them.) 3) The port could be a trunk or
a mirror of a trunk.

I am also seeing normal broadcast/multicast traffic, but that is to be
expected.  #3 is not the case here.

As for #2, thats kinda where I was going with my original question --
why would a switch that is processing a session between two endpoints
suddently forget the MAC? Yes, there are timeouts in play here, but
aren't those along the lines of several minutes?

Thanks,

-jon

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