Re: tcpdump broken after rh9 2.4.20-27.9 kernel upgrade

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Jason Dixon writes:
 > On Sun, 2003-12-28 at 13:06, Robert Brown wrote:
 > > OK, now I am ready to incriminate the hubs!  I started tcpdump on the
 > > eth0 port of the NIDS and all it could sniff was packets with its own
 > > address or braodcast packets such as arps.  I then power cycled the
 > > hub.  When the hub powered back up, tcpdump siffed 2 packets that did
 > > not have its own ip address as either src or dst, then it quit!  I
 > > power cycled again: same thing -- 2 packets, then nada.  It seems that 
 > > these "hubs" are blocking traffic not destined for a port after a
 > > brief period of "proper hub-like" operation.
 > 
 > Sorry for butting in late in the thread, but didn't you already mention
 > that these "hubs" worked fine with the same hosts running an older
 > kernel?  Why would the change of kernel affect the behavior of dumb
 > network devices?  Did I miss something?

Yes, I said that, but maybe it was the previous hubs that worked
fine.  It was a bad tiome to be working on the network.  It was
Christmas Eve, I was coming down with the flu, Red Hat had just
announced a kernel update that looked like it would help me with a
firewall problem, I had just switched numerous NICs to upgrade from 10 
to 100 MBPS, and of course I upgraded the hubs also.  I was sure that
it worked before the kernel upgrade, but now I am not so sure anymore.

-- 
--------  "And there came a writing to him from Elijah"  [2Ch 21:12]  --------
R. J. Brown III  rj@xxxxxxxxxxx http://www.elilabs.com/~rj  voice 859 567-7311
Elijah Laboratories Inc.    P. O. Box 166, Warsaw KY 41095    fax 859 567-7311
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