On Friday 20 August 2004 18:23, Rob van der Heij wrote:
Rv> I know better than argue with you... I recall the early version had
Rv> tweaked one of the formats since I could not use the same thing to
Rv> decode a tcpdump stream from my PC anymore.

Good point.  If you run "tcpdump-qeth -r " on a file you captured on a PC, I
suppose you will get garbage because the script will add an extra LLC header.
The real tcpdump program should have been used in this case.  Hopefully
SuSE's package did not make "tcpdump" a link to "tcpdump-qeth"...  :)

Last year I was using tcpdump-qeth to capture a trace (using the -w option)
from a Linux guest on a VSWITCH, and I was able to view the result with
standard ethereal on my laptop.  So I know it works! ;)  (For the
ultra-curious, on page 36 of the VSWITCH Redpaper you can see the result of
such a capture.  Notice the all-zeroes MAC addresses in the Ethernet header
-- that 'empty' Ethernet-II header is what tcpdump-qeth adds to the packet
flow to keep tcpdump and friends happy.)

Cheers,
Vic

PS: The same Redbook credits tcpdump-qeth to Holger Smolinski.  See, I knew it
was an IBMer!  Sorry, Holger ;)

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