Rob,

we run SLES10 with :

lnxt002:~ # rpm -q tcpdump
tcpdump-3.9.4-14.2 

Any suggestions for the datalinktype, I tried a few, but they are not
accepted, or when specifying En10MB I get the same junk as without the
-y option.

Same for the SLES9 system we run:
lnxt003:~ # rpm -q tcpdump
tcpdump-3.8.1-49.1

regards,
Harry

-----Oorspronkelijk bericht-----
Van: Linux on 390 Port [mailto:[EMAIL PROTECTED] Namens Rob van
der Heij
Verzonden: Wednesday, May 16, 2007 1:19 PM
Aan: [email protected]
Onderwerp: Re: TCPIP sniffering

On 5/16/07, Harry Metske <[EMAIL PROTECTED]> wrote:

> When we do this on zLinux, we see only weird packets passing, not 
> anything that is recognized by either tcpdump or ethereal.
> The packets look like this :

The level 3 packets are plain IP.  I believe there was something done to
the tcpdump package by SuSE to make it pick the proper type. You might
be able to convince it with the "-y" option.

Mine just works out of the box (SLES9 64bit) lrobv1:~ # rpm -q tcpdump
tcpdump-3.8.1-49.4

lrobv1:~ # tcpdump -i hsi0 -n -c 20
tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode listening on hsi0, link-type EN10MB (Ethernet), capture size 96
bytes
04:13:40.484243 IP 212.61.81.181.3969 > 148.100.96.70.22: . ack
421602459 win 16024
04:13:40.537029 IP 148.100.96.70.22 > 212.61.81.181.3969: P 1:217(216)
ack 0 win 19296
04:13:40.536892 IP 148.100.96.70.22 > 212.61.81.181.3969: P
217:333(116) ack 0 win 19296
04:13:40.641418 IP 212.61.81.181.3969 > 148.100.96.70.22: . ack 333 win
15692
04:13:40.641458 IP 148.100.96.70.22 > 212.61.81.181.3969: P
333:485(152) ack 0 win 19296
04:13:40.641753 IP 148.100.96.70.22 > 212.61.81.181.3969: P
485:569(84) ack 0 win 19296
04:13:40.746184 IP 212.61.81.181.3969 > 148.100.96.70.22: . ack 569 win
15456

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