Herbert Xu escribió:
> These packets look like normal TSO packets. Linux will send a
> packet containing more data than fits in a packet to the NIC. The
> NIC will then segment the packet for us.
>
> If that is not possible, you can try disabling TSO with ethtool -K.
I see...
I have tracked the change to 2.6.18.
Using kernel 2.6.17.14 and below makes tcpdump/libpcap to display the
real packets.
Could this be a change in the tg3 driver to support TSO committed in 2.6.18?
And a question... how this TSO affects netfilter?
> In order to see what really goes out, you'll need to run a packet
> dump beyond the NIC.
They are here:
Sniffer traces taken through port mirroring in the switch
(ethereal with filter: host flash.cnio.es):
http://www.nimastelecom.com/smtptraces/smtptrace_portmirror.pcap
But still wondering how could this affect Netfilter... my real problem
is that Netfilter drops ACK packets because it doesn't see the
connection established/related.
I will try to do some more research.
Regards,
Carlos Velasco
CCNP & CCDP Cisco Certified Network Professional
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