Carlos Velasco <lkml@xxxxxxxxxxxx> wrote: > > 03:12:22.484863 00:13:21:cc:54:a6 > 00:0d:bc:a0:e2:82, ethertype IPv4 > (0x0800), length 12546: 192.168.128.182.59061 > 193.147.150.12.25: . > 68786:81266(12480) ack 228 win 40 <nop,nop,timestamp 9644391 425655748> > > LENGTH: 12546 !! > But still worse, I wrote the full sniffer traces to a file for further > analysis with Ethereal, and there I see that not only these long packets > are above MTU, all they have bad TCP checksums. 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. In order to see what really goes out, you'll need to run a packet dump beyond the NIC. If that is not possible, you can try disabling TSO with ethtool -K. Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
