Carlos Velasco <[email protected]> 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~} <[email protected]>
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-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
