[Planetlab-users] Re: Networking-related issues

[Hecker W]

Hi Sapan,

I have tested my code on alice,delta and planetlab-7. I got totally
different results on these three nodes!
1) For planetlab-7, the problem has been solved. I have been
successfully run the TCPDUMP. I got the TCP SYN/ACK and all the
payloads. I have done tcp reassembly and recovered the file I
transfer. They are indeed same!
2) For alice, I think I might get all the payload packets. However,
the TCP SYN/ACK packet comes AFTER the TCP ACK packet from the
senders, although TCP SYN/ACK packet's timestamp is earlier. In other
words, the tcpdump trace is not sorted by the timestamp which make my
analysis tool fail.
3) For delta, I only get outgoing direction traffic (same for TCP and UDP).

If you guys can make every node like planetlab-7, my problem is
solved. Thanks a lot!

If you guys need me to provide any trace or other information, please
just let me know.

-Zhichun

On Sun, Jul 27, 2008 at 11:14 PM, Sapan Bhatia <sapanb at cs.princeton.edu> wrote:
> Hello,
>
> The following issues have (hopefully) been resolved on a set of alpha
> nodes (listed below). If you complained about any of them, then please
> kindly retry your code to verify the fixes.
>
> * Intermittent loss of TCP payload packets with packet sockets
> * Syn/Ack packets not showing up in tcpdump
> * TCP-related ICMP error messages not showing up in tcpdump.
>
> The nodes are: [alice,delta].cs.princeton.edu and planetlab-7.cs.princeton.edu.
>
> Please verify all three nodes, if possible.
>
> Thanks in advance,
> Sapan
>