Date: Sun, 9 Feb 2003 09:32:12 -0500 From: Mani Ramadas <mramadas@cs.ohiou.edu> Subject: Re: tcptrace Query for Mobile IP analysis using Tcptrace Message-ID: <20030209093212.A29748@irg.cs.ohiou.edu>
Hi Rajat,
I suspect, the problem is because tcptrace is not Mobile IP "aware". I
think tcptrace sees the connection during the phase where the receiver is in
the foreign network as a separate TCP connection.
To check my hyposthesis, could you please use the dumpfiles collected at
the sender side and run
tcptrace -l <dumpfile>
on it? I suspect it would report two connections during the phases where
the Receiver is in the foreign network, and it is in the home network.
- Mani.
On Sun, Feb 09, 2003 at 08:40:36PM +0800, Rajat Malhotra wrote:
> Hi there,
>
> I am trying to get the statistics for a Mobile IP scenario, where the
> mobile node changes the point of attachments between various subnets. I am
> running the TCPtrace in the Following scenario:
>
> 1. The Sender is a stationary machine on foreign subnet.
> 2. Receiver moves from the home subnet to the foreign (Sender's) subnet.
> 3. Receiver comes back to the Home Network.
>
> I'm running tcpdump on both machines, and using IPerf to send TCP
> packets. The analysis works FINE in the IPerf output and Ethereal
> analysis. However, the problem is:
>
> "When I run XPlot to view the Throughput graphs made by Tcptrace, it
> shows only the graph for the period Mobile Node i.e., Receiver was in Home
> Network (which is also the address I'm sending packets to using IPerf). It
> does not plot graphs for the transit in the foreign netwok."
>
> However, IPerf shows me what I want to see, but somehow Tcptrace is not
> giving the graphs for the handoff region.
>
> Am I missing some command in Tcptrace (or Tcpdump)? I'm new to Tcptrace
> (and performance analysis) and would appericiate the kind advice of guru's
> here.
>
> Thanks and Best Regards,
>
> Rajat Malhotra
>
>
>
> ----------------------------------------------------------------------------
> To unsubscribe, send a message with body containing "unsubscribe tcptrace" to
> majordomo@tcptrace.org.
--
"A man is but a product of his thoughts; what he thinks, that he becomes."
- Mahatma Gandhi
____________________________________________________________________________
* Manikantan Ramadas * IRG, Ohio Univ. * http://irg.cs.ohiou.edu/~mramadas *
____________________________________________________________________________
----------------------------------------------------------------------------
To unsubscribe, send a message with body containing "unsubscribe tcptrace" to
majordomo@tcptrace.org.
This archive was generated by hypermail 2b30 : 02/09/03 EST