Suppose if I want to capture any packets for my openmpi program, if I can&#39;t filter packets by ports, then how can the sniffer tell which packets are from/to any processes of my penmpi program?<br><br><div><span class="gmail_quote">
On 5/19/07, <b class="gmail_sendername">Tim Prins</b> &lt;<a href="mailto:tprins@open-mpi.org">tprins@open-mpi.org</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Open MPI uses TCP, and does not use any fixed ports. We use whatever ports the<br>operating system gives us. At this time there is no way to specify what ports<br>to use.<br><br>Hope this helps,<br><br>Tim<br><br>On Friday 18 May 2007 05:19 am, Code Master wrote:
<br>&gt; I run my openmpi-based application in a multi-node cluster.&nbsp;&nbsp;There is also<br>&gt; a sniffer computer (installed with wireshark) attached to a listener port<br>&gt; on the switch to sniff any packets.<br>&gt;<br>
&gt; However I would like to know the protocol (UDP or TCP) as well as the ports<br>&gt; used by openmpi for interprocess communication so that wireshark can only<br>&gt; capture these packets.<br>&gt;<br>&gt; Thanks!<br>
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