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On 8/15/12 12:39 , David Lebrun wrote:<br>
<span style="white-space: pre;">><br>
> I have a suggestion regarding the udp traceroute feature:
allowing the<br>
> user to specify the source port.<br>
><br>
> The motivation for this suggestion is to keep consistent
paths between<br>
> two traceroutes towards the same destination. I understand
that the<br>
> source port is used to discriminate concurrent traceroutes,
so perhaps<br>
> allocating a range for user-defined source ports would do the
trick.<br>
><br>
></span><br>
The paris-traceroute mode, which is default for firmware above 4400
keeps the source port consistent as long as a UDM is running on a
probe. It does vary the destination port to trigger different
routes, but the variation is included in the output (paris_id)<br>
<br>
Unfortunately, for IPv4 the source port is needed by the traceroute
implementation, so it cannot be made user settable.<br>
<br>
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