> On 15. Oct 2020, at 23:23, David Laight <David.Laight@ACULAB.COM> wrote:
> 
> From: Marcelo Ricardo Leitner
>> Sent: 15 October 2020 18:43
>> 
>> Actually..
>> 
>> On Tue, Oct 13, 2020 at 03:27:41PM +0800, Xin Long wrote:
>> ...
>>> Also add sysctl udp_port to allow changing the listening
>>> sock's port by users.
> 
> I've not read through this change...
> 
> But surely the UDP port (or ports) that you need to use
> will depend on the remote system's configuration.
The local encapsulation port can be system wide, the remote encapsulation port
is per remote address. See https://tools.ietf.org/html/rfc6951#section-5.1

Best regards
Michael
> 
> So they need to be a property of the socket, not a
> system-wide value.
> 
> I can easily imagine my M3UA code connecting to different
> network providers which have decided to use different
> UDP port numbers.
> 
> 	David
> 
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