[manet] DLEP Peer Offer port requirements

"Sipos, Brian J." <Brian.Sipos@jhuapl.edu> Fri, 05 November 2021 12:41 UTC

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From: "Sipos, Brian J." <Brian.Sipos@jhuapl.edu>
To: "manet@ietf.org" <manet@ietf.org>
Thread-Topic: DLEP Peer Offer port requirements
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Date: Fri, 05 Nov 2021 12:41:07 +0000
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Subject: [manet] DLEP Peer Offer port requirements
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All,

I ran into what I think is a gap in the DLEP Peer Offer Signal requirements
[1]. Currently, there are requirements about the IP addresses of the Peer
Offer Signal but not for the UDP ports. In other protocols where UDP is used
in a request-response pattern the source and destination ports of the
response datagram are swapped from the ports of the request datagram. Is
this pattern also expected to be used by a DLEP modem? If not, how are the
ports expected to be coordinated so that the router will receive the Peer
Offer Signal?

When the correct behavior is figured out, I will write up an errata for this
small portion of the document to clarify the Peer Offer UDP ports.

Thanks for any clarification,

Brian S.

 

[1] https://www.rfc-editor.org/rfc/rfc8175.html#section-12.4