[babel] minor DTLS comment

"STARK, BARBARA H" <bs7652@att.com> Fri, 04 January 2019 13:35 UTC

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From: "STARK, BARBARA H" <bs7652@att.com>
To: Babel at IETF <babel@ietf.org>
Thread-Topic: minor DTLS comment
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Date: Fri, 04 Jan 2019 13:35:04 +0000
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Subject: [babel] minor DTLS comment
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Since the DTLS draft is still open for comments, I do have a small one about how the UDP ports are characterized.
The IANA assigned ports are default values, and need to be portrayed as such. It's allowed (or should be) for deployed instances to use other values. This is pretty much true of all protocols. Certainly the base babel protocol allows other values to be used (which is why the homenet babel profile mandated use of 6696).

Maybe instead of
   All Babel over DTLS nodes MUST act as DTLS servers on the "babel-
   dtls" port (UDP port TBD), and MUST listen for traffic on the
   unencrypted "babel" port (UDP port 6696).

say
   All Babel over DTLS nodes MUST act as DTLS servers on the "babel-
   dtls" port, and MUST listen for traffic on the
   unencrypted "babel" port.
   The IANA-assigned values of 6696 for the "babel" port and 
   TBD for the "babel-dtls" port SHOULD be used.

Barbara