Re: [netconf] draft-ietf-netconf-udp-notif-10

[Andy Bierman <[e-mail]>]

On Mon, Aug 7, 2023 at 12:13 AM Benoit Claise <[e-mail]>
wrote:

>
>
> On 8/7/2023 8:50 AM, Jürgen Schönwälder wrote:
>
> On Sat, Aug 05, 2023 at 08:44:16AM -0700, Andy Bierman wrote:
>
> Perhaps the scope of the draft should be narrowed so it is only intended to
> YANG Push or server events that do not need reliable delivery.
>
>
> So there needs to be at least a very tight applicability statement.
>
> Well, isn't obvious from the title and abstract? "UDP-based protocol for
> YANG notifications to collect data from networking devices"
> Is there really a need to say "the target of this draft is unreliable
> delivery of YANG Push b/c UDP is unreliable"
>
>
I think the segmentation issue ignores the fact that even a single segment
message may not get through.
There is no reliability at all if UDP is used. There is only a high
probability that a 1 segment message will be delivered.

Configured notifications can be for event stream or datastore subscriptions.
Event stream notifications are almost always small in size, but infrequent
so cannot be lost.
It would not hurt to discuss the use-cases in the draft and mention how
non-reliable delivery
would affect the use-case.  E.g. frequent datastore updates for telemetry
data are less sensitive
to message loss than normal network management (e.g. fault monitoring)


Regards, Benoit
>

Andy