Chris,

> On Jul 16, 2022, at 6:19 PM, Christian Hopps <[email protected]> wrote:
> 
> 
> Robert Raszuk <[email protected]> writes:
> 
>> Btw this independent attempt by two WG groups to normalize link state
>> data is a clear proof that the YANG model has failed here.
> 
> I'm not sure which "YANG model" you are referring to here (perhaps you just 
> mean YANG in general?), but I don't think YANG itself has failed at all. Has 
> anyone even tried to attack this problem directly using it yet?
> 
> I'm pretty sure that GRPC is being used by google for telemetry, I don't know 
> if they're using it for LSDB information or not, but they have the 
> infrastructure setup for it obviously. I'm pretty sure Microsoft is doing 
> similar stuff to google with YANG modeled data as well.

gNMI streaming for OC IGP models is a thing.
See container link-state-database:
https://github.com/openconfig/public/blob/master/release/models/isis/openconfig-isis.yang
 
<https://github.com/openconfig/public/blob/master/release/models/isis/openconfig-isis.yang>

> 
> FWIW, YANG is a modeling language describing structured data, the transport 
> is just as important here, and NETCONF or RESTCONF probably aren't the ones 
> to use for your application. Maybe someone needs to look into marrying the 
> correct transport, with the correct YANG modeled data and describe a system 
> that would do what you want using existing technologies.

In Google-OC-land, gNMI is the mechanism generally being used for such things.

I've not been properly monitoring netconf recently, but I believe RFC 8640 is 
intended to provide the analogous IETF service.

-- Jeff

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