Hi Benoit,
> How does the Power Group Identifier ("which has node-local significance")
> refers to a specific Power State in
> https://datatracker.ietf.org/doc/draft-ietf-green-power-and-energy-yang/,
> basically on/off/sleep (see YANG identities power-state-on, power-state-off,
> and power-state-sleep)?
The power state is is not reflected in the Power Group Identifier (PGI). The
PGI is just associated with a power group, which is an abstraction of some
pieces of hardware in the hierarchy. The physical interfaces are the leaves in
this hierarchy and the power state for the interfaces is reflected in the IS-IS
adjacencies. Interfaces that have an adjacency are (obviously) in
power-state-on. Interfaces with a sleeping adjacency are in power-state-sleep.
There is no tracking of interfaces in power-state-off, nor of interfaces that
are power-state-on but have not formed an adjacency. There is no tracking of
power state of higher levels of hardware. Presumably when all relevant
interfaces are sleeping, the platform can put higher level hardware to sleep.
Once again, we are not trying to perform management plane functions, only
control plane traffic engineering.
Cheers,
Tony
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