Hi Raul,

> While I see interesting to announce that a power group is power-save capable, 
> I would also see interesting the possibility to advertise that a power-group 
> is in fact in power-save mode. Announcing the capability could be useful for 
> external elements to later interact with the node but advertising the current 
> power-save mode can be also useful for standalone node decisions like 
> energy-aware flex-algo for example.


For our use case, we believe that it’s both necessary and sufficient for the 
interfaces in the power group to be put into power sleep, and hence withdrawn 
from neighbor advertisement. Once all members of a power group are withdrawn, 
the power group itself may also be withdrawn (or not).  We do not update the 
state of the power group because it does not affect path computation and 
churning the LSDB has a network wide impact.


> About the unidirectional Sleeping BW, could you expand on the use case?.


Consider the case where there is a LAG of 10 100Gbps interfaces.  3 of them 
have been put into power sleep.  How do we inform others that there is 300Gbps 
available but not otherwise advertised at present?

T


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