Robert,

> If FlexAlgo is adopted, then we should expect that it will get stressed and 
> that further conditions will be added to a FAD. The problem will only become 
> worse the more success that FlexAlgo has. It sounds to me like you want 
> FlexAlgo to fail, which seems strange.
> 
> Well I have a bit of a different view on this one. 
> 
> If we keep networks simple (which is what IMHO we should do) I don't see that 
> we are any close to exceeding FAD limits as per today's encoding. 
> 
> Now if on the other hand we load tons of application awareness into the 
> network and flatten all of this to the IGP transport layer - sure you are 
> right. That limit and what's worse today's REs CPU and RAM capacity will be 
> off limits. But do we really want this ? Would you call this a FlexAlgo 
> success ? 
> 
> Isn't it better to keep all of the smartness as the overlay ? After all, 
> wherever you look around everything is transported encapsulated already. 


I believe that I am the loudest voice asking people to not use the IGP as a 
dump truck. Unfortunately, I don’t believe that message resonates with people. 
As a result, we see people overburdening protocols when we need new subsystems. 

So yes, I would like us to not add more complexity to the IGP. But I expect 
that we will. And when we do, it would be best if our implementations didn’t 
implode.

Tony


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