Re: [Lsr] Flow Control Discussion for IS-IS Flooding Speed

[Peter Psenak <[e-mail]>]

Tony,

On 19/02/2020 20:25, [e-mail] wrote:
> 
> Peter,
> 
>> I'm not scared of polynomial evaluation, but the fact that my IGP 
>> implementation is dependent on the PD specifics, which are not 
>> generally available and need to be custom built for each PD 
>> specifically. I always thought a good IGP implementation is PD agnostic.
> 
> 
> Your implementation is always dependent on the underlying hardware.  We 
> have timers, we have filesystems, we have I/O subsystems, threads, and 
> clocks to contend with. 

none of the above is dependent on the LC specific hardware.

> The input queue in the hardware is a fact of 
> life and knowing about it can improve our implementations.
> 
> Because the PD layer can provide isolation from the specifics, the IGP 
> implementation is reasonably abstracted from those specifics, in much 
> the same way that the OS has abstracted us from the remainder of the 
> underlying hardware. All I’m proposing is adding one more item to that 
> PD abstraction.

easy to say with a single PD. If you have 20, each with a different 
architecture, it becomes a different problem.

thanks,
Peter


> 
> Regards,
> Tony
>