FRR as Route-Reflector & Scaling stats

Fri Nov 15 11:04:12 UTC 2019

> ERCIN TORUN
> Sent: Friday, November 15, 2019 9:34 AM
> 
> Hello Rakesh,
> 
> As James said, better to ask it at FRR mailing list.
> 
> Generally chipset is what limits the scale (e.g. trident2 is 128k ipv4 lpm
> https://docs.cumulusnetworks.com/cumulus-linux/Layer-3/Routing/ ).  If
> you disable "zebra" daemon, FRR works only in control-plane then you would
> most likely have a limitation with memory/RAM only. (speed is another
> issue).
> 
Data-plane lookup memory limitations have nothing to do with the scale of a RR function, as you eluded to (if the RR is in path then it has to act as any other routing node so FIB scaling limitations apply -but that is completely orthogonal to the RR function). 
One would assume that NOS to be used for a crucial role in the overall BGP infrastructure would feature the essential ability to limit the installation (complete/selective) of routes to FIB/data-plane. (or in the modern virtual deployments lack the data-plane altogether). 

adam