On 20/Jun/20 22:00, Baldur Norddahl wrote:


I can't speak for the year 2000 as I was not doing networking at this level at that time. But when I check the specs for the base mx204 it says something like 32 VRFs, 2 million routes in FIB and 6 million routes in RIB. Clearly those numbers are the total of routes across all VRFs otherwise you arrive at silly numbers (64 million FIB if you multiply, 128k FIB if you divide by 32). My conclusion is that scale wise you are ok as long you do not try to have more than one VRF with a complete copy of the DFZ.

I recall a number of networks holding multiple VRF's, including at least 2x Internet VRF's, for numerous use-cases. I don't know if they still do that today, but one can get creative real quick :-).



More worrying is that 2 million routes will soon not be enough to install all routes with a backup route, invalidating BGP FRR.

I have a niggling feeling this will be solved before we get there.

Now, whether we can afford it is a whole other matter.

Mark.