MX-100 Route Table

[Meerkat99]

Hi folks,

Can anyone please advise if there is a finite number for the amount of routes that can populate the MX-100 routing table before routes are no longer reachable?

For example, in our hub and spoke configuration, we have run into instances where a client on a subnet advertised from a spoke (ie 172.25.80.0/27) is not reachable from the MX Hub who’s routes are in excess of 11500, however clients on the same subnet are reachable from a 2nd Hub who’s routing table has approx 3k routes. 
Hope that makes sense!

Thanks..

[alemabrahao]

I once read (but couldn't find the document) that the MX100 is known to reliably support around 5,000 to 10,000 routes, but performance degradation or route drops may occur beyond that, especially in hub-and-spoke topologies with many spokes advertising multiple subnets.

But the truth is that there is no official document that attests to this.

[DarrenOC]

Agree with @alemabrahao. I’ve never seen anything documented for the number of routes supported on an MX. 

Did stumble across this interesting document from CiscoLive around MX performance which was a good read:

https://www.ciscolive.com/c/dam/r/ciscolive/global-event/docs/2024/pdf/BRKTRS-2007.pdf

[cmr]

Can you not summarise some of the routes, unless you are an ISP that seems like an awful lot of routes in one devices routing table.  I would imagine the lookup time is not quick at all?