Re: maximum ipv4 bgp prefix length of /24 ?

[Owen DeLong via NANOG <nanog () nanog org>]

> On Sep 28, 2023, at 22:29, Saku Ytti <saku () ytti fi> wrote:
>
> On Fri, 29 Sept 2023 at 08:24, William Herrin <bill () herrin us> wrote:
>
> > Maybe. That's where my comment about CPU cache starvation comes into
> > play. I haven't delved into the Juniper line cards recently so I could
> > easily be wrong, but if the number of routes being actively used
> > pushes past the CPU data cache, the cache miss rate will go way up and
> > it'll start thrashing main memory. The net result is that the
> > achievable PPS drops by at least an order of magnitude.

For that to be an issue, packets would need to be CPU switched which isn’t the case on the MX platform. 

Owen