Re: maximum ipv4 bgp prefix length of /24 ?

[Owen DeLong via NANOG]

> On Sep 28, 2023, at 22:29, Saku Ytti <s...@ytti.fi> wrote:
> 
> On Fri, 29 Sept 2023 at 08:24, William Herrin <b...@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