maximum ipv4 bgp prefix length of /24 ?
Owen DeLong
owen at delong.com
Fri Sep 29 16:16:45 UTC 2023
> On Sep 28, 2023, at 22:29, Saku Ytti <saku at ytti.fi> wrote:
>
> On Fri, 29 Sept 2023 at 08:24, William Herrin <bill at 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
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