Hi,
I recently noticed an issue with some routers complaining with that message:
"kernel: Route cache is full: consider increasing sysctl
net.ipv6.route.max_size."
These routers are running FRR on Debian 12 , kernel 6.1.0-17-amd64. They
are receiving full routing table and routes are inserted into the kernel
routing table.
I saw a similar error here [1] and it leads me to [2] as well but I
should admit I did not read everything.
I did not dive into the details of the two links but for now , I want to
increase that value (and find the source of that error).
The current value of net.ipv6.route.max_size is: 4096 . I guess it's the
default on at least that kernel.
For reference net.ipv4.route.max_size=2147483647 .
Of course, we cannot correlate the two but I was wondering, what either
people are using or what might be a reasonable value for the IPv6
counterpart.
1. https://bugzilla.redhat.com/show_bug.cgi?id=1813691
2.
https://lore.kernel.org/netdev/e022d597-302d-c061-0830-6ed20aa61...@qtmlabs.xyz/T/#u
--
Willy Manga
