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-c061-0830-6ed20aa61e56@qtmlabs.... -- Willy Manga