On Sun, Dec 1, 2019 at 12:57 PM Daniel Suchy <da...@danysek.cz> wrote: > One idea that comes in my mind is default kernel limit for IPv6 routes > in memory (sysctl net.ipv6.route.max_size); and such default is quite > low for fullbgp/DFZ IPv6 deployments and it's still set to 4096 on > Debian/Buster with stock kernels. Can people having issues with 4.19 > kernels check sysctl mentioned above?
This is our current suspicion too. neighbours and routes are well below 4096 in our case. We also had to adjust net.ipv6.neigh.default.gc_thresh1/2/3. Since the adjustment it's been working fine.