On 01/12/2019 18:20, Clément Guivy wrote: > On 01/12/2019 13:43, Frederik Kriewitz wrote: >> 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. >> > > Hi, that's good news. One thing that still confuses me though is that > the default values for these settings are the same in Debian 9 (4.9 > kernel) and Debian 10 (4.19 kernel), so I would expect the behaviour to > be the same between both versions in that regard. > Also I'm not sure to understand what this max_size parameter actually > does since I have it to default value (4096), and yet ipv6 route table > at the moment is >70k entries large without the kernel complaining.
To add our info - We're using Intel 82599ES NICs. We have full table on v4 and v6, and about 20 neighbors on each. Our route/max_size for v4 and and v6 are defaults (2M and 4096 respectively) - and as noted, these values are the same in our Stretch and Buster boxes. Andrew
