IPv6 BGP & kernel 4.19

[Clément Guivy]

On 24/09/2020 14:37, Oliver wrote:
> Hello,
> 
> after upgrading to debian buster with kernel 4.19 we also had problems.

How filled is your route cache compared to the sysctl treshold? See the 
(hex) value with :
cut -d'' -f 6 /proc/net/rt6_stats

Do you get a "Network is unreachable" error at some point if you do an 
"ip route get" on each prefix of your (ipv6) routing table? (while you 
are doing this test you should see the cache being filled according to 
the rt6_stats file as said before)

How filled is your neighbor table compared to the sysctl treshold? You 
can read it with :
ip -6 neigh sh | wc -l

Do you notice random drops on Bird sessions?