Hi, I'm upgrading my core router (running an old bird 1.3.10) with a new Ubuntu 16.04 running 1.6.3 from the official PPA. Actually it'a a pretty simple configuration ISP3 ISP1 ISP2 | | | | | | NEWROUTER=====<iBGP>======OLDROUTER | | ipv4/21 ipv6/32 In the new router i find a lot of messages "Kernel dropped some netlink messages, will resync on next scan." for both IPv6 and IPv4 For IPv6 daemon this seems to happen only when i start the sessions and load the full table and so I think it could be acceptable. For IPv4 daemon this seems to happen *a lot* when I start the BGP session with the iBGP enabled (and also this I think could be acceptable), but the message gets printed sometimes (a single line every 5/10 minutes) when the BGP is running normally. I already tried to adjust the net.core mem kernel parameters with: net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 net.core.optmem_max = 65536 net.core.rmem_default=1064960 net.core.wmem_default=1064960 But the messages are still there. Any hints? maybe the rmem_default is still too low? Thanks Giuseppe